Remark: The governing equation of energy solved by Fluent isas follows:a(pE)+V.(V(pE+p))=V.kefVT-ZhjJj+(Tef-+SkatE=h-P,2Enthalpyp28.1FormatImprovementofGeneralGoverningEguationaaa(pc,T)a(ocnuT)a(Oc,TaTaT+STayaxataxayaxdaaSTAOa(puT)a(pvT)aa(pT)axataxayaxdyayCpCPacpaTdcOCpOT1ataxax116/58
Remark: The governing equation of energy solved by Fluent is as follows： 8.1 Format Improvement of General Governing Equation Enthalpy 16/58
Improvedformatofthegeneral G.E.The frame work of the previous G.E. is retained（保留），butthediffusioncoefficientisresumedto（恢复到）its originalvalue by introducing a nominaldensity as follows:a(pd)+ div(p*pU) = div(Tgradp) + SatThe new form of G.E. are:So*p*TedEquation010Continuity equationpappfx-Momentumeqn.(xdirection)uup业Momentum eqn. (y direction)upfypayT入STEnergyequationpcp17/58
Improved format of the general G.E. The frame work of the previous G.E. is retained (保留), but the diffusion coefficient is resumed to（恢 复到） its original value by introducing a nominal density as follows: * * * ( ) div U div grad S ( ) ( ) t + = + The new form of G.E. are: 17/58
Fluent for solid phase:Vis rotational or translational motion of solidsO(ph)+V.(Xoh)=V.(kVT)+Shh:enthalpyaOur general Code:a(pcpT)dC+STdtdxnSuch a treatment is much better than taking I / c,as a nominal diffusion coefficient and Sr / Cp as anominal sourceterm18/58
Fluent for solid phase: Our general Code: Such a treatment is much better than taking as a nominal diffusion coefficient and as a nominal source term. / p c / T p S c V is rotational or translational motion of solids h: enthalpy 18/58
To select the model, the command is as follows:SolutionSetupModel@Modelswiuiuphase(OnXEnergyEnergy(On)k-omega)EpergyRadiation (Ofl)HeatExchanger (Off)Energy EquationSpecies(Off)DiscretePhase(Off)Solidification&Melting (Off)Acoustics (Off)4Structure(Off)EulerianWallFilm(Off)OKCancelHelpPotential/L-ion Battery (Off)BatteryModel (Off)Remark: It is interesting to note that no matter what kindof problems you will solve, the model "Viscous-Laminar"is always activated.19/58
To select the model, the command is as follows: Remark: It is interesting to note that no matter what kind of problems you will solve, the model “Viscous-Laminar” is always activated. Solution Setup→Model 19/58