SCHEDULE: NOV 15-20, 2015

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Large-Scale and Massively Parallel Phase-Field Simulations of Pattern Formation in Ternary Eutectic Alloys

SESSION: Regular & ACM Student Research Competition Poster Reception

EVENT TYPE: Posters, Receptions, ACM Student Research Competition, Best Poster Finalist

EVENT TAG(S): HPC Beginner Friendly, Regular Poster

TIME: 5:15PM - 7:00PM

SESSION CHAIR(S): Michela Becchi, Manish Parashar, Dorian C. Arnold

AUTHOR(S):Johannes Hötzer, Martin Bauer, Marcus Jainta, Philipp Steinmetz, Marco Berghoff, Florian Schornbaum, Christian Godenschwager, Harald Köstler, Ulrich Rüde, Britta Nestler

ROOM:Level 4 - Lobby

ABSTRACT:

Various patterns form during directional solidification of ternary eutectic alloys.
These macroscopic patterns strongly influences the material properties.
To study the influence of the material and process parameters for a wide range of ternary alloys during solidification, simulations are conducted to gain new insights.
In this poster, we present the results of massive parallel phase-field simulations on up to 262144 cores, based on the HPC framework waLBerla.
Results of optimization techniques are shown, starting from the model up to the code level, including buffering strategies and vectorization.
The approach comprises systematic node level performance engineering and gains in a speedup of factor 80 compared to the original code.
Excellent weak scaling results on the currently largest German supercomputers, SuperMUC, Hornet and Juqueen, are presented.
Novel methods like principle component analysis and graph based approaches are applied to compare the computed microstructural patterns with experimental Al-Ag-Cu micrographs.

Chair/Author Details:

Michela Becchi, Manish Parashar, Dorian C. Arnold (Chair) - University of Missouri|Rutgers University|University of New Mexico|

Johannes Hötzer - Karlsruhe University of Applied Sciences

Martin Bauer - FAU Erlangen Nuremberg

Marcus Jainta - Karlsruhe Institute of Technology

Philipp Steinmetz - Karlsruhe Institute of Technology

Marco Berghoff - Karlsruhe Institute of Technology

Florian Schornbaum - FAU Erlangen Nuremberg

Christian Godenschwager - FAU Erlangen Nuremberg

Harald Köstler - FAU Erlangen Nuremberg

Ulrich Rüde - FAU Erlangen Nuremberg

Britta Nestler - Karlsruhe Institute of Technology

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