Berlin 2008 – wissenschaftliches Programm

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SYMS: Symposium Modern developments in multiphysics materials simulations

SYMS 2: Modern developments in multiphysics materials simulations II - Poster (joined by SYEC posters)

SYMS 2.7: Poster

Donnerstag, 28. Februar 2008, 18:30–19:30, Poster F

Massive multi-phase-field simulations: An efficient algorithm to compute large grain systems in 3D — •Mathias Reichardt, Michael Selzer, and Britta Nestler — Institute of Computational Engineering, Karlsruhe University of Applied Sciences

In the last few years, there has been fast progress in phase-field simulations of microstructures. By the attempt of incorporating more and more physical effects, the complexity of the model formulations has become computationally extremely intense. The hardware requirements for conducting large scale simulations in reasonable time has increases in the same manner.

In applications to polycystalline materials such as grain growth and grain coarsening processes, it is necessary to run simulations with a large number of different order parameters. Recently, it has been discussed that the number of phase states simultaneously present at the same place is limited to approximately six in three space dimensions. By using this fact, we demonstate that it is possible to radically reduce memory requirement and computing time. This technique in combination with parallel algorithms on multiprocessor machines allows the 3D simulation of an unlimited number of grain orientations keeping memory and computation time constant. This is traced back to the fact, that there are several optimizations regarding data representation, quantity of numerical operations and data storage.