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Showing results 1 to 14 of 14 Search took 0.00 seconds. Search: Posts Made By: camoesas

Forum: OpenFOAM September 26, 2011, 08:10

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas HI Felix, How could I monitor pressure drop... HI Felix, How could I monitor pressure drop along the domain? Do I have to write an expression or is there already a usable function. Grid convergence is one of my next topics. Thanks for the...

Forum: OpenFOAM September 23, 2011, 10:26

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas Hey Felix, Rereading my post you´re right... Hey Felix, Rereading my post you´re right its not clear enough. I extended the domain with no difference in the solution and convergence. And then I have changed PCG > GAMG and PCiCG > smooth...

Forum: OpenFOAM September 21, 2011, 05:38

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas Felix, youre experience is also right here.... Felix, youre experience is also right here. I have increased omega by 5 and 7 orders of magnitude and convergence is getting better but its still not satisfying. See pictures. But I am...

Forum: OpenFOAM September 21, 2011, 05:23

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas HI, I´ve also made a simulation with... HI, I´ve also made a simulation with wallFunctions. And this simulation is just converging fine. I am using the following boundary conditions: k: inlet: value 7.66e-4 outlet: zeroGradient...

Forum: OpenFOAM September 21, 2011, 05:04

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas and here the velocity for the fully resolved wall... and here the velocity for the fully resolved wall boundary layer

Forum: OpenFOAM September 21, 2011, 05:00

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas HI Felix, Yea youre right! Turbulent... HI Felix, Yea youre right! Turbulent intensity at the Inlet is very low: 0.2% In my opinion really low, but the paper tells so, but remains silent about turbulent length scale. So I had to guess:...

Forum: OpenFOAM September 20, 2011, 11:55

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas Hey Blacksquirrel, I ´ve tested your BC,... Hey Blacksquirrel, I ´ve tested your BC, first I copied the types and then i copied them 1:1 But no converged solution. Why are youre omega values so high? I have computed my values with...

Forum: OpenFOAM September 20, 2011, 10:14

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas here the residuals here the residuals

Forum: OpenFOAM September 20, 2011, 10:12

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas HI Everybody, is it right to set: nut:... HI Everybody, is it right to set: nut: calculated 0 everywhere? How about this explanation: The solution is not converging because the problem is transient. Im getting this impression by...

Forum: OpenFOAM September 20, 2011, 08:35

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas I still get nonsense solutions :confused: But... I still get nonsense solutions :confused: But I have tried my mesh with the setup of the pitzDaily tutorial and it works fine. So I can be sure the mesh´s ok. Now trying to change the turbulence...

Forum: OpenFOAM September 20, 2011, 03:12

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas Hey Felix, thanks for revising once again my... Hey Felix, thanks for revising once again my boundary conditions! I will test them and tell results. Camoesas

Forum: OpenFOAM September 19, 2011, 12:02

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas HI Everybody! I have choosen my boundary... HI Everybody! I have choosen my boundary inlet condition computed by formulas from this page: http://www.cfd-online.com/Wiki/Turbulence_free-stream_boundary_conditions At the wall U, k, omega...

Forum: OpenFOAM September 19, 2011, 04:35

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas HI Felix, HI blacksquirrel, 1) I Have an... HI Felix, HI blacksquirrel, 1) I Have an Reynolds Number of 28000 (calculated with step high) 2) I am using the Paper of Vogel: "Combined Heat Transfer and Fluid Dynamic Measurements Downstream...

Forum: OpenFOAM September 15, 2011, 11:10

Replies: 23 SST SimpleFoam Convergence Problems Views: 6,911 Posted By camoesas SST SimpleFoam Convergence Problems Hey Everybody, I´am trying to simulate the flow over a backwardfacing step. (2D, SST, steadystate) But I don´t get any convergence. (I am looking at residuals and flow solution) I´ve imported the...

Showing results 1 to 14 of 14

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