Title of article :
Numericalsimulationofhyperbolictwo-phaseflowmodelsusingaRoe-typesolverOriginalResearchArticle
Author/Authors :
MichaëlNdjinga، نويسنده , , AnelaKumbaro، نويسنده , , FlorianDeVuyst، نويسنده , , PascalLaurent-Gengoux، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
TheapplicationofthegeneralizedRoeschemetothenumericalsimulationoftwo-phaseflowmodelsrequiresafastandrobustcomputationoftheabsolutevalueofthesystemmatrix.Inseveralmodelssuchasthetwo-fluidmodelorageneralmultifieldmodel,thismatrixhasanon-trivialeigenstructureandtheeigendecompositionisoftenillconditioned.Wegiveageneralalgorithmavoidingthediagonalizationprocess.Itisbasedonaniterativeapproach,butturnsouttobeanexactcomputationwhentheeigenvaluesarereal.Theknowledgeofthecharacteristicpolynomialgivesusaneasyaccesstotheeigenvaluesbuthowever,theiterativeschemecanbeusedwithonlyestimatesoftheeigenvalues,usingforexampleGershgorin’sdisklocalization.Wefinallyshowsomenumericalresultsoftwo-fluidmodelsimulationsinvolvinginterfacialpressureandavirtualmassforcemodel.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
