简介:Anumericalanalysisofnon-Newtonianfluidflowinnon-planararterywithbifurcationwasperformedbyusingafiniteelementmethodtosolvethethree-dimensionalNavier-Stokesequationscoupledwiththenon-Newtonianconstitutivemodels,includingCarreau,CrossandBinghammodels.Theobjectiveofthisstudyistoinvestigatetheeffectsofthenon-Newtonianpropertiesofbloodaswellascurvatureandout-of-planegeometryinthenon-planardaughtervesselsonthevelocitydistributionandwallshearstress.Theresultsofthisstudysupporttheviewthatthenon-planarityofbloodvesselsandthenon-Newtonianpropertiesofbloodareofimportantinhemodynamicsandplayasignificantroleinvascularbiologyandpathophysiology.
简介:Athree-dimensionalmathematicalmodelforcalculatingthesteadyflowofcircularnon-buoyantturbulentsurfaceinacoflowingchannelispresentedinthispaper.Forclosingthecontrolequations,theκ-εturbulencemodelisusedinthemathematicalmodel.Thewall-functionmethodisemployedtotreatthewallboundaryconditionatthebottomplane.TheclosedcontrolequationsarediscretizedbyusingHybridFiniteAnalyticMethod(HFAM)onanon-uniformstaggeredgridsystem.Thenumericalresultsareobtainedfordifferentratioofthejetvelocitytothecoflowingvelocity.Thecomparisonwithexperimentaldatashowsgoodagreement.