Scale-Bridging Thermodynamic and Kinetic Simulation (STKS)
Massively parallel multiphase field simulations
PhD Thesis, Ruhr-Universität Bochum (2017)
The multiphase field method is a commonly used tool to simulate the evolution of microstructure during materials processing. Even when using a concept called active parameter tracking, which substantially reduces the computational complexity, the resource demands of the multiphase field method remain significant in both time and memory. A hybrid-parallelization is presented and two different load-balancing schemes are described and compared. Results are presented for performance benchmarks as well as for a variety of applications, including grain growth in polycrystalline materials with hundreds of thousands of different phase fields and Mg-Al alloy solidification. In addition a way of utilizing the multiphase field method is shown that allows the construction of microstructures with a given grain size distribution.