Poster 77: Extreme Scale Phase-Field Simulations of Sintering Processes

Authors: Johannes Hötzer (Karlsruhe University of Applied Sciences), Henrik Hierl (Karlsruhe University of Applied Sciences), Marco Seiz (Karlsruhe Institute of Technology), Andreas Reiter (Karlsruhe Institute of Technology), Britta Nestler (Karlsruhe Institute of Technology)

Abstract: The sintering process, which turns loose powders into dense materials, is naturally found in the formation of glaciers, but is also the indispensable process to manufacture ceramic materials. This process is described by a dynamically evolving microstructure, which largely influences the resulting material properties.

To investigate this complex three-dimensional, scale-bridging evolution in realistic domain sizes, a highly optimized and parallelized multiphysics phase-field solver is developed. The solver is optimized in a holistic way, from the application level over the time integration and parallelization, down to the hardware. Optimizations include communication hiding, explicit vectorization, implicit schemes, and local reduction of degrees of freedom.

With this, we are able to investigate large-scale, three-dimensional domains, and long integration times. We have achieved a single-core peak performance of 32.5%, scaled up to 98304 cores on Hazel Hen and SuperMUC-NG, and simulated a multimillion particle system.

Best Poster Finalist (BP): no

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