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Showing results 1 to 8 of 8 Search took 0.00 seconds. Search: Posts Made By: alberto

Forum: OpenFOAM Running, Solving & CFD June 3, 2011, 04:59

Replies: 24 InterFoam viscosity problem / possible bug Views: 11,114 Posted By alberto Hi, I tried to reproduce your problem... Hi, I tried to reproduce your problem without success. I took the depthCharge2D case, removed the sphere from setFields, so to fill the bottom of the container with phase1, and I set nu = 0.01 (10...

Forum: OpenFOAM Running, Solving & CFD March 19, 2011, 03:12

Replies: 24 InterFoam viscosity problem / possible bug Views: 11,114 Posted By alberto I would say that what you observe (the... I would say that what you observe (the deformation and non-vertical movement) is a consequence of the high velocities you should observe at the interface. There was a discussion on this forum...

Forum: OpenFOAM Running, Solving & CFD March 17, 2011, 13:29

Replies: 24 InterFoam viscosity problem / possible bug Views: 11,114 Posted By alberto Thank you for your updates. Yes, solving the... Thank you for your updates. Yes, solving the momentum predictor is expected to play an important role when viscous stresses are important or dominant. What kind of instability? Altered...

Forum: OpenFOAM Running, Solving & CFD March 13, 2011, 19:25

Replies: 24 InterFoam viscosity problem / possible bug Views: 11,114 Posted By alberto You should plot the initial residuals of the... You should plot the initial residuals of the equations and study their trend to see if the solution of the coupled system converges. The fact that improvements appear reducing the time step seem...

Forum: OpenFOAM Running, Solving & CFD March 13, 2011, 02:55

Replies: 24 InterFoam viscosity problem / possible bug Views: 11,114 Posted By alberto Hi Paul, I believe the problem is of... Hi Paul, I believe the problem is of numerical origin. Did you check the evolution of the residuals and the convergence of your solution? Alberto

Forum: OpenFOAM Running, Solving & CFD March 7, 2011, 14:20

Replies: 24 InterFoam viscosity problem / possible bug Views: 11,114 Posted By alberto Yes, but with such high viscosity ratio, it would... Yes, but with such high viscosity ratio, it would be better to adopt models where each phase has its own equations instead of relying on a mixture approach which is valid when the phase properties...

Forum: OpenFOAM Running, Solving & CFD March 7, 2011, 10:26

Replies: 24 InterFoam viscosity problem / possible bug Views: 11,114 Posted By alberto Indeed, increasing the viscosity ratio so much... Indeed, increasing the viscosity ratio so much makes the whole idea of VOF, based on a mixture approach, questionable... From a numerical point of view, implementing the PIMPLE procedure to allow...

Forum: OpenFOAM Running, Solving & CFD March 4, 2011, 02:34

Replies: 24 InterFoam viscosity problem / possible bug Views: 11,114 Posted By alberto Hi, I can reproduce this on OpenFOAM 1.7.x too.... Hi, I can reproduce this on OpenFOAM 1.7.x too. Did you report it as a bug?

Showing results 1 to 8 of 8

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