Forum: FLUENT
April 8, 2011, 06:07
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Replies: 13
Views: 8,707
sampling interval and sampling frequency
dears,
I am solving a time-dependent problem using fluent. Fluent help says "You can set the Sampling Interval such that Data Sampling for Time Statistics can be performed at the specified...
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Forum: OpenFOAM
September 26, 2010, 08:50
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Replies: 43
Views: 12,675
Hi,
I am glad to see the discussion on the...
Hi,
I am glad to see the discussion on the problem of RSM here! Hi, spej, are you simulating the swirl flow in a cyclone? When simulating the flow in a cyclone, I can not get convergence by using...
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Forum: OpenFOAM Running, Solving & CFD
July 6, 2010, 08:35
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Replies: 99
Views: 22,543
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Forum: OpenFOAM Running, Solving & CFD
July 6, 2010, 00:09
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Replies: 99
Views: 22,543
Hi, alberto
I have some problem when using...
Hi, alberto
I have some problem when using twoPhaseEulerFoam to simulate gas-solid two-phase flow in a curved pipe. I want to compare the result with fluent, so I try to use the same BC. But I...
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Forum: OpenFOAM
June 29, 2010, 09:37
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Replies: 5
Views: 4,794
openfoam-fluent
Vitor Braga,
what is your result? Looking forward for your results!
Thanks
beauty
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Forum: OpenFOAM
June 29, 2010, 04:45
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Replies: 7
Views: 5,711
problem with boundary
I also have problems on defining the bounary. For pressure, when using zeroGradient for inlet, everything goes well. After changing zeroGradient to calculated, I get this message:
...
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Forum: OpenFOAM
June 29, 2010, 04:22
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Replies: 7
Views: 5,711
To “using outlet velocity profile as inlet”
For this, the form provides two ways, one is mapFields, and the other is directMappedPatch. With the former, I mapped the whole field, but not outlet to inlet. Maybe I take a wrong understanding, you...
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Forum: OpenFOAM
May 15, 2010, 00:11
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Replies: 13
Views: 2,442
happen to have the same view
Hi
It's happy to see that. I also have the idea to find the original paper:p. Please let me know what's the result.
beauty
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Forum: OpenFOAM
May 14, 2010, 06:37
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Replies: 13
Views: 2,442
To Alberto
Hi, Alberto
After seeing your reply, I check my equation again. The WenYu drag Model I have read in paper is different from the expression in openfoam. I can't write formula here, so I attached a...
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Forum: OpenFOAM
May 14, 2010, 06:15
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Replies: 13
Views: 2,442
To M K
Hi
I didn't encounter the same problem. I am a rookie to openfoam, so I can't give you good solution, I feel so sorry. Maybe the reason is as Alberto said, your time step is too big. I have seen a...
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Forum: OpenFOAM
May 12, 2010, 09:08
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Replies: 13
Views: 2,442
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Forum: OpenFOAM
May 12, 2010, 04:36
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Replies: 13
Views: 2,442
Hi
Thank you for your help. Yes, it is like...
Hi
Thank you for your help. Yes, it is like you said I have to send the magnitude of the relative velocity, which is executed by liftDragCoeffs.H in twoPhaseEulerFoam. Miss the file...
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Forum: OpenFOAM
May 10, 2010, 10:57
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Replies: 13
Views: 2,442
Problem about drag model in twoPhaseEulerFoam
Hi, friends
I encountered some problems about the drag models in the twoPhaseEulerFoam solver.
1)First one is about the calculation of particle Remolds number in drag models. For example, in...
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Forum: OpenFOAM
May 6, 2010, 03:23
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Replies: 10
Views: 16,600
need help
Hi, mchurchf
After reading your description of buoyantBoussinesPisoFoam, I am still puzzled about the meaning of the red line in the following code, which is in the UEqn of twophaseEulerFoam.I can...
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Forum: OpenFOAM
April 24, 2010, 04:43
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Replies: 43
Views: 12,675
RSM can not get convergence!
Hi, Alberto
After changing the schemes as your advice, the simpleFoam with RNGkepsilon goes well and the result also improved.;) But the simpleFoam with RSM still can not get convergence....
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Forum: OpenFOAM
April 23, 2010, 23:09
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Replies: 43
Views: 12,675
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Forum: OpenFOAM
April 23, 2010, 04:22
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Replies: 43
Views: 12,675
Hi,
This is my fvsolution and fvscheme.My...
Hi,
This is my fvsolution and fvscheme.My turbulent model is RNGkepsilon model. Once I change the scheme of div(phi,k) and div(phi,epsilon) to other high order scheme, it display "floating-point...
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Forum: OpenFOAM
April 22, 2010, 23:27
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Replies: 43
Views: 12,675
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Forum: OpenFOAM
April 22, 2010, 22:37
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Replies: 12
Views: 5,755
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Forum: OpenFOAM
April 22, 2010, 11:21
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Replies: 12
Views: 5,755
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Forum: OpenFOAM
April 22, 2010, 10:01
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Replies: 12
Views: 5,755
I have the same problem when using...
I have the same problem when using twophaseEulerFoam,
gradientInternalCoeffs cannot be called for a genericFvPatchField (actual type epsilonWallFunction) on patch wall of field epsilon in file...
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Forum: OpenFOAM
April 16, 2010, 22:09
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Replies: 43
Views: 12,675
Hi, alberto
Thank you for your advice. I...
Hi, alberto
Thank you for your advice. I will rebuild my mesh and do my best to avoid skewed cells as well as non-orthogonal cells. If it works, I give a feekback.:p
beauty
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Forum: OpenFOAM
April 15, 2010, 22:31
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Replies: 43
Views: 12,675
Hi,
My domain is complex, I generate the...
Hi,
My domain is complex, I generate the mesh with gambit. After performing checkMesh, the results display as follows:
Create time
Create polyMesh for time = 0
Time = 0
Mesh stats
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Forum: Fluent UDF and Scheme Programming
April 7, 2010, 23:38
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Replies: 10
Views: 7,966
Hi
Flash evaporation is pressure-driven...
Hi
Flash evaporation is pressure-driven evaporation. When the saturated liquid (for example, liquid Hydrogen under high pressure) is released into atmosphere, most or all of the liquid immediately...
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Forum: Fluent UDF and Scheme Programming
April 6, 2010, 08:41
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Replies: 10
Views: 7,966
Hi
Thank you for your suggestion. In my...
Hi
Thank you for your suggestion. In my opinion, the mechanism of evaporation in the cavitation is different from flash evaporation. Maybe I am wrong, I will learn about the cavitation-models. Are...
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