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SUMMARY:Numerical simulation of atmospheric boundary layer turbulence on H
 PC systems
DTSTART;VALUE=DATE-TIME:20231206T100000Z
DTEND;VALUE=DATE-TIME:20231206T101500Z
DTSTAMP;VALUE=DATE-TIME:20260813T235825Z
UID:indico-contribution-1912@events.chpc.ac.za
DESCRIPTION:Speakers: Evgeny Mortikov (Lomonosov Moscow State University)\
 nWe discuss the development of the unified framework for the numerical sim
 ulation of the atmospheric boundary layer turbulence. The model developed 
 at the Lomonosov Moscow State University combines DNS (Direct Numerical Si
 mulation)\, LES (Large-Eddy Simulation) and RANS (Reynolds-Averaged Navier
 -Stokes) approaches for turbulence modelling and allows high-resolution si
 mulations on HPC systems by using MPI\, OpenMP and CUDA. The code is struc
 tured in a such way as to separate the solution of high-level “numerical
 ” and “physical” problems from the code related to parallelization o
 r low-level algorithm optimization highly dependent on the computational a
 rchitecture. The principal advantage of such separation is the ability to 
 tune the code for different architectures without modifying the high-level
  and problem specific part of the code. The efficiency of the model implem
 entation and the challenges of using heterogeneous architecture of modern 
 HPC are discussed. A particular emphasis is placed on the code optimizatio
 ns relevant for problems of aerosol and chemistry transport in urban envir
 onment.  We show how the DNS- and LES- simulations may be used to improve 
 current boundary-layer processes parameterizations used in Earth system mo
 dels.\n\nhttps://events.chpc.ac.za/event/125/contributions/1912/
LOCATION:Skukuza 1-1-2 - Ndau
URL:https://events.chpc.ac.za/event/125/contributions/1912/
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