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Showing results 1 to 6 of 6 Search took 0.00 seconds. Search: Posts Made By: lordvon

Forum: OpenFOAM Running, Solving & CFD October 27, 2010, 11:00

Replies: 15 Velocity blows up suddenly after 30,000+ iterations Views: 4,695 Posted By lordvon Thanks, maddalena! Your diagnosis seems to have... Thanks, maddalena! Your diagnosis seems to have been correct. Since piso is segregated solver (right?) and U was always the first to suddenly mess up, I only changed U to smoothSolver, and...

Forum: OpenFOAM Running, Solving & CFD October 26, 2010, 11:18

Replies: 15 Velocity blows up suddenly after 30,000+ iterations Views: 4,695 Posted By lordvon How dependent is convergence on nsweeps and... How dependent is convergence on nsweeps and ncoarsestlevel? My mesh (ggi, turbomachinery external flow) has about 70000 cells, is ncoarsestlevel=10 appropriate?

Forum: OpenFOAM Running, Solving & CFD October 26, 2010, 10:55

Replies: 15 Velocity blows up suddenly after 30,000+ iterations Views: 4,695 Posted By lordvon Could you give me some pointers on setting up... Could you give me some pointers on setting up GAMG? I see that there are many parameters to define, and I have not used it before. How do I choose the velue for nSweeps for smoothSolver? (I have...

Forum: OpenFOAM Running, Solving & CFD October 26, 2010, 10:27

Replies: 15 Velocity blows up suddenly after 30,000+ iterations Views: 4,695 Posted By lordvon Yes, I am using metis decomposition for 4... Yes, I am using metis decomposition for 4 processors on a single desktop. As for the vector field on the iteration where it first display bad numbers, the whole field is just one color at some...

Forum: OpenFOAM Running, Solving & CFD October 26, 2010, 09:50

Replies: 15 Velocity blows up suddenly after 30,000+ iterations Views: 4,695 Posted By lordvon I stopped it before it could crash when I saw... I stopped it before it could crash when I saw astronomical numbers for velocity magnitude and cumulative time step continuity error. I have attached my fvSchemes file. The last time steps...

Forum: OpenFOAM Running, Solving & CFD October 25, 2010, 17:58

Replies: 15 Velocity blows up suddenly after 30,000+ iterations Views: 4,695 Posted By lordvon Velocity blows up suddenly after 30,000+ iterations Hello all, I am running a 2d turbDyMFoam transient external flow simulation using komegasst and ggi for rotating parts. Qualitatively the simulation is good, all of the flow regimes I have seen in...

Showing results 1 to 6 of 6

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