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73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
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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volTensorField Rca(-nuEffa*(T(fvc::grad(Ua))));
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Rca = Rca + (2.0/3.0)*sqr(Ct)*I*k - (2.0/3.0)*I*tr(Rca);
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surfaceScalarField phiRa
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(
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- fvc::interpolate(nuEffa)
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*mesh.magSf()*fvc::snGrad(alpha)/fvc::interpolate(alpha + scalar(0.001))
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);
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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*dragCoef, Ua)
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//+ beta/rhoa*dragCoef*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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volTensorField Rcb(-nuEffb*T(fvc::grad(Ub)));
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Rcb = Rcb + (2.0/3.0)*I*k - (2.0/3.0)*I*tr(Rcb);
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surfaceScalarField phiRb
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(
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- fvc::interpolate(nuEffb)
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*mesh.magSf()*fvc::snGrad(beta)/fvc::interpolate(beta + scalar(0.001))
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);
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UbEqn =
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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*dragCoef, Ub)
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//+ alpha/rhob*dragCoef*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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