多孔介質(zhì)設(shè)置及建模實(shí)例

我做的多孔介質(zhì)的簡(jiǎn)單例子（均為k-eRNG所做）模型仿真結(jié)果I247A+01?3-a*+0iH222e*012.tD?+OIV1Q7i+01135?rOt173e+011如Ml1皿*013B*+O1I123?*011-11letOIOS7A+OD8g心740H+00[B+7^+00i40da*0DI37Da*OD47*+Q0123e*0Q'OJ04qMValticityV?etof￡Caior^dBjfValoellyM?gni1ud(rCmAi)Ngm2COBFLUENT33(34pbw.mg247s-*&134e*Qi222EM2.10fr*01107*+011簡(jiǎn)EM173e*O1f48e*0138瑚11.23e*O1i9,87EX)8B44i-?CO7生EX)617100706-0047e-tOO1.25e*0C*3多孔介質(zhì)定義的方法不知道怎的，這些日子都跟多孔介質(zhì)干上了Definetheporouszone.Definetheporousvelocityformulation.(optional)Identifythefluidmaterialflowingthroughtheporousmedium.Enablereactionsfortheporouszone,ifappropriate,andselectthereactionmechanism.Settheviscousresistancecoefficientsandtheinertialresistancecoefficients,anddefinethedirectionvectorsforwhichtheyapply.Alternatively,specifythecoefficientsforthepower-lawmodel.Specifytheporosityoftheporousmedium.Selectthematerialcontainedintheporousmedium(requiredonlyformodelsthatincludeheattransfer).Notethatthespecificheatcapacity,,fortheselectedmaterialintheporouszonecanonlybeenteredasaconstantvalue.Setthevolumetricheatgenerationrateinthesolidportionoftheporousmedium(oranyothersources,suchasmassormomentum).(optional)Setanyfixedvaluesforsolutionvariablesinthefluidregion(optional).10.Suppresstheturbulentviscosityintheporousregion,ifappropriate.11.Specifytherotationaxisand/orzonemotion,ifrelevant.fluent中多孔介質(zhì)porousmedia設(shè)置問(wèn)題(2oo8-i2-i320-08-07)Q標(biāo)簽：雜談分類：CFD計(jì)算流體力學(xué)經(jīng)過(guò)痛苦的一段經(jīng)歷，終于將局部問(wèn)題真相大白，為了使保位同仁不再經(jīng)過(guò)我之痛苦，現(xiàn)在將本人多孔介質(zhì)經(jīng)驗(yàn)公布如下，希望各位能加精：1。Gambit中劃分網(wǎng)格之后，定義需要做為多孔介質(zhì)的區(qū)域?yàn)閒luid，與缺省的fluid分別開(kāi)來(lái)，再定義其名稱，我習(xí)慣將名稱定義為porous;

2。在fluent中定義邊界條件define-boundarycondition-porous（剛定義的名稱），將其設(shè)置邊界條件為fluid,點(diǎn)擊set按鈕即彈出與fluid邊界條件一樣的對(duì)話框，選中porouszone與laminar復(fù)選框，再點(diǎn)擊porouszone標(biāo)簽即出現(xiàn)一個(gè)帶有滾動(dòng)條的界面；

3。porouszone設(shè)置方法:1）定義矢量：二維定義一個(gè)矢量，第二個(gè)矢量方向不用定義，是與第一個(gè)矢量方向正交的;

三維定義二個(gè)矢量，第三個(gè)矢量方向不用定義，是與第一、二個(gè)矢量方向正交的;（如何知道矢量的方向：打開(kāi)grid圖，看看X,Y,Z的方向，如果是X向，矢量為1,0,0，同理Y向?yàn)?,1,0，Z向?yàn)?,0,1,如果所需要的方向與坐標(biāo)軸正向相反，則定義矢量為負(fù)）圓錐坐標(biāo)與球坐標(biāo)請(qǐng)參考fluent幫助。2）定義粘性阻力1/a與內(nèi)部阻力C2：請(qǐng)參看本人上一篇博文“終于搞清fluent中多孔粘性阻力與內(nèi)部阻力的計(jì)算方法”，此處不贅述；《RelativeVelocityResistanceFurmulatmnVtscousResistanceDirection-12.2527e+39constant，Direction-2(1/m2]2.2527e+87constant，Direction-3(l/m2]2.2527e+97constant，3）如果了定義粘性阻力1/a與內(nèi)部阻力C2,就不用定義C1與C0，因?yàn)檫@是兩種不同的定義方法，C1與C0只在幕率模型中出現(xiàn)，該處保持默認(rèn)就行了；PowerLawModel"理C1f4）定義孔隙率porousity，默認(rèn)值1表示全開(kāi)放，此值按實(shí)驗(yàn)測(cè)值填寫即可。完了，其他設(shè)置與普通k-e或RSM相同?？偨Y(jié)一下，與君共享！終于搞清fluent中多孔粘性阻力與內(nèi)部阻力的計(jì)算方法Experimentaldatathatisavailableintheformofpressuredropagainstvelocitythroughtheporouscomponent,canbeextrapolatedtodeterminethecoecientsfortheporousmedia.Toeectapressuredropacrossaporousmediumofthickness,n,thecoecientsoftheporousmediaaredeterminedinthemannerdescribedbelow.Iftheexperimentaldatais:VelocityPressureDrop(m/s)(Pa)20.078.050.0487.080.01432.0110.02964.0I!henuij-“rVvl\ijlbutvs.rejdi?athindhiLi1Lbruu胃hLh〔*?puihLsyiek]iijgthe利卯而虺wjnarii-isiM=D.納綁-4.33^'(7.19-22)wltor*1AjjislIn|iK^siLnrdropnibdcl&Ihevidu*：i.tv.Notothat&istiuplibcdVorsiotDafthdluuirueiktumeQuatum,telBtiugtheprestut^droptoriiewmriprfnn.「；=inhpi?xpr已心叫m孫=.&(7.19-23JOFAp=-$4h(7.19-24)HenrR,?rnpnring阮uMkm7.15^22toBquatinn7.1^2,yinldRthf?fbllowiri^ciitvp<?rtfici^nU：■湖2師=CM%郭)￡■withp—1225kgma."ndapcnnieniediBthi