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LOCATION:Rio Room
DTSTART;TZID=Europe/Stockholm:20220628T110000
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UID:submissions.pasc-conference.org_PASC22_sess144_msa196@linklings.com
SUMMARY:Multi-GPU LBM-FEM Solver for Cell-Level Blood Simulations
DESCRIPTION:Minisymposium\n\nMulti-GPU LBM-FEM Solver for Cell-Level Blood
  Simulations\n\nLatt, Chopard, Kotsalos, Beny, Zouaoui Boudjeltia\n\nWe pr
 esent a massively parallel, GPU-based computational framework for the simu
 lation of blood flow with fully resolved constituents. The trajectories an
 d deformed state of blood cells such as red blood cells (RBCs) and platele
 ts (PLTs) are fully resolved as well as the complex interaction between th
 em. The approach combines a lattice Boltzmann solver for the simulation of
  blood plasma (fluid phase), a finite element method (FEM) solver for the 
 resolution of blood cells (solid phase), and an immersed boundary method (
 IBM) for the coupling of the two phases. A first, hybrid implementation, s
 olving the FEM problem with the GPU-based npFEM tool and the fluid problem
  with the CPU-based version of Palabos, led to massive parallel performanc
 e, but was slowed down by the CPU-GPU coupling. We now present an improvem
 ent of the solver which solves both the blood components (with npFEM) and 
 the blood plasma dynamics (with a LBM approach) on GPU using the CUDA lang
 uage. We further present a co-processing approach for data visualization w
 hich eliminates a bottleneck inherent to data evaluation during a massivel
 y parallel program execution. We finally present some simulation results o
 f this solver, applied to the development of platelet function tests.\n\nD
 omain: Engineering, Life Sciences
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