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Showing results 1 to 17 of 17 Search took 0.00 seconds. Search: Posts Made By: qi.yang@polimi.it

Forum: OpenFOAM Programming & Development February 10, 2020, 03:37

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it Thanks a lot Dongyue. The equations that I wrote... Thanks a lot Dongyue. The equations that I wrote here are not accurate and you are right. We will not use the dispersion force defined in the openfoam because our group provided a new two fluid...

Forum: OpenFOAM Programming & Development February 7, 2020, 04:23

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it My obejective is to add the phase dispersion term... My obejective is to add the phase dispersion term in both U and p equations Please help me to verify the codes I wrote are right or not? In Uequation I wrote like this: U1Eqn = ( ...

Forum: OpenFOAM Programming & Development February 7, 2020, 03:59

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it -fvm::div(fvc::snGrad(alpha1)*mesh.magSf()*fvc::in... -fvm::div(fvc::snGrad(alpha1)*mesh.magSf()*fvc::interpolate(rho1*phase2.turbulence().nut())/sigma, U1) I changed it to be like this, it compiled. But the simulation is also crashed for the fine...

Forum: OpenFOAM Programming & Development February 7, 2020, 03:40

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it Thanks. In your opinion, -... Thanks. In your opinion, - fvc::div(fvc::grad(alpha1)*rho1*phase2.turbulence( ).nut()/sigma*U1) this code is reasonable or not? After I added this code in the equation, it can be compiled and run...

Forum: OpenFOAM Programming & Development February 6, 2020, 10:33

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it It is so weird. When I used the mesh with larger... It is so weird. When I used the mesh with larger boundary layer thickness, the result is reasonable and accurate. After I decreased the boundary layer thickness, it was crashed cause the bounding k...

Forum: OpenFOAM Programming & Development February 5, 2020, 12:23

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it I think I solved the problem with the following... I think I solved the problem with the following code: - fvc::div(fvc::grad(alpha1)*rho1*phase2.turbulence().nut()/sigma*U1) it was compiled successfully and I ran the test case. The results seem...

Forum: OpenFOAM Programming & Development February 5, 2020, 11:59

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it sigma I defined like the following in... sigma I defined like the following in createfields: dimensionedScalar sigma("sigma", dimViscosity/dimViscosity, mytransportProperties); In fact, it is dimensionless.

Forum: OpenFOAM Programming & Development February 5, 2020, 08:43

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it Sorry, I am not so familiar with numerical... Sorry, I am not so familiar with numerical scheme. I found one equation described here. When we should regard one term as a source term rather than add it directly in the equation? solve(...

Forum: OpenFOAM Programming & Development February 5, 2020, 08:36

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it rho1 is the density of phase1 (dimensioned volume... rho1 is the density of phase1 (dimensioned volume scalar) sigma is defined by me, which is a dimensonless constant.

Forum: OpenFOAM Programming & Development February 5, 2020, 08:12

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it Sorry. I mean "failed" In file included from... Sorry. I mean "failed" In file included from mytwoPhaseEulerFoam1.C:96:0: pUf/UEqns.H: In function 'int main(int, char**)': pUf/UEqns.H:18:5: error: no matching function for call to...

Forum: OpenFOAM Programming & Development February 5, 2020, 08:03

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it I tried this but it faild again. I tried this but it faild again.

Forum: OpenFOAM Programming & Development February 5, 2020, 07:52

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it The following is the original code for UEquation,... The following is the original code for UEquation, but divDevRhoReff(U2) is not the surface field? U2Eqn = ( fvm::ddt(alpha2, rho2, U2) + fvm::div(alphaRhoPhi2, U2) ...

Forum: OpenFOAM Programming & Development February 5, 2020, 06:10

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it I am confused that both U equation and P equation... I am confused that both U equation and P equation are based on the surface field? pEqnComp1 = ( contErr1 - fvc::Sp(fvc::ddt(alpha1) + fvc::div(alphaPhi1), rho1) )/rho1 +...

Forum: OpenFOAM Programming & Development February 5, 2020, 05:44

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it After I changed the code like this, the error... After I changed the code like this, the error occurs: - fvm::div(rho1*phase2.turbulence().nut()/sigma*fvc::snGrad(alpha1), U1) In file included from mytwoPhaseEulerFoam1.C:96:0: pUf/UEqns.H:...

Forum: OpenFOAM Programming & Development February 5, 2020, 05:39

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it Really thanks. In terms of the pressure... Really thanks. In terms of the pressure equations, there are some parts to be changed?

Forum: OpenFOAM Programming & Development February 5, 2020, 05:20

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it Thanks a lot, Cyprien.. I also changed the mass... Thanks a lot, Cyprien.. I also changed the mass conservation equation as shown following. But in my momentum equation, there is no phi existing. Could you please help me to see that pic I attached. ...

Forum: OpenFOAM Programming & Development February 4, 2020, 13:08

Replies: 26 add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Views: 1,655 Posted By qi.yang@polimi.it add a phase diffusion term in both continuity and monmentum equations for twoPhEuler Hi everone, Please help me to verify the code I wrote is reasonable or not, Thanks a lot. I need to add a diffusion term (which is shown in the attached figure) in both Uequation and pequation for...

Showing results 1 to 17 of 17

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