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UID:submissions.pasc-conference.org_PASC21_sess182_post129@linklings.com
SUMMARY:P14 - lbmpy: Fast and Flexible Multi-Phase Lattice Boltzmann Simul
 ations for High Density Ratios with Code Generation
DESCRIPTION:Poster\n\nP14 - lbmpy: Fast and Flexible Multi-Phase Lattice B
 oltzmann Simulations for High Density Ratios with Code Generation\n\nHolze
 r, Bauer, Rüde\n\nWe present a multiphase Lattice Boltzmann method based o
 n the conservative Allen Cahn model. This approach is suitable for high de
 nsity ratios and high Reynolds numbers. The code generation framework lbmp
 y is used to produce optimized code for CPUs and GPUs. A roofline analysis
  demonstrates the excellent efficiency of the generated GPU code. The resu
 lting single-GPU code can be integrated into the multiphysics framework wa
 LBerla to enable massively parallel simulations on very large domains. Sca
 ling experiments are conducted on the PizDaint supercomputer up to 2048 GP
 Us. Near-perfect scaling behavior can be demonstrated when additional stra
 tegies are implemented to hide communication. The standard bubble rise sce
 nario is used to validate the implementation. However, the parallel multi-
 GPU implementation enables simulations of much larger large scenarios with
  several hundred fully resolved bubbles.
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