2010-05-12 13:27:55 +00:00
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fvVectorMatrix UaEqn(Ua, Ua.dimensions()*dimVol/dimTime);
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fvVectorMatrix UbEqn(Ub, Ub.dimensions()*dimVol/dimTime);
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{
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{
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volTensorField gradUaT = fvc::grad(Ua)().T();
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volTensorField Rca
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(
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"Rca",
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((2.0/3.0)*I)*(sqr(Ct)*k + nuEffa*tr(gradUaT)) - nuEffa*gradUaT
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);
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if (kineticTheory.on())
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{
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Rca -= ((kineticTheory.lambda()/rhoa)*tr(gradUaT))*tensor(I);
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}
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surfaceScalarField phiRa =
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-fvc::interpolate(nuEffa)*mesh.magSf()*fvc::snGrad(alpha)
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/fvc::interpolate(alpha + scalar(0.001));
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UaEqn =
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(
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(scalar(1) + Cvm*rhob*beta/rhoa)*
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(
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fvm::ddt(Ua)
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+ fvm::div(phia, Ua, "div(phia,Ua)")
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- fvm::Sp(fvc::div(phia), Ua)
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)
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- fvm::laplacian(nuEffa, Ua)
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+ fvc::div(Rca)
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+ fvm::div(phiRa, Ua, "div(phia,Ua)")
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- fvm::Sp(fvc::div(phiRa), Ua)
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+ (fvc::grad(alpha)/(fvc::average(alpha) + scalar(0.001)) & Rca)
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==
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// g // Buoyancy term transfered to p-equation
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- fvm::Sp(beta/rhoa*K, Ua)
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//+ beta/rhoa*K*Ub // Explicit drag transfered to p-equation
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- beta/rhoa*(liftCoeff - Cvm*rhob*DDtUb)
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);
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UaEqn.relax();
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}
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{
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volTensorField gradUbT = fvc::grad(Ub)().T();
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volTensorField Rcb
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(
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"Rcb",
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((2.0/3.0)*I)*(k + nuEffb*tr(gradUbT)) - nuEffb*gradUbT
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);
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surfaceScalarField phiRb =
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-fvc::interpolate(nuEffb)*mesh.magSf()*fvc::snGrad(beta)
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/fvc::interpolate(beta + scalar(0.001));
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2013-07-18 01:02:34 +00:00
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UbEqn =
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2010-05-12 13:27:55 +00:00
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(
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(scalar(1) + Cvm*rhob*alpha/rhob)*
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(
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fvm::ddt(Ub)
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+ fvm::div(phib, Ub, "div(phib,Ub)")
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- fvm::Sp(fvc::div(phib), Ub)
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)
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- fvm::laplacian(nuEffb, Ub)
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+ fvc::div(Rcb)
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+ fvm::div(phiRb, Ub, "div(phib,Ub)")
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- fvm::Sp(fvc::div(phiRb), Ub)
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+ (fvc::grad(beta)/(fvc::average(beta) + scalar(0.001)) & Rcb)
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==
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// g // Buoyancy term transfered to p-equation
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- fvm::Sp(alpha/rhob*K, Ub)
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//+ alpha/rhob*K*Ua // Explicit drag transfered to p-equation
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+ alpha/rhob*(liftCoeff + Cvm*rhob*DDtUa)
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);
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UbEqn.relax();
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}
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}
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