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#21 | |
Senior Member
Ruben Di Battista
Join Date: May 2013
Location: Paris
Posts: 137
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Quote:
![]() In addition to that if you post the code directly in your reply it stays for future reference, even if you delete the archive from Dropbox. Since I'm from the phone at the moment I would kindly ask to edit your post with these modifications so I can read them and try to see if I can help... ![]() Sent by my Honor 8 using Tapatalk |
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#22 | |
Member
Hooman
Join Date: Apr 2011
Posts: 35
Rep Power: 15 ![]() |
Quote:
U Code:
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 1 -1 0 0 0 0]; internalField uniform (-1.112096 0 0); boundaryField { inlet { type interstitialInletVelocity; inletVelocity uniform (-1.112096 0 0); alpha alpha.water; value $internalField; } outlet { type pressureInletOutletVelocity; phi phi.water; value $internalField; } top { type noSlip; } } Code:
dimensions [1 -1 -2 0 0 0 0]; internalField uniform 1e5; boundaryField { inlet { type fixedFluxPressure; value $internalField; } outlet { type prghPressure; p $internalField; value $internalField; } top { type fixedFluxPressure; value $internalField; } } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Code:
Courant Number mean: 5.34725e-08 max: 0.9516 Max Ur Courant Number = 0.625617 deltaT = 1.9149e-16 Time = 8.00643e-05 PIMPLE: iteration 1 MULES: Solving for alpha.particles MULES: Solving for alpha.particles smoothSolver: Solving for alpha.particles, Initial residual = 6.52947e-18, Final residual = 1.56184e-18, No Iterations 1 alpha.particles volume fraction = 0.0618866 Min(alpha1) = -4.53324e-36 Max(alpha1) = 0.600345 Constructing momentum equations particles min/max T 600.004 - 2.19393e+19 water min/max T 300 - 1.4779e+19 GAMG: Solving for p_rgh, Initial residual = 0.1844, Final residual = 0.0011326, No Iterations 2 GAMG: Solving for p_rgh, Initial residual = 0.00100111, Final residual = 6.8761e-06, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 6.74233e-06, Final residual = 5.48156e-08, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 5.48074e-08, Final residual = 8.52694e-09, No Iterations 2 GAMG: Solving for p_rgh, Initial residual = 8.52694e-09, Final residual = 3.51475e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 3.51475e-09, Final residual = 1.34518e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.34518e-09, Final residual = 5.5909e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 5.5909e-10, Final residual = 2.14042e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.14042e-10, Final residual = 8.94611e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 8.94611e-11, Final residual = 3.44695e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 3.44695e-11, Final residual = 1.44658e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 0.132845, Final residual = 0.000674916, No Iterations 3 GAMG: Solving for p_rgh, Initial residual = 0.000617022, Final residual = 3.97858e-06, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.78338e-06, Final residual = 3.46792e-08, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.46763e-08, Final residual = 5.48935e-09, No Iterations 2 GAMG: Solving for p_rgh, Initial residual = 5.48935e-09, Final residual = 2.10436e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.10436e-09, Final residual = 8.82825e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 8.82825e-10, Final residual = 3.38082e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 3.38082e-10, Final residual = 1.42845e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.42845e-10, Final residual = 5.4936e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 5.4936e-11, Final residual = 2.32655e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.32655e-11, Final residual = 9.07378e-12, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 0.124431, Final residual = 0.000599917, No Iterations 3 GAMG: Solving for p_rgh, Initial residual = 0.000556152, Final residual = 4.06027e-06, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.89279e-06, Final residual = 3.58228e-08, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.58196e-08, Final residual = 5.67329e-09, No Iterations 2 GAMG: Solving for p_rgh, Initial residual = 5.67328e-09, Final residual = 2.17595e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.17595e-09, Final residual = 9.11311e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 9.11311e-10, Final residual = 3.48985e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 3.48985e-10, Final residual = 1.47163e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.47163e-10, Final residual = 5.6625e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 5.6625e-11, Final residual = 2.3944e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.3944e-11, Final residual = 9.34572e-12, No Iterations 1 PIMPLE: iteration 2 MULES: Solving for alpha.particles MULES: Solving for alpha.particles smoothSolver: Solving for alpha.particles, Initial residual = 6.55151e-18, Final residual = 1.56407e-18, No Iterations 1 alpha.particles volume fraction = 0.0618866 Min(alpha1) = -4.53324e-36 Max(alpha1) = 0.600345 Constructing momentum equations particles min/max T 600.004 - 2.41872e+19 water min/max T 300 - 1.62932e+19 GAMG: Solving for p_rgh, Initial residual = 0.160617, Final residual = 0.000597597, No Iterations 3 GAMG: Solving for p_rgh, Initial residual = 0.000526756, Final residual = 2.94328e-06, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 2.81125e-06, Final residual = 2.54894e-08, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 2.54879e-08, Final residual = 9.69721e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 9.69721e-09, Final residual = 4.01961e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 4.01961e-09, Final residual = 1.53481e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.53481e-09, Final residual = 6.44996e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 6.44996e-10, Final residual = 2.46642e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.46642e-10, Final residual = 1.04385e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.04385e-10, Final residual = 4.0082e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 4.0082e-11, Final residual = 1.69983e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 0.125642, Final residual = 0.00063384, No Iterations 3 GAMG: Solving for p_rgh, Initial residual = 0.000583315, Final residual = 3.90957e-06, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.73053e-06, Final residual = 3.42426e-08, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.42398e-08, Final residual = 5.42277e-09, No Iterations 2 GAMG: Solving for p_rgh, Initial residual = 5.42277e-09, Final residual = 2.07962e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.07962e-09, Final residual = 8.71991e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 8.71991e-10, Final residual = 3.33975e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 3.33975e-10, Final residual = 1.41033e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.41033e-10, Final residual = 5.42492e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 5.42492e-11, Final residual = 2.29642e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.29642e-11, Final residual = 8.95838e-12, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 0.119471, Final residual = 0.000576083, No Iterations 3 GAMG: Solving for p_rgh, Initial residual = 0.000535629, Final residual = 3.9422e-06, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.7856e-06, Final residual = 3.48448e-08, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.48419e-08, Final residual = 5.51853e-09, No Iterations 2 GAMG: Solving for p_rgh, Initial residual = 5.51853e-09, Final residual = 2.11671e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.11671e-09, Final residual = 8.86369e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 8.86369e-10, Final residual = 3.39446e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 3.39446e-10, Final residual = 1.43116e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.43116e-10, Final residual = 5.50713e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 5.50713e-11, Final residual = 2.3285e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.3285e-11, Final residual = 9.08688e-12, No Iterations 1 PIMPLE: iteration 3 MULES: Solving for alpha.particles MULES: Solving for alpha.particles smoothSolver: Solving for alpha.particles, Initial residual = 6.46559e-18, Final residual = 1.55648e-18, No Iterations 1 alpha.particles volume fraction = 0.0618866 Min(alpha1) = -4.53324e-36 Max(alpha1) = 0.600345 Constructing momentum equations particles min/max T 600.004 - 2.76185e+19 water min/max T 300 - 1.86046e+19 GAMG: Solving for p_rgh, Initial residual = 0.146758, Final residual = 0.000597587, No Iterations 3 GAMG: Solving for p_rgh, Initial residual = 0.000532726, Final residual = 3.22656e-06, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.08401e-06, Final residual = 2.81869e-08, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 2.8185e-08, Final residual = 4.45865e-09, No Iterations 2 GAMG: Solving for p_rgh, Initial residual = 4.45865e-09, Final residual = 1.70722e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.70722e-09, Final residual = 7.1702e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 7.1702e-10, Final residual = 2.7444e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.7444e-10, Final residual = 1.16091e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.16091e-10, Final residual = 4.46259e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 4.46259e-11, Final residual = 1.89177e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.89177e-11, Final residual = 7.37524e-12, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 0.120119, Final residual = 0.000604078, No Iterations 3 GAMG: Solving for p_rgh, Initial residual = 0.00055852, Final residual = 3.85352e-06, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.68598e-06, Final residual = 3.38648e-08, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.3862e-08, Final residual = 5.36435e-09, No Iterations 2 GAMG: Solving for p_rgh, Initial residual = 5.36435e-09, Final residual = 2.05778e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.05778e-09, Final residual = 8.62458e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 8.62458e-10, Final residual = 3.30356e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 3.30356e-10, Final residual = 1.39434e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.39434e-10, Final residual = 5.36491e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 5.36491e-11, Final residual = 2.27011e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.27011e-11, Final residual = 8.859e-12, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 0.115279, Final residual = 0.000557476, No Iterations 3 GAMG: Solving for p_rgh, Initial residual = 0.000519602, Final residual = 3.86166e-06, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.713e-06, Final residual = 3.41831e-08, No Iterations 5 GAMG: Solving for p_rgh, Initial residual = 3.41803e-08, Final residual = 5.41388e-09, No Iterations 2 GAMG: Solving for p_rgh, Initial residual = 5.41388e-09, Final residual = 2.07679e-09, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.07679e-09, Final residual = 8.69468e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 8.69468e-10, Final residual = 3.33002e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 3.33002e-10, Final residual = 1.40362e-10, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1.40362e-10, Final residual = 5.40171e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 5.40171e-11, Final residual = 2.28344e-11, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.28344e-11, Final residual = 8.91275e-12, No Iterations 1 smoothSolver: Solving for Theta.particles, Initial residual = 0.354633, Final residual = 1.99366e-17, No Iterations 1 ExecutionTime = 352.74 s Code:
/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 4.1 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; location "system"; object fvSolution; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // solvers { "alpha.*" { nAlphaCorr 1; nAlphaSubCycles 2; //smoothLimiter 0.1; implicitPhasePressure yes; solver smoothSolver; smoother symGaussSeidel; tolerance 1e-9; relTol 0; minIter 1; } p_rgh { solver GAMG; smoother DIC; tolerance 1e-8; relTol 0.01; minIter 1; } p_rghFinal { $p_rgh; relTol 0; } "U.*" { solver smoothSolver; smoother symGaussSeidel; tolerance 1e-5; relTol 0; minIter 1; } "(h|e).*" { solver smoothSolver; smoother symGaussSeidel; tolerance 1e-6; relTol 0; minIter 0; maxIter 0; } "Theta.*" { solver smoothSolver; smoother symGaussSeidel; tolerance 1e-6; relTol 0; minIter 1; } "(k|epsilon).*" { solver smoothSolver; smoother symGaussSeidel; tolerance 1e-5; relTol 0; minIter 1; } } PIMPLE { nOuterCorrectors 3; nCorrectors 3; nNonOrthogonalCorrectors 10; } relaxationFactors { equations { ".*" 0.5; } } // ************************************************************************* // fvSchemes Code:
ddtSchemes { default Euler; } gradSchemes { default Gauss linear; /*div(phi,U) bounded Gauss upwind; div(phi,k) bounded Gauss upwind; div(phi,epsilon) bounded Gauss upwind; div((nuEff*dev2(T(grad(U))))) Gauss linear;*/ } divSchemes { default none; "div\(phi,alpha.*\)" Gauss vanLeer; "div\(phir,alpha.*\)" Gauss vanLeer; "div\(alphaRhoPhi.*,U.*\)" Gauss limitedLinearV 1; "div\(phi.*,U.*\)" Gauss limitedLinearV 1; "div\(alphaRhoPhi.*,(h|e).*\)" Gauss limitedLinear 1; "div\(alphaRhoPhi.*,K.*\)" Gauss limitedLinear 1; "div\(alphaPhi.*,p\)" Gauss limitedLinear 1; div(alphaRhoPhi.particles,Theta.particles) Gauss limitedLinear 1; "div\(alphaRhoPhi.*,(k|epsilon).*\)" Gauss limitedLinear 1; /*"div\(alphaRhoPhi.*,U.*\)" bounded Gauss upwind; "div\(phi.*,U.*\)" bounded Gauss upwind; "div\(alphaRhoPhi.*,(h|e).*\)" bounded Gauss upwind; "div\(alphaRhoPhi.*,K.*\)" bounded Gauss upwind; "div\(alphaPhi.*,p\)" bounded Gauss upwind; div(alphaRhoPhi.particles,Theta.particles) bounded Gauss upwind; "div\(alphaRhoPhi.*,(k|epsilon).*\)" bounded Gauss upwind;*/ div((((alpha.water*thermo:rho.water)*nuEff.water)*dev2(T(grad(U.water))))) Gauss linear; div((((thermo:rho.particles*nut.particles)*dev2(T(grad(U.particles))))+(((thermo:rho.particles*lambda.particles)*div(phi.particles))*I))) Gauss linear; } laplacianSchemes { default Gauss linear uncorrected; bounded Gauss linear uncorrected; /*default Gauss linear limited 0.5; bounded Gauss linear limited 0.5;*/ } interpolationSchemes { default linear; } snGradSchemes { default uncorrected; bounded uncorrected; } // ************************************************************************* // Code:
Checking geometry... Overall domain bounding box (-0.05560247 -0.05558248 0.0003519632) (0.09964492 0.05564084 0.2476475) Mesh has 3 geometric (non-empty/wedge) directions (1 1 1) Mesh has 3 solution (non-empty) directions (1 1 1) Boundary openness (5.655138e-15 -5.589869e-15 2.068406e-15) OK. Max cell openness = 3.333135e-16 OK. Max aspect ratio = 12.30445 OK. Minimum face area = 4.666168e-08. Maximum face area = 2.189186e-06. Face area magnitudes OK. Min volume = 4.40432e-11. Max volume = 1.523349e-09. Total volume = 0.002161009. Cell volumes OK. Mesh non-orthogonality Max: 64.98925 average: 2.613793 Non-orthogonality check OK. Face pyramids OK. Max skewness = 1.380155 OK. Coupled point location match (average 0) OK. Mesh OK. End |
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#23 | |
Member
Hooman
Join Date: Apr 2011
Posts: 35
Rep Power: 15 ![]() |
Quote:
phase properties Code:
type heatAndMomentumTransferTwoPhaseSystem; phases (particles water); particles { type purePhaseModel; diameterModel constant; constantCoeffs { d 3.72e-6; } alphaMax 0.62; residualAlpha 1e-6; } water { type purePhaseModel; diameterModel constant; constantCoeffs { d 1; } residualAlpha 0; } blending { default { type none; continuousPhase water; } } surfaceTension ( (water and particles) { type constant; sigma 0; } ); aspectRatio ( ); drag ( (particles in water) { type GidaspowErgunWenYu; residualRe 1e-3; swarmCorrection { type none; } } ); virtualMass ( ); heatTransfer ( (particles in water) { type RanzMarshall; residualAlpha 1e-4; } ); lift ( ); wallLubrication ( ); turbulentDispersion ( ); // Minimum allowable pressure pMin 10000; Code:
dimensions [0 0 0 0 0 0 0]; internalField uniform 0; boundaryField { inlet { type zeroGradient; } outlet { type zeroGradient; } top { type zeroGradient; } } |
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#24 | |
Senior Member
Ruben Di Battista
Join Date: May 2013
Location: Paris
Posts: 137
Rep Power: 13 ![]() |
Quote:
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#25 | |
Member
Hooman
Join Date: Apr 2011
Posts: 35
Rep Power: 15 ![]() |
Quote:
![]() I have tried everything... Low courant number ... Low relaxation factor... Upwind methods ... confusing ? PS: The reason I switched to reactingTwoPhaseEulerFoam was its more stability based on some comments in the forum. Last edited by hooman.4028; July 12, 2017 at 18:11. |
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#26 |
New Member
Umer
Join Date: Aug 2016
Posts: 29
Rep Power: 10 ![]() |
Hi All,
I want your help in adding capillary pressure in the twoPhaseEulerFoam solver that I have modified for porous media (darcy source). May be if you can give some good suggestion. Few things I want to check about this solver: 1: if I look into the solver (multiphase>twoPhaseEulerFoam) > PEqn.H : I can see its solving the pressure separately (each Phase) then its taking average of both pressures. am i correct? 2: If its solving two pressures in each domain if i want to add capillary pressure for porous media that would be addition of Pc in one equation only like Pc=Pa-Pb and Pa=Pb+Pc where Pc=Pdx(Saturation function model) then where should I add Pc in PEqn.H? Can you please give me some suggestion on it? Regards, Umer |
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#27 | |
Senior Member
Ruben Di Battista
Join Date: May 2013
Location: Paris
Posts: 137
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Quote:
![]() Moreover, I'm not very familiar with capillarity so, on the base of the informations you given, I do not feel I could really be of help. I'm sorry... For the specific problem, moreover, I suggest you to open a new thread. This thread is for discussing how to suppress the energy equation! |
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#28 | |
New Member
Umer
Join Date: Aug 2016
Posts: 29
Rep Power: 10 ![]() |
Quote:
Thanks for your quick and nice reply. As i am not expert in CFD but just looking for few modifications in this solver. I will open new thread for capillarity as suggested but can you tell me how difficult is to add a new equation for mass transfer in it. M=KA(Cs-Ca). I am looking for gas dissolution rate of gas in water. Regards, Umer |
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#29 | |
Senior Member
Ruben Di Battista
Join Date: May 2013
Location: Paris
Posts: 137
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Quote:
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#30 |
New Member
Join Date: Apr 2018
Posts: 2
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Hi everyone,
I changed the geometry fo my simulation to a cilinder with 20 circles as the inlet using SALOME. I had the following error while running my simulation: --> FOAM FATAL ERROR: Negative initial temperature T0: -484.949 Does someone know how can I solve it? |
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#31 | |
Member
Join Date: Apr 2016
Posts: 30
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Quote:
Just a couple of follow up questions. So I am trying to simulate two phase flow with one phase dispersed in another. However, fluids are incompressible and I don't want to solve the energy equation. If you suppress the energy equation the way you did it, does it become an incompressible flow solver. Your help in this matter is greatly appreciated. Thanks and Regards, |
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#32 | |
Senior Member
Ruben Di Battista
Join Date: May 2013
Location: Paris
Posts: 137
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Quote:
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#33 | |
Member
Join Date: Apr 2016
Posts: 30
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Quote:
Hope I was clear in my question. Also I just want to simulate two phase imcompressible flow without heat transfer. I am just interested in transport. |
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#34 | |
Senior Member
Ruben Di Battista
Join Date: May 2013
Location: Paris
Posts: 137
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Quote:
You could maybe tryout reactingTwoPhaseEulerFoam with an Isothermal phase model... |
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