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

Forum: OpenFOAM Running, Solving & CFD August 29, 2014, 08:54

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi Thanks, Alexander. I did try it as well as... Thanks, Alexander. I did try it as well as smoothSolver and none of them works.

Forum: OpenFOAM Running, Solving & CFD August 29, 2014, 08:42

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi pressure solver Hi all, When the PCG solver is used for p, it took very long time to get converged for a viscoelastic flow. Any idea for speeding up the convergence? Cheers. Raymond

Forum: OpenFOAM Running, Solving & CFD May 22, 2014, 05:19

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi Cheers, Hrv. No luck. Anyway, I suppose that... Cheers, Hrv. No luck. Anyway, I suppose that divTau is the key for the viscoleastic solver no matter what model it is. Anyone dig this part?

Forum: OpenFOAM Running, Solving & CFD May 22, 2014, 04:24

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi I've gone through some papers for the theory.... I've gone through some papers for the theory. What paper do you mean, Hjasak?

Forum: OpenFOAM Running, Solving & CFD May 21, 2014, 17:39

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi what's the paper? what's the paper?

Forum: OpenFOAM Running, Solving & CFD May 21, 2014, 05:45

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi divTau I suppose the divergence of (tau_p + tau_s) should be returned for the momentum equation. However in the viscoelastic foam, it is fvc::div(tau_/rho_, "div(tau)") -...

Forum: OpenFOAM Running, Solving & CFD September 10, 2013, 10:25

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi The ratio of viscosity could be constant. ... The ratio of viscosity could be constant. What I did is Wi=(relaxation time)*(shear rate based on the average velocity at inlet).

Forum: OpenFOAM Running, Solving & CFD September 10, 2013, 10:06

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi It's ascertained that the viscoelasticFoam is... It's ascertained that the viscoelasticFoam is properly set up. Couldn't imagine what scenario it is for the fluids with Wi of million. Nevertheless, it makes sense to me that the viscoelastic models...

Forum: OpenFOAM Running, Solving & CFD September 10, 2013, 08:29

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi viscoelasticFoam divergence problem I noticed that viscoelasticFoam tends to be diverged for cases with high Weissenberg number. Any way to make the solver robust?

Forum: OpenFOAM Running, Solving & CFD August 28, 2013, 07:08

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi No clue about your problem. It would be helpful... No clue about your problem. It would be helpful to give more details.

Forum: OpenFOAM Running, Solving & CFD August 26, 2013, 10:47

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi Weird inlet flow I ran a case w/ cylinder using Oldroyd-B model and specified the fully-developed velocity profile for the inlet and zeroGradient for outlet. The velocity magnitude and streamline was shown in the...

Forum: OpenFOAM Running, Solving & CFD August 26, 2013, 09:18

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi Got it, Sita. Cheers. Got it, Sita. Cheers.

Forum: OpenFOAM Running, Solving & CFD July 29, 2013, 11:06

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi There are four modes for the default... There are four modes for the default PTT-Exponential. If only one mode is concerned, how to disable the rest higher modes?

Forum: OpenFOAM Running, Solving & CFD July 22, 2013, 07:34

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi I see, Sita. Many thanks. I see, Sita. Many thanks.

Forum: OpenFOAM Running, Solving & CFD July 18, 2013, 09:43

Replies: 475 Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam Views: 94,876 Posted By Raymond.Leoi how to get the viscoelastic models' parameters In terms of an example of Verbeeten's data as shown in the attached snapshot, how to get the viscoelastic models' parameters such as etaS, etaP etc.?

Showing results 1 to 15 of 15

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