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HydrodynamicmodelingviaheterogeneousparallelcomputingondomesticCPU?GPUplatform
1,2,3
5
1,4
NANTongchao ,SHIRui ,YUChunshui
(1.NationalKeyLaboratoryofWaterDisasterPrevention,Nanjing 210024,China;
2.YangtzeInstituteforConservationandDevelopment,HohaiUniversity,Nanjing 210024,China;
3.KeyLaboratoryofHydrologic - CycleandHydrodynamic - SystemofMinistryofWaterResources,HohaiUniversity,Nanjing 210024,China;
4.NanjingHydraulicResearchInstitute,Nanjing 210029,China;5.BeijingYunluTechnologyLtd.,Beijing 100161,China)
Abstract:Hydrodynamicmodelshaveadvantagessuchasclearphysicalmeaning,highprecisionandreliability,
buttheyalsohavehighercomputationalrequirementsandmoreneedforcomputingpower.Giventherestlessinter
nationalenvironment,itisnecessarytodevelopa“multi - node,multi - GPU”heterogeneousparallelcomputing
schemebasedondomestically - producedCPU?GPUs.Thisstudydevelopeda“multi - node,multi - GPU”large -
scaledistributedhydrodynamicmodelonheterogeneousparallelcomputingplatformbasedondomestically - produced
devices ,forfastsolvingthetwo - dimensionalshallowwaterequationsatthewatershedscale.Throughthreeexam
plesofincreasingcomplexity,theaccuracy,parallelefficiency,andsimulationcapabilityoflarge - scalemodels
withhundredsofmillionsofgridswereinvestigated.Theresultsshowthattheproposedmodelcanaccuratelysimu
latethehydrodynamicprocessunderconditionssuchasdambreakandlarge - scalecomplexterrain ;theparallelac
celerationeffectissignificant,achievingminutes - levelfastsimulationoffloodprocessesonhundredsofmillionsof
grids.ItisexpectedtoprovideindependentandreliabletechnicalsupportforChina’sfloodforecastingandearly
warning,andprovidereferenceforparallelcomputingofotherhydrodynamicmodelssuchaslarge - scalebasin
modelsandregionalgroundwatermodels.
Keywords:partialdifferentialequations;hydrodynamicmodels;parallelcomputing;heterogeneouscomputing;
domesticprocessors;floodsimulation
(责任编辑:王 婧)
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