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Search: Posts Made By: beauty
Forum: FLUENT April 8, 2011, 05:07
Replies: 3
Views: 1,230
Posted By beauty
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...
Forum: OpenFOAM September 26, 2010, 07:50
Replies: 43
Views: 6,163
Posted By beauty
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...
Forum: OpenFOAM Running, Solving & CFD July 6, 2010, 07:35
Replies: 98
Views: 12,101
Posted By beauty
Hi, alberto I see that, thank you for your...

Hi, alberto
I see that, thank you for your reply!:D

beauty
Forum: OpenFOAM Running, Solving & CFD July 5, 2010, 23:09
Replies: 98
Views: 12,101
Posted By beauty
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...
Forum: OpenFOAM June 29, 2010, 08:37
Replies: 5
Views: 2,652
Posted By beauty
openfoam-fluent

Vitor Braga,

what is your result? Looking forward for your results!

Thanks


beauty
Forum: OpenFOAM June 29, 2010, 03:45
Replies: 7
Views: 2,818
Posted By beauty
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:
...
Forum: OpenFOAM June 29, 2010, 03:22
Replies: 7
Views: 2,818
Posted By beauty
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...
Forum: OpenFOAM May 14, 2010, 23:11
Replies: 13
Views: 1,266
Posted By beauty
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
Forum: OpenFOAM May 14, 2010, 05:37
Replies: 13
Views: 1,266
Posted By beauty
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...
Forum: OpenFOAM May 14, 2010, 05:15
Replies: 13
Views: 1,266
Posted By beauty
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...
Forum: OpenFOAM May 12, 2010, 08:08
Replies: 13
Views: 1,266
Posted By beauty
yes, you are right. I just copy one dragModel and...

yes, you are right. I just copy one dragModel and alter it. Then I add my new model to Make/files, and run wmake.Today I compiled the dragmodel following your guidance, everything is ok. Thank you...
Forum: OpenFOAM May 12, 2010, 03:36
Replies: 13
Views: 1,266
Posted By beauty
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...
Forum: OpenFOAM May 10, 2010, 09:57
Replies: 13
Views: 1,266
Posted By beauty
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...
Forum: OpenFOAM May 6, 2010, 02:23
Replies: 5
Views: 4,610
Posted By beauty
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...
Forum: OpenFOAM April 24, 2010, 03:43
Replies: 43
Views: 6,163
Posted By beauty
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....
Forum: OpenFOAM April 23, 2010, 22:09
Replies: 43
Views: 6,163
Posted By beauty
Hi, Alberto Thanks for your timely reply, I...

Hi, Alberto
Thanks for your timely reply, I will try as you suggest, I will upload result as soon as possible.

beauty
Forum: OpenFOAM April 23, 2010, 03:22
Replies: 43
Views: 6,163
Posted By beauty
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...
Forum: OpenFOAM April 22, 2010, 22:27
Replies: 43
Views: 6,163
Posted By beauty
Hi, The checkmesh result of my new mesh is as...

Hi,
The checkmesh result of my new mesh is as follows. The simplefoam with high-level schemes Still does not work. :mad:


Checking patch topology for multiply connected surfaces ...
...
Forum: OpenFOAM April 22, 2010, 21:37
Replies: 12
Views: 2,896
Posted By beauty
I reset the epsilon file, but it does not work....

I reset the epsilon file, but it does not work. When i use the simpleFoam to caculate single phase flow, the wallfunction goes well. But in the simulation of two phase fow applying the...
Forum: OpenFOAM April 22, 2010, 10:21
Replies: 12
Views: 2,896
Posted By beauty
my epsilon field is as follows: dimensions ...

my epsilon field is as follows:
dimensions [ 0 2 -3 0 0 0 0 ];

internalField uniform 0.05;

referenceLevel 0;

boundaryField
{
inlet
Forum: OpenFOAM April 22, 2010, 09:01
Replies: 12
Views: 2,896
Posted By beauty
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...
Forum: OpenFOAM April 16, 2010, 21:09
Replies: 43
Views: 6,163
Posted By beauty
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
Forum: OpenFOAM April 15, 2010, 21:31
Replies: 43
Views: 6,163
Posted By beauty
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
Forum: Fluent UDF and Scheme Programming April 7, 2010, 22:38
Replies: 10
Views: 4,442
Posted By beauty
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...
Forum: Fluent UDF and Scheme Programming April 6, 2010, 07:41
Replies: 10
Views: 4,442
Posted By beauty
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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