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Adding source term with fvOptions to ke model 

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May 21, 2020, 17:34 
Adding source term with fvOptions to ke model

#1 
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René Thibault
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Hi everyone!
I got some issue to implement a source term via fvOptions to the ke model. The source term is apply on epsilon(only) to the ke turbulence model for 1D (x=1mm, y=150mm, z=1mm) ABL simulation in order to simplify the simulation. Y+ is around 50. The y component I used in the formula is the center of the cells so, ycoordinate of internal cells (distance from the wall to the center of each cells,see text file, 3rd column). From the results, the calculation by the equation "epsilonSource[i]" are good since I printed out the results in a text file and verified the validity but the source term doesn't seems to be applied correctly to the domain(see picture). The boundary wall seems to work (in the epsilon patch I choose the BC "epsilonWallFunction"). The simulation stop after 11 step of iteration... If someone has a clue, an idea what could be the issue, it would be appreciated. Do you guys think the source term is applied automatically in the epsilonBC as well? If don't, should I? Best Regards, Paper where I found the term source: https://www.sciencedirect.com/scienc...6761051100002X https://www.researchgate.net/publica...n_of_ABL_flows fvOptions file: Code:
/** C++ **\  =========    \\ / F ield  OpenFOAM: The Open Source CFD Toolbox   \\ / O peration  Version: v1906   \\ / A nd  Web: www.OpenFOAM.com   \\/ M anipulation   \**/ FoamFile { version 2.0; format ascii; class dictionary; location "system"; object fvOptions; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // epsilonSource { type scalarCodedSource; selectionMode all; active true; fields (epsilon); name epsilonSource; codeInclude #{ #include "OFstream.H" #}; codeAddSup #{ const Time& time = mesh_.time(); const scalar us_ = 0.76; const scalar D1k_ = 1.44; const scalar D2k_ = 1.92; const scalar kappa_ = 0.41; const scalar sigmaEps_ = 1.3; const scalar Cmu_ = 0.09; const scalar z0_ = 3.3474e05; const vectorField& CellC = mesh_.C(); scalarField& epsilonSource = eqn.source(); // Apply the source forAll(CellC, i) { epsilonSource[i] += (pow(us_,4)/(pow((CellC[i].y()+z0_),2))) *(((D2k_D1k_)*sqrt(Cmu_)/pow(kappa_,2))(1/sigmaEps_)); std::ofstream file; file.open ("Epsilonterm.txt", std::ofstream::out  std::ofstream::app); file << time.value() << " " << epsilonSource[i] << " " << CellC[i].y() << std::endl << "\n"; file.close(); }; #}; codeCorrect #{ #}; codeConstrain #{ #}; } // ************************************************************************* // Code:
/**\  =========    \\ / F ield  OpenFOAM: The Open Source CFD Toolbox   \\ / O peration  Version: v1906   \\ / A nd  Web: www.OpenFOAM.com   \\/ M anipulation   \**/ Build : v1906 OPENFOAM=1906 Arch : "LSB;label=32;scalar=64" Exec : simpleFoam Date : May 21 2020 Time : 17:23:59 Host : reneOptiPlex790 PID : 16903 I/O : uncollated Case : /home/rene/OpenFOAM/renev1906/run/1D_E1 nProcs : 1 trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE). fileModificationChecking : Monitoring runtime modified files using timeStampMaster (fileModificationSkew 10) allowSystemOperations : Allowing usersupplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create mesh for time = 0 SIMPLE: convergence criteria field U tolerance 1e06 field k tolerance 1e06 field epsilon tolerance 1e06 field omega tolerance 1e06 field nuTilda tolerance 1e06 field T tolerance 1e06 field p_rgh tolerance 1e06 field p tolerance 1e06 Reading field p Reading field U Reading/calculating face flux field phi Selecting incompressible transport model Newtonian Selecting turbulence model type RAS Selecting RAS turbulence model kEpsilon kEpsilonCoeffs { label "Standard highRe k\u03B5"; fieldMaps { k k; epsilon epsilon; nut nut; } Cmu 0.09; C1 1.44; C2 1.92; E 9.8; sigmak 1; sigmaEps 1.3; C3 0; } No MRF models present Creating finite volume options from "system/fvOptions" Selecting finite volume options type scalarCodedSource Source: epsilonSource  selecting all cells  selected 150 cell(s) with volume 1.5e07 Starting time loop turbulenceFields turbulenceFields1: storing fields: turbulenceProperties:R turbulenceProperties:I turbulenceProperties:L Time = 1 smoothSolver: Solving for Ux, Initial residual = 5.781665123e06, Final residual = 2.320453622e10, No Iterations 8 smoothSolver: Solving for Uy, Initial residual = 0.9089618075, Final residual = 5.582492529e05, No Iterations 7 smoothSolver: Solving for Uz, Initial residual = 1.786751413e15, Final residual = 4.823728453e16, No Iterations 1 GAMG: Solving for p, Initial residual = 0.7530448709, Final residual = 5.369605972e05, No Iterations 21 time step continuity errors : sum local = 3.673528501e19, global = 3.673528501e19, cumulative = 3.673528501e19 Using dynamicCode for fvOption::epsilonSource at line 1 in "/home/rene/OpenFOAM/renev1906/run/1D_E1/system/fvOptions.epsilonSource" Creating new library in "dynamicCode/epsilonSource/platforms/linux64GccDPInt32Opt/lib/libepsilonSource_273d0b6b78f639d7c93a407718428cb1cf5e4e35.so" Invoking wmake libso /home/rene/OpenFOAM/renev1906/run/1D_E1/dynamicCode/epsilonSource wmake libso /home/rene/OpenFOAM/renev1906/run/1D_E1/dynamicCode/epsilonSource dep: codedFvOptionTemplate.C Ctoo: codedFvOptionTemplate.C ld: /home/rene/OpenFOAM/renev1906/run/1D_E1/dynamicCode/epsilonSource/../platforms/linux64GccDPInt32Opt/lib/libepsilonSource_273d0b6b78f639d7c93a407718428cb1cf5e4e35.so Selecting finite volume options type epsilonSource Source: epsilonSource  selecting all cells  selected 150 cell(s) with volume 1.5e07 smoothSolver: Solving for epsilon, Initial residual = 0.9998814658, Final residual = 2.827019512e05, No Iterations 8 bounding epsilon, min: 506399185.4 max: 2140.790268 average: 5800585.107 smoothSolver: Solving for k, Initial residual = 1, Final residual = 9.257761502e05, No Iterations 7 ExecutionTime = 0.06 s ClockTime = 3 s Time = 2 smoothSolver: Solving for Ux, Initial residual = 0.0002397693829, Final residual = 8.113253956e09, No Iterations 7 smoothSolver: Solving for Uy, Initial residual = 0.01029908582, Final residual = 4.358351871e07, No Iterations 7 smoothSolver: Solving for Uz, Initial residual = 0.0629515603, Final residual = 2.569515862e06, No Iterations 6 GAMG: Solving for p, Initial residual = 0.7143023531, Final residual = 104040663.2, No Iterations 1000 time step continuity errors : sum local = 1.213998486e05, global = 1.400000834e09, cumulative = 1.400000834e09 smoothSolver: Solving for epsilon, Initial residual = 0.003063504061, Final residual = 2.350539837e07, No Iterations 6 bounding epsilon, min: 4.792808503e11 max: 1947.869938 average: 13.85865537 smoothSolver: Solving for k, Initial residual = 0.397705588, Final residual = 2.981436582e05, No Iterations 7 ExecutionTime = 0.3 s ClockTime = 3 s Time = 3 smoothSolver: Solving for Ux, Initial residual = 6.542876533e05, Final residual = 3.414747811e09, No Iterations 7 smoothSolver: Solving for Uy, Initial residual = 0.008345991815, Final residual = 6.916702663e07, No Iterations 7 smoothSolver: Solving for Uz, Initial residual = 0.4207610645, Final residual = 1.767895306e05, No Iterations 7 GAMG: Solving for p, Initial residual = 0.9875079438, Final residual = 2.876784968e05, No Iterations 5 time step continuity errors : sum local = 72.2530223, global = 7.186872358e10, cumulative = 2.11868807e09 smoothSolver: Solving for epsilon, Initial residual = 1.779790796e10, Final residual = 2.332839125e11, No Iterations 1 bounding epsilon, min: 0.008365059191 max: 926008400.3 average: 10967512.72 smoothSolver: Solving for k, Initial residual = 0.2500923335, Final residual = 2.109144553e05, No Iterations 7 ExecutionTime = 0.3 s ClockTime = 3 s Time = 4 smoothSolver: Solving for Ux, Initial residual = 0.0001047864544, Final residual = 3.802370649e09, No Iterations 7 smoothSolver: Solving for Uy, Initial residual = 1.067786309e09, Final residual = 9.803739005e11, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 5.08984362e07, Final residual = 3.922613063e11, No Iterations 6 GAMG: Solving for p, Initial residual = 0.9999368938, Final residual = 9.488941883e05, No Iterations 974 time step continuity errors : sum local = 94.93563983, global = 2.048071334e05, cumulative = 2.048283203e05 smoothSolver: Solving for epsilon, Initial residual = 1.464161316e10, Final residual = 2.944491158e11, No Iterations 1 bounding epsilon, min: 2.276798111e11 max: 1591232665 average: 14897422.52 smoothSolver: Solving for k, Initial residual = 4.594718889e09, Final residual = 8.271137915e11, No Iterations 3 ExecutionTime = 0.36 s ClockTime = 3 s Time = 5 smoothSolver: Solving for Ux, Initial residual = 5.71021682e05, Final residual = 3.086792287e09, No Iterations 7 smoothSolver: Solving for Uy, Initial residual = 1.395646902e09, Final residual = 6.012380828e11, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 1.899201834e10, Final residual = 3.854897013e11, No Iterations 1 GAMG: Solving for p, Initial residual = 0.9998158918, Final residual = 6.610612207e05, No Iterations 10 time step continuity errors : sum local = 15182.47696, global = 0.005463523176, cumulative = 0.005443040344 smoothSolver: Solving for epsilon, Initial residual = 5.515123834e09, Final residual = 3.612469016e11, No Iterations 4 bounding epsilon, min: 1.555379741e11 max: 3.206587777e+12 average: 2.633791325e+10 smoothSolver: Solving for k, Initial residual = 8.865456493e07, Final residual = 6.354148454e11, No Iterations 7 ExecutionTime = 0.37 s ClockTime = 3 s Time = 6 smoothSolver: Solving for Ux, Initial residual = 4.903075674e05, Final residual = 2.76209214e09, No Iterations 7 smoothSolver: Solving for Uy, Initial residual = 0.001152352045, Final residual = 3.81812229e08, No Iterations 7 smoothSolver: Solving for Uz, Initial residual = 0.00082024583, Final residual = 5.758955053e08, No Iterations 6 GAMG: Solving for p, Initial residual = 0.9912377818, Final residual = 6.390959052e05, No Iterations 10 time step continuity errors : sum local = 5758.516424, global = 183.0669591, cumulative = 183.0615161 smoothSolver: Solving for epsilon, Initial residual = 0.0003505345651, Final residual = 1.672863807e08, No Iterations 7 bounding epsilon, min: 1.131701388e11 max: 7.930001666e+12 average: 8.597395232e+10 smoothSolver: Solving for k, Initial residual = 0.01084036878, Final residual = 7.70259312e07, No Iterations 7 ExecutionTime = 0.38 s ClockTime = 3 s Time = 7 smoothSolver: Solving for Ux, Initial residual = 0.0001017155284, Final residual = 4.623390674e09, No Iterations 7 smoothSolver: Solving for Uy, Initial residual = 0.005494247008, Final residual = 1.851745399e07, No Iterations 7 smoothSolver: Solving for Uz, Initial residual = 0.01430007137, Final residual = 4.569324173e07, No Iterations 6 GAMG: Solving for p, Initial residual = 0.8459483358, Final residual = 3.237544819e05, No Iterations 12 time step continuity errors : sum local = 6614.508604, global = 13.01227121, cumulative = 196.0737873 smoothSolver: Solving for epsilon, Initial residual = 7.049825885e06, Final residual = 3.746246606e10, No Iterations 7 bounding epsilon, min: 7.098149768e12 max: 1.287364284e+14 average: 9.485271478e+11 smoothSolver: Solving for k, Initial residual = 0.001794322734, Final residual = 1.348391127e07, No Iterations 7 ExecutionTime = 0.38 s ClockTime = 3 s Time = 8 smoothSolver: Solving for Ux, Initial residual = 0.001637598567, Final residual = 6.434227911e08, No Iterations 7 smoothSolver: Solving for Uy, Initial residual = 0.1603902233, Final residual = 4.344377787e06, No Iterations 7 smoothSolver: Solving for Uz, Initial residual = 0.0002409532143, Final residual = 1.363044774e08, No Iterations 6 GAMG: Solving for p, Initial residual = 0.623732765, Final residual = 14.43795073, No Iterations 1000 time step continuity errors : sum local = 1923661095, global = 32891581.74, cumulative = 32891777.81 smoothSolver: Solving for epsilon, Initial residual = 8.42542935e11, Final residual = 2.006210096e11, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.4804684285, Final residual = 4.048431869e05, No Iterations 7 ExecutionTime = 0.59 s ClockTime = 4 s Time = 9 smoothSolver: Solving for Ux, Initial residual = 0.000961475335, Final residual = 4.019731076e08, No Iterations 7 smoothSolver: Solving for Uy, Initial residual = 0.05898306748, Final residual = 1.477984489e06, No Iterations 7 smoothSolver: Solving for Uz, Initial residual = 3.178084763e08, Final residual = 2.804660479e11, No Iterations 4 GAMG: Solving for p, Initial residual = 0.9148160798, Final residual = 0.261447627, No Iterations 1000 time step continuity errors : sum local = 7840704.186, global = 7825413.287, cumulative = 40717191.1 smoothSolver: Solving for epsilon, Initial residual = 3.413948522e17, Final residual = 7.529783842e18, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.2539284515, Final residual = 2.201685003e05, No Iterations 7 ExecutionTime = 0.84 s ClockTime = 4 s Time = 10 smoothSolver: Solving for Ux, Initial residual = 0.0009077776947, Final residual = 3.482148807e08, No Iterations 7 smoothSolver: Solving for Uy, Initial residual = 0.1731602652, Final residual = 7.857890645e06, No Iterations 7 smoothSolver: Solving for Uz, Initial residual = 2.73445177e08, Final residual = 2.887628211e11, No Iterations 4 GAMG: Solving for p, Initial residual = 0.000899333075, Final residual = 2.607603027e+68, No Iterations 1000 time step continuity errors : sum local = 9.804016467e+79, global = 4.47494892e+74, cumulative = 4.47494892e+74 smoothSolver: Solving for epsilon, Initial residual = 1, Final residual = 2.155609824e11, No Iterations 1 smoothSolver: Solving for k, Initial residual = 1, Final residual = 9.253973429e05, No Iterations 7 ExecutionTime = 1.33 s ClockTime = 4 s Time = 11 smoothSolver: Solving for Ux, Initial residual = 1.40996752e13, Final residual = 5.783231539e15, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 9.056049294e07, Final residual = 4.438814615e11, No Iterations 6 smoothSolver: Solving for Uz, Initial residual = 1.40996752e13, Final residual = 5.783231539e15, No Iterations 1 Last edited by Tibo99; May 24, 2020 at 11:22. 

May 28, 2020, 08:09 

#2 
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alexander thierfelder
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Hi, do you get an floating point error after t=11? I am not sure about the "+=" maybe try simple "=".


May 28, 2020, 13:49 

#3 
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René Thibault
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I already tried ''+='', ''='' and ''='', and I got the same error.
That is the last part of the log: Code:
Time = 11 smoothSolver: Solving for Ux, Initial residual = 1.40996752e13, Final residual = 5.783231539e15, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 9.056049294e07, Final residual = 4.438814615e11, No Iterations 6 smoothSolver: Solving for Uz, Initial residual = 1.40996752e13, Final residual = 5.783231539e15, No Iterations 1 #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::sigFpe::sigHandler(int) at ??:? #2 ? in /lib/x86_64linuxgnu/libc.so.6 #3 Foam::scalarProduct<double, double>::type Foam::sumProd<double>(Foam::UList<double> const&, Foam::UList<double> const&) at ??:? #4 Foam::PCG::scalarSolve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:? #5 Foam::GAMGSolver::solveCoarsestLevel(Foam::Field<double>&, Foam::Field<double> const&) const at ??:? #6 Foam::GAMGSolver::Vcycle(Foam::PtrList<Foam::lduMatrix::smoother> const&, Foam::Field<double>&, Foam::Field<double> const&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::PtrList<Foam::Field<double> >&, Foam::PtrList<Foam::Field<double> >&, unsigned char) const at ??:? #7 Foam::GAMGSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:? #8 Foam::fvMatrix<double>::solveSegregated(Foam::dictionary const&) at ??:? #9 Foam::fvMatrix<double>::solveSegregatedOrCoupled(Foam::dictionary const&) at ??:? #10 Foam::fvMesh::solve(Foam::fvMatrix<double>&, Foam::dictionary const&) const at ??:? #11 ? at ??:? #12 __libc_start_main in /lib/x86_64linuxgnu/libc.so.6 #13 ? at ??:? Last edited by Tibo99; May 28, 2020 at 19:13. 

May 28, 2020, 16:44 

#4 
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alexander thierfelder
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Maybe the problem is somewhere else, I mean the solver crashes for p calculation and need maximum iterations. And without the source everything works fine? Otherwise check BC.


May 28, 2020, 19:22 

#5 
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René Thibault
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Yes, everything work just fine if I don't apply the source term.
I see what you mean by the calculation for the pressure. The bounding value on epsilon are really high.....and the results on nut also, which is translate to a high value on k too(the picture is not there since I can't upload more than 5 files). Since I use the following paper as a reference and a set of BC from my previous successful simulation without the source term, from what I understand, the BC don't need to be change because the source term on epsilon has been obtain by using the Inlet profile's equation shown in attachment and the BC are base from these profiles. The source term on k vanish. So there is no need to apply a source term on k with fvOptions. Paper: https://www.researchgate.net/publica...n_of_ABL_flows Last edited by Tibo99; May 28, 2020 at 22:01. 

May 29, 2020, 02:44 

#6 
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alexander thierfelder
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Ok theres are now really just guesses...maybe first lower your relaxation factors? And you can try to lower yor source with a const factor like 1e1 and look what happens. Do you have any restrictions on the mesh? Maybe refine it.


May 29, 2020, 16:44 

#7 
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René Thibault
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what I use for relaxation is: p=0.2, U=k=e=0.3, then I tried lowering these already and it didn't help. Still doing the same thing.
About multiplying by a factor, like I mentioned in the other thread that we talk together, I mutiplied the function by V[i], which is 1e9 (cells volume=0.001mx0.001mx0.001m) and it did converge. So, it probably safe to say that the term V[i] has been use like a factor at this point. What is limiting me on the mesh resolution is the resource, but I didn't try this option. The computer I use is not that powerful. For sure it is always better having a refined mesh but, Y+=50, which I think is relatively in the good range. Thank again for your suggestion! Stay safe! Regards, Last edited by Tibo99; May 30, 2020 at 15:20. 

June 6, 2020, 14:59 

#8 
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René Thibault
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I revisited the finite volume method and I saw the following formula in attachment.
From what I saw in this formula, I was about right. The source term need to be multiply by the volume of the cell. 

June 6, 2020, 17:41 

#9 
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Herpes Free Engineer
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Some of the new fvOptions related to the ABL modelling in the following link may help for the epsilon/omegabased fvOptions you try to achieve? Have a look at `src/atmosphericModels/fvOptions/*` ?
https://develop.openfoam.com/Develop...e_requests/363 Hope this helps.
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June 6, 2020, 19:08 

#10 
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René Thibault
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Thank for the information!
I was trying to figure how the whole thing work with the 'fvOptions' framework by trying a simple case with a 'k' uniform profile. Since I passed this step, my main goal has always been to implement an neutral ABL with a nonuniform 'k' and 'e' profile at the Inlet (varies with z). That give a bit more flexibility of matching wind tunnel results, which I want to achieve (for instance: https://www.sciencedirect.com/scienc...67610508001815). That involve having new set of source term and BC. Again, thank for the link. But, from what I've seen quickly is that the package is design for uniform 'k' profile which it don't apply in my case for the reason mentioned above. Even though, I always save good reference. Best regards, 

June 6, 2020, 20:25 

#11 
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Hi,
Is there any reason why you think `k` is uniform? `k`input can be spatiotemporal variant if it is a volScalarField or PatchFunction1<scalar> type. As far as I see, `k`input of any of these functionalities is either of them. Do I miss something? Thanks.
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June 6, 2020, 22:21 

#12 
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René Thibault
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From what I have noticed and understand in the literature is that using the ke turbulence model for neutral ABL (steadystate), without any modification of the transport equation, the 'k' profile is uniform (spike can appear close to the wall though but become uniform after) and follow the relationship u*^2/Cmu^(1/2) and 'epsilon' u*^3/(kappa*(z+z0)). Specific BC at the Top and Bottom must be added if you want to match the velocity profile U obtain at the Outlet compare to the one used at the Inlet. (see: https://onlinelibrary.wiley.com/doi/....1002/fld.2709)
If I want to change the 'k' profile from uniform to a custom profile/log profile at the Inlet, often used to match wind tunnel results (see the paper I linked in the previous post I did), to obtain a neutral ABL and having the corresponding results at the Outlet, there is 2 options in order to reflecting these new conditions at the Inlet: 1 Changing the transport equation, 2 Adding a source term to the original transport equation (see: https://www.researchgate.net/publica...n_of_ABL_flows). Obviously, the BC at the Top and Bottom must be different also. So, what I have seen from the results presented for 'k' in the link you shared is that you can see what we call the 'spike' and then it become basically uniform. So, this make me think that the transport equation, the fvOptions and the wall functions are not adapted for a new type of 'k' profile that I'm looking for at the Inlet. 

June 7, 2020, 12:14 

#13 
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René Thibault
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Hi @Nasim99!
No problem. If you find something new or if you find something that I said is wrong and you can confirm it, don't hesitate to comment. If you try to do something similar, it would be nice to compare and share the BC. It don't converge right now and since I confirmed that I use the right source term for my case, I think the issue is from the BC. The only thing I wondering is, if it's possible to use Cmu constant if 'k' is nonuniform(varies with 'z') and adding a source term instead of modifying the transport equation? If someone could confirm that, it would be appreciated. Regards, Last edited by Tibo99; June 8, 2020 at 00:58. 

June 30, 2021, 13:22 

#14 
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Kabir Shariff
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Hello,
I want to apply a source term to the kepsilon model using the fvOptions ScalarcodedSource. Attached herewith is the source term I want to apply from the literature. This source term is applied in a particular location defined as cellZone in topoSet (see attached schematic) I first applied the source term to the k field only to verify the code is ok before adding the epsilon source. my problem is that The k & epsilon becomes zero just after few cells from the inlet (see attached file kSource.csv) but the fields gives good result without the source terms the source term is applied on the cellzone zone1 as shown in the logfile below. how can I rectify the problem please? is my code ok? attached herewith is my fvOptions code for the kSource Code:
kSource { type scalarCodedSource; selectionMode cellZone; cellZone zone1; fields (k); name kSource; codeCorrect #{ #}; codeConstrain #{ #}; codeAddSup #{ const scalar epsIn_ = 1.38e4; // 5% const vectorField& CellC = mesh_.C(); scalarField& kSource = eqn.source(); // Apply the source // Only apply when we have reached the start time forAll(CellC, i) { kSource[i] += epsIn_; }; #}; } Code:
Selecting finite volume options type actuationDiskSource Source: disk1  selecting cells using cellSet actuationDisk1  selected 1552 cell(s) with volume 0.00596923076923  selecting cells using cellSet actuationDisk1  creating actuation disk zone: disk1  force computation method: Froude Selecting finite volume options type scalarCodedSource Source: kSource  selecting cells using cellZone zone1  selected 32980 cell(s) with volume 0.198724573946 Starting time loop turbulenceFields turbulenceFields: storing fields: turbulenceProperties:I weight field = none surfaceFieldValue Uupstream: operation = weightedAreaAverage weight field = none Time = 1 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 0.0449048902513, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.999982619441, Final residual = 0.024345582838, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 0.0884208859647, No Iterations 2 GAMG: Solving for p, Initial residual = 1, Final residual = 0.000968185944403, No Iterations 124 time step continuity errors : sum local = 4.3030486421e05, global = 2.0809324322e05, cumulative = 2.0809324322e05 smoothSolver: Solving for epsilon, Initial residual = 0.149887418611, Final residual = 0.0111000171302, No Iterations 2 Using dynamicCode for fvOption::kSource at line 37 in "/dlocal/run/8723855/constant/fvOptions.kSource" Could not load "/dlocal/run/8723855/dynamicCode/platforms/linux64GccDPInt32Opt/lib/libkSource_9ec1fe8a1a78c2055ca6aaec53cc716f66c67a36.so" /dlocal/run/8723855/dynamicCode/platforms/linux64GccDPInt32Opt/lib/libkSource_9ec1fe8a1a78c2055ca6aaec53cc716f66c67a36.so: cannot open shared object file: No such file or directory Creating new library in "dynamicCode/kSource/platforms/linux64GccDPInt32Opt/lib/libkSource_9ec1fe8a1a78c2055ca6aaec53cc716f66c67a36.so" Invoking wmake libso /dlocal/run/8723855/dynamicCode/kSource wmake libso /dlocal/run/8723855/dynamicCode/kSource ln: ./lnInclude dep: codedFvOptionTemplate.C Ctoo: codedFvOptionTemplate.C ld: /dlocal/run/8723855/dynamicCode/kSource/../platforms/linux64GccDPInt32Opt/lib/libkSource_9ec1fe8a1a78c2055ca6aaec53cc716f66c67a36.so Selecting finite volume options type kSource Source: kSource  selecting cells using cellZone zone1  selected 32980 cell(s) with volume 0.198724573946 smoothSolver: Solving for k, Initial residual = 0.999999999999, Final residual = 0.0825490627951, No Iterations 3 bounding k, min: 0.350071661333 max: 0.0575828573434 average: 0.0708006843692 ExecutionTime = 15.84 s ClockTime = 20 s Time = 2 smoothSolver: Solving for Ux, Initial residual = 0.871096205218, Final residual = 0.0145172664649, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 0.4664537379, Final residual = 0.0126773675555, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.495367135106, Final residual = 0.042222418612, No Iterations 1 GAMG: Solving for p, Initial residual = 0.0194949736121, Final residual = 1.7095166458e05, No Iterations 108 time step continuity errors : sum local = 0.000309894273643, global = 9.41105615543e05, cumulative = 7.33012372323e05 smoothSolver: Solving for epsilon, Initial residual = 0.59019740074, Final residual = 4.25091897642e13, No Iterations 1 bounding epsilon, min: 2.84968168995e21 max: 0.0383230234325 average: 0.000116078627665 smoothSolver: Solving for k, Initial residual = 7.39851510179e08, Final residual = 7.39851510179e08, No Iterations 0 ExecutionTime = 28.72 s ClockTime = 33 s Time = 3 smoothSolver: Solving for Ux, Initial residual = 0.367516183527, Final residual = 0.00927443461916, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 0.480053536097, Final residual = 0.0305014083565, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 0.6118937401, Final residual = 0.0493583388814, No Iterations 1 GAMG: Solving for p, Initial residual = 0.0600169917322, Final residual = 5.30007958956e05, No Iterations 84 time step continuity errors : sum local = 0.000283702185864, global = 9.06862878832e05, cumulative = 0.000163987525116 smoothSolver: Solving for epsilon, Initial residual = 0.565279741295, Final residual = 3.35983386159e11, No Iterations 1 bounding epsilon, min: 2.84968168995e21 max: 0.502567369362 average: 0.000383204117346 smoothSolver: Solving for k, Initial residual = 2.49344628981e07, Final residual = 2.49344628981e07, No Iterations 0 ExecutionTime = 39.07 s ClockTime = 43 s 

July 1, 2021, 09:29 

#15 
Senior Member
Joachim Herb
Join Date: Sep 2010
Posts: 649
Rep Power: 20 
I think you have to use the correct cell indices like it is done here:
https://github.com/OpenFOAM/OpenFOAM...emplates.C#L62 Code:
kSource[CellC[i]] += epsIn_; 

July 1, 2021, 12:27 

#16  
Member
Kabir Shariff
Join Date: Oct 2016
Location: France
Posts: 53
Rep Power: 8 
Quote:
I made the correction as suggested but I get this error message fvOptions Code:
kSource { type scalarCodedSource; selectionMode cellZone; cellZone zone1; fields (k); name kSource; codeCorrect #{ #}; codeConstrain #{ #}; codeAddSup #{ const scalar epsIn_ = 1.38e4; // 5% const vectorField& CellC = mesh_.C(); scalarField& kSource = eqn.source(); // Apply the source // Only apply when we have reached the start time forAll(CellC, i) { kSource[CellC[i]] += epsIn_; }; #}; } Code:
Creating finite volume options from "constant/fvOptions" Selecting finite volume options type scalarCodedSource Source: kSource  selecting cells using cellZone zone1  selected 32980 cell(s) with volume 0.198724573946 Starting time loop turbulenceFields turbulenceFields: storing fields: turbulenceProperties:I Time = 1 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 0.0449048902513, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.999982619441, Final residual = 0.024345582838, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 0.0884208859647, No Iterations 2 GAMG: Solving for p, Initial residual = 1, Final residual = 0.000968185944403, No Iterations 124 time step continuity errors : sum local = 4.3030486421e05, global = 2.0809324322e05, cumulative = 2.0809324322e05 smoothSolver: Solving for epsilon, Initial residual = 0.149887418611, Final residual = 0.0111000171302, No Iterations 2 Using dynamicCode for fvOption::kSource at line 21 in "/dlocal/run/8724992/constant/fvOptions.kSource" Could not load "/dlocal/run/8724992/dynamicCode/platforms/linux64GccDPInt32Opt/lib/libkSource_57ba7fa6589edcb86f349c030adb191d5977367b.so" /dlocal/run/8724992/dynamicCode/platforms/linux64GccDPInt32Opt/lib/libkSource_57ba7fa6589edcb86f349c030adb191d5977367b.so: cannot open shared object file: No such file or directory Creating new library in "dynamicCode/kSource/platforms/linux64GccDPInt32Opt/lib/libkSource_57ba7fa6589edcb86f349c030adb191d5977367b.so" Invoking wmake libso /dlocal/run/8724992/dynamicCode/kSource wmake libso /dlocal/run/8724992/dynamicCode/kSource ln: ./lnInclude dep: codedFvOptionTemplate.C Ctoo: codedFvOptionTemplate.C /dlocal/run/8724992/constant/fvOptions.kSource: In member function â€˜virtual void Foam::fv::kSourceFvOptionscalarSource::addSup(Foam::fvMatrix<double>&, Foam::label)â€™: /dlocal/run/8724992/constant/fvOptions.kSource:51:23: error: no match for â€˜operator[]â€™ (operand types are â€˜Foam::scalarField {aka Foam::Field<double>}â€™ and â€˜const Foam::Vector<double>â€™) /dlocal/run/8724992/constant/fvOptions.kSource:51:23: note: candidates are: In file included from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/UList.H:652:0, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/List.H:46, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/HashTable.C:33, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/Istream.H:258, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/ISstream.H:42, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/IOstreams.H:40, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/VectorSpace.C:29, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/VectorSpace.H:279, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/Vector.H:48, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/vector.H:42, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/fieldTypes.H:37, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/finiteVolume/lnInclude/fvMatricesFwd.H:34, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/finiteVolume/lnInclude/fvOption.H:50, from /soft/OpenFOAMv2006/OpenFOAMv2006/src/fvOptions/lnInclude/cellSetOption.H:57, from codedFvOptionTemplate.H:105, from codedFvOptionTemplate.C:29: /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/UListI.H:246:11: note: T& Foam::UList<T>::operator[](Foam::label) [with T = double; Foam::label = int] inline T& Foam::UList<T>::operator[](const label i) ^ /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/UListI.H:246:11: note: no known conversion for argument 1 from â€˜const Foam::Vector<double>â€™ to â€˜Foam::label {aka int}â€™ /soft/OpenFOAMv2006/OpenFOAMv2006/src/OpenFOAM/lnInclude/UListI.H:256:17: note: const T& Foam::UList<T>::operator[](Foam::label) const [with T = double; Foam::label = int] inline const T& Foam::UList<T>::operator[](const label i) const ^ 

July 1, 2021, 13:12 

#17 
Senior Member
Joachim Herb
Join Date: Sep 2010
Posts: 649
Rep Power: 20 
I checked again: https://www.openfoam.com/documentati...cescoded.html
mesh_.C() seems to be cell centres cooridnates. You want the list of the cells in the cell set. See the example in this bug report: https://bugs.openfoam.org/view.php?id=2361 Modified with your source: Code:
const labelList& cellIDs = cells(); forAll(cellIDs, i) { label cellI = cellIDs[i]; kSource[cellI] += epsIn_; } 

July 2, 2021, 13:37 

#18  
Member
Kabir Shariff
Join Date: Oct 2016
Location: France
Posts: 53
Rep Power: 8 
Quote:
Thank you very much for the assistance. the simulation is running but the result is sketchy Code:
kSource { type scalarCodedSource; selectionMode cellZone; cellZone zone1; fields (k); name kSource; codeCorrect #{ #}; codeConstrain #{ #}; codeAddSup #{ scalarField& keSource = eqn.source(); const scalar epsIn_ = 1.38e4; const labelList& cellIDs = cells(); forAll(cellIDs, i) { label cellI = cellIDs[i]; keSource[cellI] = epsIn_; } #}; } epsilonSource { type scalarCodedSource; selectionMode cellZone; cellZone zone1; fields (epsilon); name epsilonSource; codeCorrect #{ #}; codeConstrain #{ #}; codeAddSup #{ scalarField& epsilonSource = eqn.source(); const scalar epsIn_ = 1.38e4; const scalar kIn_ = 0.0024; const scalar C_ = 1.92; const labelList& cellIDs = cells(); forAll(cellIDs, i) { label cellI = cellIDs[i]; epsilonSource[cellI] = C_*epsIn_/kIn_; } #}; } The results show the source term added in k & epsilon in the region but reduces to zero afterwards. I attached herewith a comparison between source and no source. Thank you very much. Have a nice weekend 

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