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Just another WordPress site - Ruhr-Universität Bochum

conference

Critical phenomena in an isothermal compressible fluid – a lattice Boltzmann study

Markus Gross, Ruhr-Universität Bochum, Bochum, Germany

Fathollah Varnik, Ruhr-Universität Bochum, Bochum, Germany

Time & Place
  • Date: 30.03.2012
  • Time: 12:30 p.m.
  • Place: DPG Spring Meeting 2012, Berlin, Germany

Abstract

Recently, thermal fluctuations have been introduced into the Lattice Boltzmann method for non-ideal fluids, allowing one to numerically solve the fluctuating Navier-Stokes equations for an isothermal liquid-vapor system. Here, it is demonstrated that the method, employing a Ginzburg-Landau free energy functional, correctly reproduces the static critical behavior associated with the Ising universality class. A particular focus will be on finite-size effects and issues related to the global conservation of the order-parameter. Additionally, the critical behavior of the transport coefficients (speed of sound, shear and bulk viscosity) of the model, which describes an isothermal compressible fluid, is discussed.

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