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Search: Posts Made By: vishal
Forum: OpenFOAM August 24, 2011, 08:15
Replies: 1
Views: 527
Posted By vishal
Hi, I am using a similar kind of problem....

Hi,

I am using a similar kind of problem. But as of now I am not solving for Humidity. If you are still solving this problem you can try for BouyentSimpleFoam.

Did you also use Radiation in...
Forum: OpenFOAM Installation April 20, 2011, 04:05
Replies: 68
Views: 14,624
Posted By vishal
Hi Manoj, Actually if you are not able to...

Hi Manoj,

Actually if you are not able to use parafoam. most porbablly "your paraview is not compiled or you don't have it in Thirdparty" dir.

what you can do is you can download paraview ready...
Forum: OpenFOAM April 4, 2011, 05:18
Replies: 17
Views: 11,111
Posted By vishal
Hi Amol and Maddalena, Thanks a ton for your...

Hi Amol and Maddalena,

Thanks a ton for your advices. actually the issue behind explosion in epsilon value was and bonding warnings was due to lack of knowledge for calculating epsilon.

For...
Forum: OpenFOAM March 10, 2011, 10:15
Replies: 17
Views: 11,111
Posted By vishal
Hi Maddalena, First of all thanks a ton for...

Hi Maddalena,

First of all thanks a ton for your reply.

I dont think BC are problem.

Now for test sake, I have tried the same model for constant velocity inlet

with really small values...
Forum: OpenFOAM March 10, 2011, 05:25
Replies: 17
Views: 11,111
Posted By vishal
Hi, Hear is the check mesh logfile attached....

Hi,

Hear is the check mesh logfile attached.

I have one more query. I never understand what do we exactly mean by time step continuity error. As it suddenly overshoots for my case resulting in...
Forum: OpenFOAM March 10, 2011, 05:15
Replies: 4
Views: 1,216
Posted By vishal
Hi Boger, Thanks a lot, can you please look...

Hi Boger,

Thanks a lot, can you please look into this. I have complete details for my case here

http://www.cfd-online.com/Forums/openfoam/67728-help-k-epsilon-values-turbulence.html
Forum: OpenFOAM Running, Solving & CFD March 10, 2011, 05:13
Replies: 69
Views: 11,854
Posted By vishal
Hi Maddalena, My apologies for...

Hi Maddalena,

My apologies for inconvinience. Can you please help me a bit. I think you have already figured out the way for stable solution. my case details are posted here.
...
Forum: OpenFOAM Running, Solving & CFD March 8, 2011, 11:32
Replies: 69
Views: 11,854
Posted By vishal
Hi Maddalena, Similar situation is happening...

Hi Maddalena,

Similar situation is happening for me. The solution blows up after some time steps. I also have bonding values for K and epsilon. Can you please tell me what did you do to make...
Forum: OpenFOAM Running, Solving & CFD March 8, 2011, 06:30
Replies: 69
Views: 11,854
Posted By vishal
Hi All, I am also trying to do flow...

Hi All,

I am also trying to do flow simulation for a city model. And using Simplefoam form the same. I am also facing similer kind of issues as MALLALENA

please rever to following post for case...
Forum: OpenFOAM Running, Solving & CFD March 8, 2011, 06:26
Replies: 12
Views: 3,877
Posted By vishal
Hi All, I am also trying to do flow...

Hi All,

I am also trying to do flow simulation for a city model. And using Simplefoam form the same. I am also facing similer kind of issues as MALLALENA

please rever to following post for case...
Forum: OpenFOAM Running, Solving & CFD March 8, 2011, 06:25
Replies: 12
Views: 3,877
Posted By vishal
Hi All, I am also trying to do flow...

Hi All,

I am also trying to do flow simulation for a city model. And using Simplefoam form the same. I am also facing similer kind of issues as MALLALENA

please rever to following post for case...
Forum: OpenFOAM Running, Solving & CFD March 8, 2011, 06:24
Replies: 69
Views: 11,854
Posted By vishal
Hi All, I am also trying to do flow...

Hi All,

I am also trying to do flow simulation for a city model. And using Simplefoam form the same. I am also facing similer kind of issues as MALLALENA

please rever to following post for case...
Forum: OpenFOAM Running, Solving & CFD March 3, 2011, 08:56
Replies: 11
Views: 3,011
Posted By vishal
Hi, I know to you it might sound stupid. but...

Hi,

I know to you it might sound stupid. but what I would like to know that is the difference this one and simplefoam ?? I have also compared results of OF and FLUENT for other type od flow and I...
Forum: OpenFOAM January 20, 2011, 07:24
Replies: 17
Views: 11,111
Posted By vishal
I am besically trying to solve for flow...

I am besically trying to solve for flow simulation around a city model. and I am performing validation against wind tunnel and FLUENT results.

As it is a case of flow over surface. I have to use...
Forum: OpenFOAM Pre-Processing January 17, 2011, 18:51
Replies: 27
Views: 34,465
Posted By vishal
Hi, I have some same problem please have a...

Hi,

I have some same problem please have a look at following post... :)



http://www.cfd-online.com/Forums/openfoam/67728-help-k-epsilon-values-turbulence.html
Forum: OpenFOAM January 14, 2011, 07:57
Replies: 17
Views: 11,111
Posted By vishal
Hi paka, Actually my domain is about 2 km in...

Hi paka,

Actually my domain is about 2 km in length and 0.5 km in hight and I have used unstructured mesh. And the city is located at some distance from inlet. The total mesh size is approximately...
Forum: OpenFOAM January 13, 2011, 11:12
Replies: 17
Views: 11,111
Posted By vishal
Hi All, I am trying to simulate flow...

Hi All,

I am trying to simulate flow Simulation over a city model. but here I dont know the charectarastic length. But rhater I have a ratio of (nut/nu). If i am trying to use following formula...
Forum: OpenFOAM December 23, 2010, 05:48
Replies: 4
Views: 1,216
Posted By vishal
Thanks Bogar, But I am using "Newtonian"...

Thanks Bogar,

But I am using "Newtonian" Fluid and "Standard k-epsilon model". but In that case i dont know how to calculate epsilon as i dont know the char. length for the domain.

I was trying...
Forum: OpenFOAM December 16, 2010, 12:21
Replies: 4
Views: 1,216
Posted By vishal
Need some details in SimpleFOAM

Hi All,

I have set up problem to simulate flow over a city using exp prof at inlet. Unfortunately I dnot know the Char. Length for Epsilon calculation. However I have calculated it using values of...
Forum: OpenFOAM December 3, 2010, 07:32
Replies: 8
Views: 1,706
Posted By vishal
Getting following ERROR if i set "setAverage"...

Getting following ERROR if i set "setAverage" field on in above comment. Can someone tell me the reason....... please.... :(:(:(

Time = 5

smoothSolver: Solving for Ux, Initial residual = 0,...
Forum: OpenFOAM November 22, 2010, 11:20
Replies: 8
Views: 1,706
Posted By vishal
This is the boundary condition i have set for...

This is the boundary condition i have set for inlet in U, k and epsilon and using simpleFoam.

KV_North
{
type timeVaryingMappedFixedValue;
setAverage ...
Forum: OpenFOAM October 26, 2010, 14:07
Replies: 21
Views: 3,341
Posted By vishal
Hi, Exactly you have to create .foam file...

Hi,

Exactly you have to create .foam file open it in paraview and the you can post process it as you want. I am using same version as you and its working fine.
Forum: OpenFOAM October 25, 2010, 08:54
Replies: 8
Views: 1,706
Posted By vishal
Is there any utility so that these points can be...

Is there any utility so that these points can be generated from from mesh data.

points can be any arbitary or it should only be cell centers (sounds silly, but want to know if the code...
Forum: OpenFOAM October 25, 2010, 05:12
Replies: 21
Views: 3,341
Posted By vishal
Thanks Bruno....it was helpful....!!!

Thanks Bruno....it was helpful....!!!
Forum: OpenFOAM Running, Solving & CFD October 25, 2010, 04:51
Replies: 4
Views: 763
Posted By vishal
Hi Kerim, In that case. MAy be it comes...

Hi Kerim,

In that case. MAy be it comes because your problem involves sudden rise in pressure / velocity. check for skewness of elements for your mesh. (As i dont know which kind of mesh you are...
Showing results 1 to 25 of 90

 
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