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TwoPhaseEulerFoam: trying to understand the terms in UEqns.H |
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#1 |
New Member
ARUN
Join Date: Jan 2015
Location: Kerala
Posts: 18
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Hi All,
I would like to know some insight abt this equation referred in "UEqns.H" in twoPhaseEulerFoam solver used for solving multiphase problems. If someone can help me in understanding what each term here does in this equation will be helpful. I have some idea regarding these bt to crosscheck it, i need you help. I have listed the UEqn1 for convenience here: U1Eqn = ( (scalar(1) + Cvm*rho2*alpha2/rho1)* ( fvm::ddt(U1) + fvm::div(phi1, U1, "div(phi1,U1)") - fvm::Sp(fvc::div(phi1), U1) ) - fvm::laplacian(nuEff1, U1) + fvc::div(Rc1) + fvm::div(phiR1, U1, "div(phi1,U1)") - fvm::Sp(fvc::div(phiR1), U1) + (fvc::grad(alpha1)/(fvc::average(alpha1) + scalar(0.001)) & Rc1) == // g // Buoyancy term transfered to p-equation - fvm::Sp(alpha2/rho1*K, U1) //+ alpha2/rho1*K*U2 // Explicit drag transfered to p-equation - alpha2/rho1*(liftCoeff - Cvm*rho2*DDtU2) ); mrfZones.addCoriolis(scalar(1) + Cvm*rho2*alpha2/rho1, U1Eqn); U1Eqn.relax(); } and also what does surfaceScalarField phiR1 ( -fvc::interpolate(nuEff1)*mesh.magSf()*fvc::snGrad( alpha1) /fvc::interpolate(alpha1 + scalar(0.001)) ); refer to in "UEqn.H" I am using OF2.2.2 version. Thank you! |
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#2 |
New Member
Andrew Smith
Join Date: Jan 2015
Location: North Dakota
Posts: 24
Rep Power: 11 ![]() |
For theory refer H Jasak thesis
Rest detailed information on OpenFOAM comes under NDA (https://en.wikipedia.org/wiki/Non-disclosure_agreement) Also check this http://www.cfd-online.com/Forums/ope...-velocity.html All I can say.. unlike commercial cfd softwares OpenFOAM is much complex. Wish you Good Luck man ![]() |
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