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Showing results 1 to 15 of 15 Search took 0.00 seconds. Search: Posts Made By: makaveli_lcf

Forum: OpenFOAM Running, Solving & CFD February 18, 2011, 08:23

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf Another issue that I found: I plotted the... Another issue that I found: I plotted the pressure residuals for my pimpleFoam solution (see Fig). 6543 schemes are gradSchemes: cellLimited leastSquares 1; div: upwind laplacian and surface...

Forum: OpenFOAM Running, Solving & CFD February 9, 2011, 06:41

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf So, results for 1. Uncorrected 2. Limited... So, results for 1. Uncorrected 2. Limited 0.333 3. Limited 0.5 4. Limited 0.667 5. Corrected 64206421642264236424 !!! Stair type of the plot is used to distinguish iteration values better,...

Forum: OpenFOAM Running, Solving & CFD February 9, 2011, 02:01

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf maddalena the same behavior of the pressure... maddalena the same behavior of the pressure residuals I got when changing gradSchemes from linear (or leastSquares) gradient scheme to its limited version (cell/face(MD)Limited) another my...

Forum: OpenFOAM Running, Solving & CFD February 8, 2011, 09:19

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf maddalena hope I found the reason for your... maddalena hope I found the reason for your poor pressure residuals. Look at the residual level for my pressure equation test with 1. laplacian corrected 2. laplacian limited 0.5 6407 6408

Forum: OpenFOAM Running, Solving & CFD February 8, 2011, 04:05

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf I have mentioned potentialFoam, because it gives... I have mentioned potentialFoam, because it gives some tips about your required non-orthogonal corrections and gives a good first approximation to start with.

Forum: OpenFOAM Running, Solving & CFD February 8, 2011, 03:44

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf maddalena did you try potentialFoam on your... maddalena did you try potentialFoam on your setup? Is it converging till required accuracy?

Forum: OpenFOAM Running, Solving & CFD February 8, 2011, 01:32

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf maddalena one reason for you residuals not... maddalena one reason for you residuals not going very low can be, that your solution is of transient nature. BTW, what the reason to set different non-orthogongonal correction (limited 0.5 an...

Forum: OpenFOAM Running, Solving & CFD February 7, 2011, 05:48

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf My question regarding convergence and residuals... My question regarding convergence and residuals here: why some time k-epsilon equation stop being solved with Tol 10^-5??? Velocity and pressure have settings for the tolerance of order, let's say,...

Forum: OpenFOAM Running, Solving & CFD February 7, 2011, 04:58

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf You are running steady state, there is no point... You are running steady state, there is no point in converging all your equation to the absolute tolerance value, you will reach it with the steady state. Thus 0.05 for p and 0.1 for U (with the...

Forum: OpenFOAM Running, Solving & CFD February 7, 2011, 04:42

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf BTW, your solution is not converged to the steady... BTW, your solution is not converged to the steady state yet. 6377

Forum: OpenFOAM Running, Solving & CFD February 7, 2011, 04:28

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf Also an important comment from Prof. Jasak... Also an important comment from Prof. Jasak regarding the need in nonOrtho corrections in your case http://www.cfd-online.com/Forums/openfoam/69257-nnonorthogonalcorrectors.html#post233066

Forum: OpenFOAM Running, Solving & CFD February 7, 2011, 04:20

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf First div((nuEff*dev(grad(U).T()))) Gauss... First div((nuEff*dev(grad(U).T()))) Gauss linear corrected; // Mistyped Second p { solver GAMG; tolerance 1e-12; relTol 0; // Not...

Forum: OpenFOAM Running, Solving & CFD February 7, 2011, 03:58

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf ... and your fvScheme and fvSolution in the... ... and your fvScheme and fvSolution in the studio please)))

Forum: OpenFOAM Running, Solving & CFD February 7, 2011, 03:44

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf :cool: could U please post more of your log? :cool: could U please post more of your log?

Forum: OpenFOAM Running, Solving & CFD February 7, 2011, 03:40

Replies: 69 pressure eq. "converges" after few time steps Views: 25,751 Posted By makaveli_lcf maddalena Are you doing some internal loops? maddalena Are you doing some internal loops?

Showing results 1 to 15 of 15

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