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
Pages
9
From page
2075
To page
2083
Abstract
TheapplicationofthegeneralizedRoeschemetothenumericalsimulationoftwo-phaseflowmodelsrequiresafastandrobustcomputationoftheabsolutevalueofthesystemmatrix.Inseveralmodelssuchasthetwo-fluidmodelorageneralmultifieldmodel,thismatrixhasanon-trivialeigenstructureandtheeigendecompositionisoftenillconditioned.Wegiveageneralalgorithmavoidingthediagonalizationprocess.Itisbasedonaniterativeapproach,butturnsouttobeanexactcomputationwhentheeigenvaluesarereal.Theknowledgeofthecharacteristicpolynomialgivesusaneasyaccesstotheeigenvaluesbuthowever,theiterativeschemecanbeusedwithonlyestimatesoftheeigenvalues,usingforexampleGershgorin’sdisklocalization.Wefinallyshowsomenumericalresultsoftwo-fluidmodelsimulationsinvolvinginterfacialpressureandavirtualmassforcemodel.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895162
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