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DTSTAMP:20210916T132451Z
LOCATION:Louis Favre
DTSTART;TZID=Europe/Stockholm:20210707T123000
DTEND;TZID=Europe/Stockholm:20210707T130000
UID:submissions.pasc-conference.org_PASC21_sess141_msa178@linklings.com
SUMMARY:High-Resolution Numerical Simulation of Biot's Poroelastic Equatio
 ns Using Multiple GPUs
DESCRIPTION:Minisymposium\n\nHigh-Resolution Numerical Simulation of Biot'
 s Poroelastic Equations Using Multiple GPUs\n\nAlkhimenkov, Khakimova, Räs
 s, Quintal, Podladchikov\n\nBiot’s theory describes the coupled soli
 d-fluid deformation in a porous medium. This theory can be used to model f
 ractured media, induced seismicity, etc. The dynamic response of an isotro
 pic two phase media results in two longitudinal waves (fast and slow) and 
 one shear wave. Depending on the medium's properties, the slow wave may pr
 opagate as a longitudinal wave, or it may diffuse and attenuate quickly. S
 everal aspects of Biot's equations are explored, namely, the isotropic and
  anisotropic poroelastic wave propagation, fluid diffusion, non-dimensiona
 l analysis and numerical stability. We solve the Biot’s equations fo
 r particle velocity and stress in the time domain in 3D. The resulting cod
 e is implemented on CUDA-C programming language, which is suitable for GPU
  devices. We rely on MPI to execute the code on multiple graphical process
 ing units. The resolution of our numerical simulations in 3D is more than 
 one billion grid cells which can capture very complex and heterogeneous st
 ructures. We achieve a weak scaling parallel efficiency of 98 percent amon
 g 8 NVIDIA Volta GPUs. We show benchmarks confirming the numerical efficie
 ncy and accuracy of our code.\n\nDomain: CS and Math, Solid Earth Dynamics
 , Engineering
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