ICAMS Members
apl. Prof. Dr. Fathollah Varnik
Research Group LeaderGroup: Theory and Simulation of Complex Fluids
Department of Scale-Bridging Thermodynamic and Kinetic SimulationICAMS
Ruhr-Universität Bochum
IC 02-505
Universitätsstr. 150
44801 Bochum
Tel. +49 234 32 29194
Fax: +49 234 32 14989
Email: Fathollah Varnik
ORCID ID: 0000-0003-2641-268X 
Dynamics of free surfaces, droplets and multi-component fluids
Lattice Boltzmann modeling
Convection-diffusion in micro-channels
Non-linear rheology of disordered systems
My mission:
Pulsatile flow within an aneurysm for different vessel wall elasticity as indicated. Strongest flow occurs for the case of a soft (degraded) tissue on the right.
Current research interests of Fathollah Varnik cover a broad range including molecular scale problems and phenomena on the mesoscopic scale. Some examples are given below.
Molecular Dynamics:- Additive effects on shape memory behavior in polymers
- Role of heterogeneity for shear banding in metallic glasses.
- Effects of deep thermal cycling on ductility in metallic glasses
- Structure formation in metallic foams
- Dendritic growth in the presence of convection
- Flow and stresses in cerebral aneurysma
- Pressure-stress phase shift in blood flow through flexible arteries
Research Interests:
Dynamics of free surfaces, droplets and multi-component fluids
Lattice Boltzmann modeling
Convection-diffusion in micro-channels
Non-linear rheology of disordered systems
- OpenPhase
Open source phase field simulation software
https://openphase.rub.de/
- A. Lagogianni, F. Varnik.
Temperature rise inside shear bands in a simple model glass, International Journal of Molecular Sciences, MDPI AG,, 23, 12159, (2022)
- M. M. Bruns, F. Varnik.
Enhanced dynamics in deep thermal cycling of a model glass, The Journal of Chemical Physics, AIP Publishing,, 156, 234501, (2022)
- H. Wang, K. Uhlmann, V. Vedula, D. Balzani et al.
Fluid-structure interaction simulation of tissue degradation and its effects on intra-aneurysm hemodynamics, Biomechanics and Modeling in Mechanobiology, Springer Science and Business Media LLC,, 21, 671–683, (2022)
- M. M. Bruns, F. Varnik.
Rejuvenation in deep thermal cycling of a generic model glass: a study of per-particle energy distribution, Materials, MDPI AG,, 15, 829, (2022)
- H. Wang, D. Balzani, V. Vedula, K. Uhlmann et al.
On the potential self-amplification of aneurysms due to tissue degradation and blood flow revealed from FSI simulations, Frontiers in Physiology, Frontiers Media SA,, 12, 785780, (2021)
- H. Wang, T. Krüger, F. Varnik.
Geometry and flow properties affect the phase shift between pressure and shear stress waves in blood vessels, Fluids, MDPI AG,, 6, 378, (2021)
- M. M. Bruns, M. R. Hassani, F. Varnik, A. Hassanpour et al.
Decelerated aging in metallic glasses by low temperature thermal cycling, Physical Review Research, The American Physical Society, 3, 013234, (2021)
- A. Marquardt, E. Mahmoudinezhad Zirdehi, F. Varnik, Y. Shen et al.
A mechanical analysis of chemically stimulated linear shape memory polymer actuation, Materials, 14, 481, (2021)
- E. Mahmoudinezhad Zirdehi, H. Dumlu, G. Eggeler, F. Varnik.
On the size effect of additives in amorphous shape memory polymers, Materials, 14, 327, (2021)
- S. Vakili, I. Steinbach, F. Varnik.
Multi‑phase‑field simulation of microstructure evolution in metallic foams, Scientific Reports, 10, 19987, (2020)
- R. Schiedung, M. Tegeler, D. Medvedev, F. Varnik.
Simulation of capillary-driven kinetics with multi-phase-field and lattice Boltzmann method, Modelling and Simulation in Materials Science and Engineering, 28, 065008, (2020)
- E. Mahmoudinezhad Zirdehi, T. Voigtmann, F. Varnik.
Multiple character of non-monotonic size-dependence for relaxation dynamics in polymer-particle and binary mixtures, Journal of Physics - Condensed Matter, 32, 275104, (2020)
- H. Wang, T. Krüger, F. Varnik.
Effects of size and elasticity on the relation between flow velocity and wall shear stress in side-wall aneurysms: A lattice Boltzmann-based computer simulation study, PLOS ONE, Public Library of Science (PLoS),, 15, e0227770, (2020)
- M. R. Hassani, M. M. Bruns, F. Varnik.
A crossover in spatio-temporal correlations of strain fluctuations in glass forming liquids, Journal of Statistical Mechanics: Theory and Experiment (JSTAT), 2020, 014002, (2020)
- M. R. Hassani, A. Lagogianni, F. Varnik.
Probing the degree of heterogeneity within a shear band of a model glass, Physical Review Letters, 123, 195502, (2019)
- E. Mahmoudinezhad Zirdehi, F. Varnik.
Non-monotonic effect of additive particle size on the glass transition in polymers, The Journal of Chemical Physics, 150, 024903, (2019)
- M. R. Hassani, E. Mahmoudinezhad Zirdehi, K. Krok, P. Schall et al.
Long-range strain correlations in 3D quiescent glass forming liquids, Europhysics Letters, 124, 18003, (2018)
- E. Ghobadi, A. Marquardt, E. Mahmoudinezhad Zirdehi, K. Neuking et al.
The influence of water and solvent uptake on functional properties of shape-memory polymers, International Journal of Polymer Science, Hindawi, 2018, 7819353, (2018)
- M. Gross, F. Varnik.
Shear-density coupling for a compressible single-component yield-stress fluid, Soft Matter, 14, 4577-4590, (2018)
- E. Ghobadi, A. Marquardt, E. Zirdehi, K. Neuking et al.
The influence of water and solvent uptake on functional properties of shape-memory polymers, International Journal of Polymer Science, 2018, 7819353, (2018)
- M. R. Hassani, P. S. Engels, F. Varnik.
Wall effects on spatial correlations of non-affine strain in a 3D model glass, EPL Journal, 121, 18005, (2018)
- R. Schiedung, I. Steinbach, F. Varnik.
Multi-phase-field method for surface tension induced elasticity, Physical Review B, 97, 035410, (2018)
- M. Tegeler, A. Monas, O. Shchyglo, I. Steinbach et al.
Effect of microstructure during dendritic solidification on melt flow: A phase-field lattice-Boltzmann study, Proceedings of the 6th Decennial International Conference on Solidification Processing, (2017)
- R. Schiedung, R. Darvishi Kamachali, I. Steinbach, F. Varnik.
Multi-phase-field model for surface and phase-boundary diffusion, Physical Review E, 96, 012801, (2017)
- S. Vakili, I. Steinbach, F. Varnik.
On the numerical evaluation of local curvature for diffuse interface models of microstructure evolution, Procedia Computer Science, 108, 1852-1862, (2017)
- E. Mahmoudinezhad Zirdehi, A. Marquardt, G. Eggeler, F. Varnik.
Molecular dynamics simulations of entangled polymers: The effect of small molecules on the glass transition temperature, Procedia Computer Science, Elsevier, 108, 265-271, (2017)
- M. R. Hassani, P. S. Engels, D. Raabe, F. Varnik.
Localized plastic deformation in a model metallic glass: A survey of free volume and local force distributions, Journal of Statistical Mechanics: Theory and Experiment, 2016, 084006, (2016)
- Nima H. Siboni, D. Raabe, F. Varnik.
Aging in amorphous solids: A study of the first-passage time and persistence time distribution, Europhysics Letters, 111, 48004, (2015)
- I. Steinbach, F. Varnik.
Modeling the flow in diffuse interface methods of solidification, Physical Review E, Physical Review, 92, 023303, (2015)
- M. Gross, T. Krüger, F. Varnik.
Fluctuations and diffusion in sheared athermal suspensions of deformable particles, Europhysics Letters, 108, 68006, (2015)
- D. Belardinelli, M. Sbragaglia, L. Biferale, M. Gross et al.
Fluctuating multicomponent lattice Boltzmann model, Physical Review E, 91, 023313, (2015)
- S. G. Ayodele, D. Raabe, F. Varnik.
Shear-flow-controlled mode selection in a nonlinear autocatalytic medium, Physical Review E, 91, 022913, (2015)
- F. Farahpour, M. R. Ejtehadi, F. Varnik.
Polyelectrolytes polarization in nonuniform electric fields, International Journal of Modern Physics C, World Scientific Publishing Co Pte Ltd, London UK, 25, 1 - 9, (2014)
- S. Mandal, S. Lang, M. Gross, M. Oettel et al.
Multiple reentrant glass transitions in confined hard-sphere glasses, Nature Communications, Macmillan Publishers Limited, 5, 4435, (2014)
- F. Varnik, S. Mandal, V. Chikkadi, D. Denisov et al.
Correlations of plasticity in sheared glasses, Physical Review E, 89, 1 - 6, (2014)
- M. Gross, T. Krüger, F. Varnik.
Rheology of dense suspensions of elastic capsules: normal stresses, yield stress, jamming and confinement effects, Soft Matter, The Royal Society of Chemistry, 10, 4360-4372, (2014)
- T. Krüger, M. Gross, D. Raabe, F. Varnik.
Crossover from tumbling to tank-treading-like motion in dense simulated suspensions of red blood cells, Soft Matter, 9, 9008-9015, (2013)
- S. Mandal, V. Chikkadi, B. Nienhuis, D. Raabe et al.
Single-particle fluctuations and directional correlations in driven hard-sphere glasses, Physical Review E, The American Physical Society, 88, 022129, (2013)
- D. Medvedev, F. Varnik, I. Steinbach.
Simulating mobile dendrites in a flow, Procedia Computer Science, Elsevier, 18, 2512-2520, (2013)
- M. Gross, I. Steinbach, D. Raabe, F. Varnik.
Viscous coalescence of droplets: a lattice Boltzmann study, Physics of Fluids, 25, 052101, (2013)
- N. H. Siboni, D. Raabe, F. Varnik.
Maintaining the equipartition theorem in small heterogeneous molecular dynamics ensembles, Physical Review E, The American Physical Society, 87, 030101, (2013)
- F. Varnik, A. G. Rios Nogues, M. Gross, I. Steinbach.
Simulation of viscous sintering using the lattice Boltzmann method , Modelling and Simulation in Materials Science and Engineering, IOP Publishing Ltd., UK, 21, 025003, (2013)
- M. Gross, F. Varnik.
Interfacial roughening in non-ideal fluids: dynamic scaling in the weak- and strong-damping regime, Physical Review E, 87, 022407, (2013)
- S. Mandal, M. Gross, D. Raabe, F. Varnik.
Flow heterogeneity and correlations in a sheared hard sphere glass: insight from computer simulations, 4th International Symposium on Slow Dynamics in Complex Systems: Keep Going Tohoku. AIP Conference Proceedings, AIP Publisher, New York, 1518, 266-271, (2013)
- F. Farahpour, A. Maleknejad, F. Varnik, M. R. Ejtehadi.
Chain deformation in translocation phenomena, Soft Matter, ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND, 9, 2750-2759, (2013)
- V. Chikkadi, S. Mandal, B. Nienhuis, D. Raabe et al.
Shear-induced anisotropic decay of correlations in hard-sphere colloidal glasses , EPL Journal, 100, 56001, (2012)
- M. Gross, F. Varnik.
Critical dynamics of an isothermal compressible nonideal fluid, Physical Review E, 86, 061119, (2012)
- M. Gross, F. Varnik.
Spreading dynamics of nanodrops: A lattice Boltzmann study, International Journal of Modern Physics C, 25, 7, (2012)
- M. Gross, F. Varnik.
Simulation of static critical phenomena in nonideal fluids with the Lattice Boltzmann method, Physical Review E, 85, 056707, (2012)
- S. Mandal, M. Gross, D. Raabe, F. Varnik.
Heterogeneous shear in hard sphere glasses, Physical Review Letters, APS, 108, 098301, (2012)
- N. Moradi, F. Varnik, I. Steinbach.
Contact angle dependence of the velocity of sliding cylindrical drop on flat substrates, Europhysics Letters, 95, 44003, (2011)
- T. Krüger, F. Varnik, D. Raabe.
Particle stress in suspensions of soft objects, Philosophical Transactions of The Royal Society A, 13, 2414-2421, (2011)
- M. Gross, R. Adhikari, M. E. Cates, F. Varnik.
Modelling thermal fluctuations in non-ideal fluids with the lattice Boltzmann method, Philosophical Transactions of The Royal Society A, 13, 2274–2282, (2011)
- N. Moradi, M. Gross, F. Varnik, G. Zikos et al.
Morphologies of small droplets on patterned hydrophobic substrates, Modelling and Simulation in Materials Science and Engineering, 19, 45005, (2011)
- P. Uhlmann, F. Varnik, P. Truman, G. Zikos et al.
Microfluidic emulsion separation-simultaneous separation and sensing by multilayer nanofilm structures, Journal of Physics: Condensed Matter, 23, 184123, (2011)
- P. Müller-Buschbaum, D. Magerl, R. Hengstler, J.-F. Moulin et al.
Structure and flow of droplets on solid surfaces, Journal of Physics: Condensed Matter, IOP Publishing, 23, 184111, (2011)
- F. Varnik, M. Gross, N. Moradi, G. Zikos et al.
Stability and dynamics of droplets on patterned substrates: insights from experiments and lattice Boltzmann simulations, Journal of Physics: Condensed Matter, Journal of Physics, 23, 184112, (2011)
- M. Gross, M. E. Cates, F. Varnik, R. Adhikari.
Langevin theory of fluctuations in the discrete Boltzmann equation, Journal of Statistical Mechanics: Theory and Experiment, 03, 1742-5468, (2011)
- S. G. Ayodele, F. Varnik, D. Raabe.
Lattice Boltzmann study of pattern formation in reaction-diffusion systems, Physical Review E, 83, 14, (2011)
- M. Gross, N. Moradi, G. Zikos, F. Varnik.
Shear stress in nonideal fluid lattice Boltzmann simulations, Physical Review E, 83, 17701, (2011)
- M. Gross, R. Adhikari, M. E. Cates, F. Varnik.
Thermal fluctuations in the lattice Boltzmann method for nonideal fluids, Physical Review E, 82, 056714, (2010)
- T. Krüger, F. Varnik, D. Raabe.
Second-order convergence of the deviatoric stress tensor in the standard Bhatnagar-Gross-Krook lattice Boltzmann method, Physical Review E, 82, 025701, (2010)
- M. Gross, F. Varnik, D. Raabe, I. Steinbach.
Small droplets on superhydrophobic substrates, Physical Review E, 81, 051606, (2010)
- N. Moradi, F. Varnik, I. Steinbach.
Roughness-gradient-induced spontaneous motion of droplets on hydrophobic surfaces: A lattice Boltzmann study, Europhysics Letters, 89, 26006, (2010)
- S. Ayodele, F. Varnik, D. Raabe.
Transverse diffusive mixing of solutes in pressure driven microchannels: a Lattice Boltzmann study of the scaling laws, La Houille Blanche, International Water Journal, 6, 93 - 100, (2009)
- M. Gross, F. Varnik, D. Raabe.
Fall and rise of small droplets on rough hydrophobic substrates, Europhysics Letters, 88, 26002, 1-6, (2009)
- F. Varnik, K. Binder.
Multiscale modelling of polymers at interfaces, International Journal of Materials Research, Hanser, 100, 1494-1502, (2009)
- F. Varnik, D. Raabe.
Can microscale wall roughness trigger unsteady/chaotic flows?, American Institute of Physics, 5th International Workshop on Complex Systems, 982, 626-632, (2008)
- F. Varnik, P. Truman, B. Wu, P. Uhlmann et al.
Wetting gradient induced separation of emulsions: A combined experimental and lattice Boltzmann computer simulation study, Physics of Fluids, American Institute of Physics, 20, 072104, 1-14, (2008)
- F. Varnik, D. Raabe.
Profile blunting and flow blockage in a yield stress fluid: A molecular dynamics study, Physical Review E, The American Physical Society, 77, 011504, 1-9, (2008)
- F. Varnik.
Diffusion, structural relaxation and rheological properties of a simple glass forming model : A molecular dynamics study, 5th International Workshop on Complex Systems, American Institute of Physics, 982, 160-168, (2007)
- F. Varnik, D. Raabe.
Chaotic flows in microchannels : A lattice Boltzmann study, Molecular Simulation, 33, 583-587, (2007)
- F. Varnik, D. Dorner, D. Raabe.
Roughness-induced flow instability : A lattice Boltzmann study, Journal of Fluid Mechanics, 573, 191, (2007)
- F. Varnik, D. Raabe.
Microscale fluid flow at rough metallic surfaces : A lattice Boltzmann study, Proceedings of 2006 ASME Pressure Vessels and Piping Division Conference, PVP2006-ICPVT11, (2006)
- F. Varnik, D. Raabe.
Scaling effects in microscale fluid flow at rough solid surfaces, Modelling and Simulation in Materials Science and Engineering, 14, 857, (2006)
- F. Varnik, O. Henrich.
Yield stress discontinuity in a simple glass, Physical Review B, 73, 174209, (2006)
- F. Varnik.
Structural relaxation and rheological response of a driven amorphous system, Journal of Chemical Physics, 125, 164514, (2006)
- J. Baschnagel, F. Varnik.
Computer simulations of supercooled polymer melts in the bulk and in confined geometry, Journal of Physics: Condensed Matter, 17, R851, (2005)
- O. Henrich, F. Varnik, M. Fuchs.
Dynamic yield stresses of glasses : asymptotic formulae, Journal of Physics: Condensed Matter, 17, 1, (2005)
- K. Binder, J. Horbach, W. Kob, W. Paul et al.
Molecular dynamics simulations, Journal of Physics: Condensed Matter, 16, S429 -S453, (2004)
- F. Varnik, L. Bocquet, L.-J. Barrat.
Stress fluctuations, static yield stress and shear banding in a flowing Lennard-Jones glass, SPIE proceedings on Fluctuation and Noise in Materials, 5469, 209, (2004)
- F. Varnik, L. Bocquet, L.-J. Barrat.
A study of the static yield stress in a binary Lennard-Jones glass, Journal of Chemical Physics, 120, 2788, (2004)
- J. Baschnagel, H. Meyer, F. Varnik, S. Metzger et al.
Computer simulations of polymers close to solid interfaces : Some selected topics, Interface Science : Polymers at Interfaces, 11, 159-173 , (2003)
- K. Binder, J. Horbach, W. Kob, F. Varnik.
Atomistic Simulation of Transport Phenomena in Simple and Complex Fluids and Fluid Mixtures, Interface and Transport Dynamics, Springer, 32, 226-248, (2003)
- F. Varnik, L. Bocquet, L.-J. Barrat, L. Berthier.
Shear localization in a model glass, Physical Review Letters, 90, 095702 , (2003)
- F. Varnik, J. Baschnagel, K. Binder, M. Mareschal.
Confinement effects on the slow dynamics of a supercooled polymer melt: Rouse modes and the incoherent scattering function, The European Physical Journal E, 12, 167, (2003)
- F. Varnik, J. Baschnagel, K. Binder.
Glassy dynamics in thin polymer films : Recent MD results, Journal of Non-Crystalline Solids, 307-310, 524, (2002)
- F. Varnik, J. Baschnagel, K. Binder.
Glass transition in thin polymer films : A molecular dynamics study, International Journal of Modern Physics C, 13, 799 , (2002)
- F. Varnik, J. Baschnagel, K. Binder.
Reduction of the glass transition temperature in polymer films : A molecular dynamics study, Physical Review E, 65, 021507 , (2002)
- F. Varnik, J. Baschnagel, K. Binder.
Static and dynamic properties of supercooled thin polymer films, The European Physical Journal E, 8, 175, (2002)
- F. Varnik.
Simulation of planar systems at constant normal pressure : Is it also possible to keep the plate separation constant?, Computer Physics Communications, 149, 61, (2002)
- J. Buchholz, W. Paul, F. Varnik, K. Binder.
Cooling rate dependence of the glass transition temperature of polymer melts : a Molecular Dynamics study, Journal of Chemical Physics, 117, 7364, (2002)
- F. Varnik, K. Binder.
Shear viscosity of a supercooled polymer melt via non equilibrium molecular dynamics simulations, Journal of Chemical Physics, 117, 6336 , (2002)
- F. Varnik, P. Scheidler, J. Baschnagel, W. Kob et al.
Molecular dynamics simulation of confined glass forming liquids, Materials Research Society Symposium Proceedings, Mater. Res. Soc, Warrendale, PA, USA, 651, T3.1.1-T3.1.6, (2001)
- F. Varnik, J. Baschnagel, K. Binder.
Molecular dynamics of supercooled polymer films, Journal de Physique IV France, 10, 239-242, (2000)
- F. Varnik, J. Baschnagel, K. Binder.
Molecular dynamics results on the pressure tensor of polymer films, Journal of Chemical Physics, 113, 4444-4453, (2000)
- R. Mästle, C. Schmitz, F. Varnik, A. Giesen.
Instruments and standard measurement procedures for laser beam characterization, Proceedings of 5-th Conference on Optics (ROMOPTO’97), 3405, 978, (1997)
- F. Varnik, R. Mästle, A. Giesen.
Measurement of moments for diffracted beams : Comparison with theory, Proceedings of 4th international workshop on Laser Beam and Optics Characterization (LBOC), (1997)
- 04.12.2022Chemically triggered shape memory polymers: molecular modelling and experimentsFathollah Varnik
Advanced Materials Discussion Series at Shiraz University, Iran
- 03.10.2022Effects of additive molecules on shape memory effect in polymers: a combined experimental and computer simulation studyFathollah Varnik, Hakan Dumlu, Elias Mahmoudinezhad Zirdehi, Gunther Eggeler
Tenth Multiscale Materials Modelling Conference (MMM10) 2022, Baltimore, Maryland, USA
- 13.09.2019Modelling shape memory polymers: from molecular understanding towards engineering applicationsFathollah Varnik
Covestro Deutschland AG, Leverkusen, Germany
- 22.03.2017Plastic deformation in amorphous solids: The role of elasticity and spatio-temporal correlations of fluctuationsFathollah Varnik
DPG Spring Meeting, Dresden, Germany
- 16.02.2017Shear localization in amorphous solids: The role of structure and long range spatio-temporal correlations of fluctuationsFathollah Varnik
Bridging the Scales in Glasses II, University of Mainz, Mainz, Germany
- 16.01.2017Jamming and shear driven fluctuations in suspensions of non-Brownian deformable particlesFathollah Varnik
Theoriekolloquium, Department of Physics, University of Konstanz, Germany
- 08.06.2016Viscosity, yield stress and shear-induced diffusion in dense suspensions of non-Brownian deformable particlesFathollah Varnik
Faculty of Physics, Technical University of Dortmund, Germany.
- 07.03.2016Flow and its fluctuations in dense particulate suspensions: From molecular dynamics towards a hydrodynamic theoryFathollah Varnik
Flowing Matter - COST Action MP1305, Lecce, Italy
- 11.11.2015Fluctuating non-ideal fluid lattice Boltzmann method: a route to bridge the gap between nano- and mesoscale modeling of fluidsFathollah Varnik
Institute of Mathematics, University of Düsseldorf, Germany
- 13.10.2015Plasticity in amorphous solids: how far are we from a predictive theory?Fathollah Varnik
Colloquium Talk, Institute of Material Physics, University of Münster
- 22.09.2015Rheology, diffusion and correlations in dense suspensions of deformable particlesFathollah Varnik
Particle Simulations 2015, Erlangen, Germany
- 05.05.2015Non monotonic effect of confinement on the structure and dynamics of hard sphere colloidsFathollah Varnik
Kinetik Seminar, University of Bayreuth, Germany
- 07.07.2014Relating shear-induced diffusion to the rheology of dense suspensions of model red blood cellsFathollah Varnik
Institute for Theoretical Physics II, University of Düsseldorf
- 27.05.2014Rheology and diffusion in athermal suspensions of deformable particlesFathollah Varnik
Institute of Physics, University of Mainz
- 20.05.2014Microscopic mechanisms governing rheology and shear-induced diffusion in suspensions of red blood cellsFathollah Varnik
CNRS - Solvay, Lyon, France
- 08.03.2014The fluctuating non-ideal fluid lattice Boltzmann method: theory and applicationFathollah Varnik
5th International Conference on Nanostructures, Kish Island, Iran
- 05.12.2013The fluctuating Lattice Boltzmann method for non-ideal fluids: Theory and applicationFathollah Varnik
City College, New York, USA
- 04.12.2013Bridging the gap between the nano-and mesoscales: The fl uctuating lattice Boltzmann method for non-ideal fluidsFathollah Varnik
MRS Meeting 2013, Boston, USA
- 23.10.2013Complex dynamic behavior in the flow of sheared amorphous materialsFathollah Varnik
Theorie Kolloquium und Hauptseminar Aktuelle Probleme der Theoretischen Physik, Universität Duisburg-Essen, Essen, Germany
- 09.10.2013Effect of substrate topography on adhesion properties of polymer coatingsDhiraj Kumar Mahajan, Fathollah Varnik, Alexander Hartmaier
Sitzung DGM-Fachausschuss „Hybride Werkstoffe und Strukturen“, Kaiserslautern, Germany
- 21.07.2013Dynamic yielding and non-linear rheology of a binary Lennard-Jones modelFathollah Varnik
The 7th International Discussion Meeting on Relaxations in Complex Systems, Barcelona, Spain
- 16.05.2013Thermal fl uctuations in non-ideal fl uid Lattice Boltzmann simulations: Theory and applicationsFathollah Varnik
ERC School-Workshop Multiphase Physics at the micro- and nanoscales, University of Rome, Rome, Italy
- 08.01.2013Nonlinear rheology and heterogeneous flow in complex fluidsFathollah Varnik
Institut for Theoretical Physics, University of Göttingen, Göttingen, Germany
- 10.10.2012Non-linear and heterogeneous response of glassy materialsFathollah Varnik, Suvendu Mandal, Markus Gross
National Symposium on Materials & Processing - 2012 (MAP-2012), Mumbai, India
- 24.07.2012New developments in lattice Boltzmann modelling of complex fluids: from surface roughening, critical phenomena to suspensions of red blood cellsFathollah Varnik
21st International Conference on Discrete Simulation of Fluid Dynamics (DSFD), The LaLiT Ashok, Bangalore, India
- 19.07.2012Reentrant glass transitions in confined hard-sphere glassesSuvendu Mandal, Dierk Raabe, Fathollah Varnik
Bridging the Scales in Glasses, Heinrich-Heine-Universität, Düsseldorf, Germany
- 18.07.2012Flow heterogeneity in hard-sphere glasses: connecting MD studies with lattice Boltzmann simulationsSegun G. Ayodele, Dierk Raabe, Fathollah Varnik
Bridging the Scales in Glasses, Heinrich-Heine-Universität, Düsseldorf, Germany
- 08.01.2012Die Magie der Lotusblume: Neue Materialen für den AlltagFathollah Varnik
Ringvorlesung "MATERIALS 4 U", Deutsches Bergbaumuseum, Bochum, Germany
- 05.07.2011Lattice Boltzmann simulations of foamsDmitry Medvedev, Georgios Zikos, Fathollah Varnik
8th International Conference on Mesoscopic Methods in Engineering and Science (ICMMES) 2011, Lyon, France
- 04.07.2011Flow heterogeneity and correlations in a hard sphere model glassFathollah Varnik
CECAM Workshop on multiscale modelling of amorphous materials: from structure to mechanical properties, Dublin, Ireland
- 14.02.2011Theory and computer simulation of complex fluidsFathollah Varnik
Multiscale fluid dynamics with the Lattice Boltzmann method, Lorentz Center, Leiden, Netherlands
- 18.01.2011Computer simulation of complex fluids: from droplets to soft glassesFathollah Varnik
University of Erlangen-Nürnberg, Erlangen, Germany
- 02.09.2009Nano-confined polymer melts: purely geometric effects versus substrate structureFathollah Varnik
NCTAM - The 11th National Congress on Theoretical and Applied Mechanics, Sofia, Bulgaria
- 02.07.2009Superhydrophobicity and self-cleaning: behaviour of droplets as small as roughness scale and self-cleaningFathollah Varnik, Markus Gross
Departement of Solid State Physics, Ulm University, Germany
- 30.06.2009The generic nature of finite size driven droplet evaporation: evidence from Lattice Boltzmann and analytic studies of a Cahn-Hilliard free energy modelFathollah Varnik
Physics Department, Johannes Gutenberg-Universität, Mainz, Germany
- 10.03.2009Fascinating world of small droplets: how simple models may describe a rich phenomenologyFathollah Varnik, Ingo Steinbach, Markus Gross
IWoM3 - International Workshop on Multiscale Materials Modelling, Berlin, Germany
- 18.09.2008Stability of small droplets: Finite size driven instability and droplets on superhydrophobic substratesFathollah Varnik, Markus Gross, Dierk Raabe
TU München, Germany
- 14.09.2021Lattice Boltzmann simulations of reacting flows in small-scale static and moving beds of particles with complex shapesReza Namdar, Fathollah Varnik
CRC-TRR 287 Workshop 2022, Hannover, Germany
- 24.03.2021Decelerated aging in metallic glasses by low temperature thermal cyclingFathollah Varnik
Online-Tagung der Deutschen Physikalischen Gesellschaft
- 15.01.2020Chemo-mechanical and chemo-thermal coupling in shape memory polymers: how computer simulations meet experimentsFathollah Varnik, Gunther Eggeler
2020 Online-Conference WCCM-ECCOMAS 2020 (originally planned for Paris), online
- 26.06.2018Blessing and curse of amorphous solids: State of the art and perspectivesFathollah Varnik
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 25.06.2018Correlation of strain fluctuations in 3D glass and supercooled liquidMuhammad Reza Hassani, Fathollah Varnik
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 25.06.2018Shape-memory effect in polymers containing small moleculesElias Mahmoudinezhad Zirdehi, Fathollah Varnik
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 25.06.2018Phase-field Lattice-Boltzmann simulation of complex fluidsSamad Vakili, Fathollah Varnik
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 13.06.2018On the numerical evaluation of local curvature for diffuse interface models of microstructure evolutionSamad Vakili, Ingo Steinbach, Fathollah Varnik
International Conference on Computational Science, 2017, Zürich, Switzerland
- 22.09.2017Effect of solubility and capillarity driven kinetics on sintered microstructure of WC-Co alloysRaphael Schiedung, Marvin Tegeler, Fathollah Varnik
EUROMAT 2017, Thessaloniki, Greece
- 26.07.2017Effect of melt flow on dendritic solidification: A phase-field studyAlexander Monas, Oleg Shchyglo, Fathollah Varnik, Ingo Steinbach
6th Decennial International Conference on Solidification Processing, Beaumont Estate, Old Windsor, UK
- 20.03.2017Curvature induced stress and phase-boundary diffusionRaphael Schiedung, Reza Darvishi Kamachali, Ingo Steinbach, Fathollah Varnik
DPG Spring Meeting, Dresden, Germany
- 09.10.2016Shear banding in amorphous solids: The role of heterogeneity in structure and force distributionMuhammad Reza Hassani, Fathollah Varnik
8th International Conference on Multiscale Materials Modeling, Dijon, France
- 28.09.2016Chemo-mechanical coupling in shape memory polymers: Theory versus experimentElias Mahmoudinezhad Zirdehi, Fathollah Varnik
MSE 2016: Materials Science and Engineering Congress, Darmstadt, Germany
- 26.09.2016From glass to supercooled liquid: Long-range correlation of shear strain persistsMuhammad Reza Hassani, Dierk Raabe, Fathollah Varnik
3rd International Workshop on Nonlinear Response in Complex Matter, Primošten, Croatia
- 27.09.2016The role of stress and structure fluctuations for plastic responseFathollah Varnik
3rd International Workshop on Nonlinear Response in Complex Matter, Primošten, Croatia
- 20.06.2016Plasticity in amorphous solids: Local heterogeneity and localization of plastic deformationsMuhammad Reza Hassani, Dierk Raabe, Fathollah Varnik
Workshop on Hybrid Simulation Methods in Fluid Dynamics: Models, Software and Application, Garching, Germany
- 30.05.2016Scale bridging modelling of complex fluids: From nano-scale flow to suspension rheologyFathollah Varnik
Materials Chain International Conference 2016, Bochum, Germany
- 24.09.2015Modelling the flow in diffuse interface methods of solidificationAmol Bhagwan Subhedar, Fathollah Varnik, Ingo Steinbach
Euromat 2015, Warsaw, Poland
- 05.05.2015Sensitivity of the correlation plastic rearrangements to the microscopic dynamics in sheared disordered solidsMuhammad Reza Hassani, Dierk Raabe, Fathollah Varnik
International Workshop on Dynamics in Viscous Liquids, Montpellier, France
- 05.05.2015Non-locality of effective temperature in a shear driven model glassFathollah Varnik, Dierk Raabe
International Workshop on Dynamics in Viscous Liquids, Montpellier, France
- 04.05.2015Correlation of motion and diffusion in sheared athermal suspensions of deformable particlesFathollah Varnik
International Workshop on Dynamics in Viscous Liquids, Montpellier, France
- 27.11.2013Morphology evolution during electrodeposition from ionic liquids: a scale-bridging approachUlrich Preiss, Fathollah Varnik
MPG-CPFS Conference, Dresden, Germany
- 18.11.2013The Lattice Boltzmann method and its applications in microstructure evolutionFathollah Varnik
Sitzung des Fachausschusses Computersimulation der DGM, Methoden der Gefügesimulation, Ruhr-Universität Bochum, Bochum, Germany
- 05.11.2013Shear banding in amorphous solidsFathollah Varnik
Materials Day 2013, Ruhr-Universität Bochum, Bochum, Germany
- 10.09.2013Surface roughness effect on static, dynamic and mechanical properties of polymers at interfacesDhiraj Kumar Mahajan, Fathollah Varnik, Alexander Hartmaier
3rd International Conference on Material Modelling (ICMM), Warsaw, Poland
- 26.07.2013Effect of substrate topography on adhesion properties of polymer coatingsDhiraj Kumar Mahajan, Fathollah Varnik, Alexander Hartmaier
7th International Discussion Meeting on Relaxation in Complex Systems, Barcelona, Spain
- 07.05.2013Multiscale modelling of solidification phenomena: the coupled phase field-fluctuating lattice Boltzmann methodOleg Shchyglo, Markus Gross, Ingo Steinbach, Fathollah Varnik
ICAMS² 2013, International Colloquium on Advanced Materials Simulation, Bochum, Germany
- 06.05.2013Polymer/substrate interfaces: simulation of structure, properties and behaviourDhiraj Kumar Mahajan, Anatoly Berezkin, Ulrich P. Biedermann, Fathollah Varnik, Alexander Hartmaier
ICAMS² 2013, International Colloquium on Advanced Materials Simulation, Bochum, Germany
- 06.03.2013Combined phase field - Lattice Boltzmann simulation of dendritic solidification with fluid flow and solid particle motionDmitry Medvedev, Oleg Shchyglo, Fathollah Varnik, Ingo Steinbach
TMS 2013, San Antonio, USA
- 14.11.2012Effect of substrate topography on mechanical properties of glassy polymer coatingsDhiraj Kumar Mahajan, Fathollah Varnik, Alexander Hartmaier
ADGLASS Workshop 2012, Bremen, Germany
- 18.10.2012Effect of surface roughness on cohesive bonding of polymer-solid interfacesDhiraj Kumar Mahajan, Fathollah Varnik, Alexander Hartmaier
MMM 2012 - 6th International Conference on Multiscale Materials Modeling, Biopolis, Singapore
- 20.07.2012Time evolution of elementary structural events in amorphous materialsNima Hamidi Siboni, Dierk Raabe, Fathollah Varnik
Bridging the Scales in Glasses, Heinrich-Heine-Universität, Düsseldorf, Germany
- 30.03.2012Critical phenomena in an isothermal compressible fluid – a lattice Boltzmann studyMarkus Gross, Fathollah Varnik
DPG Spring Meeting 2012, Berlin, Germany
- 29.03.2012Simulation of critical phenomena in fluids with the lattice Boltzmann methodMarkus Gross, Fathollah Varnik
DPG Spring Meeting 2012, Berlin, Germany
- 28.03.2012Dynamics of small droplets on solid surfacesNasrollah Moradi, Fathollah Varnik, Ingo Steinbach
DPG Spring Meeting 2012, Berlin, Germany
- 27.03.2012Phase diagram of confined hard-sphere glassesSuvendu Mandal, Dierk Raabe, Fathollah Varnik
DPG Spring Meeting 2012, Berlin, Germany
- 27.03.2012Aging and elementary relaxation processes in amorphous solidsNima Hamidi Siboni, Dierk Raabe, Fathollah Varnik
DPG Spring Meeting 2012, Berlin, Germany
- 26.03.2012An interface dissipation phase-field model for electrochemistryFathollah Varnik, Suvendu Mandal, Dierk Raabe
DPG Spring Meeting 2012, Berlin, Germany
- 19.03.2012Flow heterogeneity in hard-sphere glasses: the fluid dynamical modelSegun G. Ayodele, Dierk Raabe, Fathollah Varnik
The international discussion meeting: Statistical Mechanics: Interplay of Theory and Computer Simulations, Johannes Gutenberg-Universität, Mainz, Germany
- 19.03.2012Reentrant glass transitions in confined hard-sphere glassesSuvendu Mandal, Dierk Raabe, Fathollah Varnik
The international discussion meeting: Statistical Mechanics: Interplay of Theory and Computer Simulations, Johannes Gutenberg-Universität, Mainz, Germany
- 19.03.2012Critical dynamics of an isothermal non-ideal fluidMarkus Gross, Fathollah Varnik
The international discussion meeting: Statistical Mechanics: Interplay of Theory and Computer Simulations, Johannes Gutenberg-Universität, Mainz, Germany
- 14.09.2011Simulation of sintering process by combined phase-field and lattice Boltzmann simulationAlfredo Gerardo Rios Nogues, Markus Gross, Fathollah Varnik, Ingo Steinbach
EUROMAT 2011 - European Congress on Advanced Materials and Processes, Montpellier, France
- 08.08.2011Study of critical fluctuations via a fluctuating lattice Boltzmann method for non-ideal fluidsMarkus Gross, Fathollah Varnik
20th International Conference on Discrete Simulation of Fluid Dynamics (DSFS 2011), Fargo, USA
- 08.08.2011A discrete Boltzmann route to thermal fluctuations in LB models for non-ideal fluidsMarkus Gross, Ronojoy Adhikari, Mike E. Cates, Fathollah Varnik
20th International Conference on Discrete Simulation of Fluid Dynamics (DSFS 2011), Fargo, USA
- 08.08.2011Lattice Boltzmann study of pattern formation in a convective-reaction-diffusion modelSegun G. Ayodele, Fathollah Varnik, Dierk Raabe
20th International Conference on Discrete Simulation of Fluid Dynamics (DSFS 2011), Fargo, USA
- 08.08.2011Dynamic of droplets on flat substrates: lattice Boltzmann method versus analytic modelsNasrollah Moradi, Fathollah Varnik, Ingo Steinbach
20th International Conference on Discrete Simulation of Fluid Dynamics (DSFS 2011), Fargo, USA
- 08.08.2011Collective phenomena in dense suspensions of red blood cells under shear fluctuations via a fluctuating lattice Boltzmann method for non-ideal fluidsTimm Krüger, Fathollah Varnik, Dierk Raabe
20th International Conference on Discrete Simulation of Fluid Dynamics (DSFS 2011), Fargo, USA
- 10.03.2009Simulating red blood cells: a combined lattice Boltzmann and immersed boundary approachFathollah Varnik
IWoM3 - International Workshop on Multiscale Materials Modelling, Berlin, Germany
- 30.08.2009Fall and rise of droplets on rough hydrophobic substratesFathollah Varnik, Ingo Steinbach, Markus Gross
PF09 - 2nd Symposium on Phase-Field Modelling in Material Science and Engineering, Rolduc Abbey, Kerkrade, Netherlands
- 13.07.2009Convergence behaviour of shear stress in the lattice Boltzmann method: analytical estimates versus numerical simulationsFathollah Varnik, Ingo Steinbach
ICMMES 2009 - The Sixth International Conference for Mesoscopic Methods in Engineering and Science, Guangzhou, China
- 13.07.2009Hemorheology and statistical properties of bloodFathollah Varnik, Ingo Steinbach
ICMMES 2009 - The Sixth International Conference for Mesoscopic Methods in Engineering and Science, Guangzhou, China
- 13.07.2009Analytic and lattice Boltzmann studies of droplets on patterned hydrophobic surfacesFathollah Varnik, Ingo Steinbach, Markus Gross
ICMMES 2009 - The Sixth International Conference for Mesoscopic Methods in Engineering and Science, Guangzhou, China
- 13.07.2009Simulation of a dense suspension of deformable particles using the lattice Boltzmann methodFathollah Varnik, Ingo Steinbach
ICMMES 2009 - The Sixth International Conference for Mesoscopic Methods in Engineering and Science, Guangzhou, China
- 24.05.2009Droplets on patterned hydrophobic surfaces: a lattice Boltzmann studyFathollah Varnik, Ingo Steinbach, Markus Gross
EUROTHERM - Seminar Nr. 84, Namur, Belgium
- 24.05.2009Superhydrophobicity: when droplet sizes are comparable to roughness scaleFathollah Varnik, Ingo Steinbach, Markus Gross
EUROTHERM - Seminar Nr. 84, Namur, Belgium
- 26.03.2009Lattic Boltzmann studies of finite size driven droplet evaporation and droplet dynamicsFathollah Varnik, Markus Gross, Dierk Raabe, Ingo Steinbach
DPG Spring Meeting 2009, Dresden, Germany
- 24.03.2009Stability of small droplets on superhydrophobic surfacesFathollah Varnik, Markus Gross, Dierk Raabe, Ingo Steinbach
DPG Spring Meeting 2009, Dresden, Germany
- 10.03.2009Stability and dynamics of dropletsFathollah Varnik, Ingo Steinbach, Markus Gross
IWoM3 - International Workshop on Multiscale Materials Modelling, Berlin, Germany
- 09.03.2009Polymers at metallic interfacesFathollah Varnik
Werkzeuge in Industrie und Wissenschaft - Modellierung/Simulation/Berechnung, ICAMS Advanced Discussion, Bochum, Germany
- 26.01.2009Thermodynamics of small droplets on hydrophobic substrates: Theory versus Lattice Boltzmann simulationsFathollah Varnik
ICAMS, Ruhr-Universität Bochum, Germany
- 08.12.2008Polymer-metal interfaces: study of early stages of coating dynamics via mesoscopic computer simulationsFathollah Varnik
ICAMS-Workshop
- 25.11.2008Heterogeneous dynamics of a simple glass under shearIngo Steinbach, Fathollah Varnik
UCGP2008 - Unifying Concepts in Glass Physics IV, Kyoto, Japan
- 28.11.2008Response of a driven model glass and the Stokes-Einstein relationFathollah Varnik, Ingo Steinbach, Dierk Raabe
UCGP2008 - Unifying Concepts in Glass Physics IV, Kyoto, Japen
Professional Experience
Since 2008
Research group leader at ICAMS
2006-2008
Head of the group Computer Simulation of Complex Fluids, Max-Planck Institute for Iron Research, Düsseldorf, Germany
2004-2006
Project leader,Max-Planck Institute for Iron Research, Düsseldorf, Germany
2002-2004
Postdoc, CECAM and ENS-Lyon, France
2001-2002
Postdoc, University of Mainz, Germany
Education
Habilitation in physics, RWTH-Aachen, Germany
Ph.D. in physics, Johannes Gutenberg University,Mainz, Germany
Study of physics, University of Cologne, Germany
