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Showing results 1 to 9 of 9 Search took 0.00 seconds. Search: Posts Made By: fivos

Forum: OpenFOAM August 28, 2010, 07:11

Replies: 40 Numerical error or case error? Flow in a 3D pipe Views: 8,497 Posted By fivos Setting the pressure at the inlet and outlet... Setting the pressure at the inlet and outlet represents a pressure inlet and outlet respectively, isn't it? I understand that pressure in an incompressible solver is used to enforce incompressibility...

Forum: OpenFOAM August 26, 2010, 14:11

Replies: 40 Numerical error or case error? Flow in a 3D pipe Views: 8,497 Posted By fivos Yes the problem is the mesh. Keep in mind that... Yes the problem is the mesh. Keep in mind that using pyramids/wedges/prisms increases numerical viscosity, since the flow is not (generally speaking) aligned with the flow. That' s why such meshes...

Forum: OpenFOAM August 26, 2010, 11:35

Replies: 40 Numerical error or case error? Flow in a 3D pipe Views: 8,497 Posted By fivos Well I have rerun the pipe simulation for L =... Well I have rerun the pipe simulation for L = 0.04 m , R = 0.0015, (p2' - p1') = 0.026, nu = 3.047e-6, for two different meshes, one with refined near wall region and another without refinement (mesh...

Forum: OpenFOAM August 26, 2010, 01:50

Replies: 40 Numerical error or case error? Flow in a 3D pipe Views: 8,497 Posted By fivos @Fernando : I will take a look later for your... @Fernando : I will take a look later for your case, I suppose you are still trying with the same conditions (L = 0.04 m , R = 0.0015, (p2' - p1') = 0.026, nu = 3.047e-6). I will try it once more with...

Forum: OpenFOAM August 20, 2010, 08:56

Replies: 40 Numerical error or case error? Flow in a 3D pipe Views: 8,497 Posted By fivos A final post : I scaled my geometry x 3 for... A final post : I scaled my geometry x 3 for all dimensions, so I would get R = 0.0015m and L = 0.03m. I tried again with Δp'=0.026m2/s2 kinematic pressure, or 26Pa pressure. Expected mean...

Forum: OpenFOAM August 20, 2010, 08:15

Replies: 40 Numerical error or case error? Flow in a 3D pipe Views: 8,497 Posted By fivos Also the residuals for the final steps >> ... Also the residuals for the final steps >> Time = 999 smoothSolver: Solving for Ux, Initial residual = 0.00059155, Final residual = 1.14422e-05, No Iterations 4 smoothSolver: Solving for Uy,...

Forum: OpenFOAM August 20, 2010, 08:08

Replies: 40 Numerical error or case error? Flow in a 3D pipe Views: 8,497 Posted By fivos Finally - controlDict > // * * * * * * *... Finally - controlDict > // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // application simpleFoam; startFrom latestTime; startTime 0;

Forum: OpenFOAM August 20, 2010, 08:05

Replies: 40 Numerical error or case error? Flow in a 3D pipe Views: 8,497 Posted By fivos Boundary conditions > p file // * *... Boundary conditions > p file // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 2 -2 0 0 0 0]; internalField uniform 0;

Forum: OpenFOAM August 20, 2010, 08:03

Replies: 40 Numerical error or case error? Flow in a 3D pipe Views: 8,497 Posted By fivos Dear Fernando, I took a look into OpenFOAM... Dear Fernando, I took a look into OpenFOAM simpleFoam solver for a similar case to the one you describe. I set up a 3d pipe with D = 0.001 m, L =0.01 m and set a pressure difference of 0.032 m2/s2...

Showing results 1 to 9 of 9

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