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Search: Posts Made By: Mojtaba.a
Forum: OpenFOAM Running, Solving & CFD August 28, 2013, 06:21
Replies: 22
Views: 6,670
Posted By Mojtaba.a
Check this link: ...

Check this link:
http://www.engmech.cz/2012/proceedings/pdf/195_Furst_J-FT.pdf


Have you set the right y+ values (Or in other meaning, first cell height) to the correct values?
Provided links...
Forum: OpenFOAM Running, Solving & CFD August 27, 2013, 12:59
Replies: 22
Views: 6,670
Posted By Mojtaba.a
They will effect the final results as they are...

They will effect the final results as they are the values for kinetic energy and dissipation frequency.

Well I have no idea about this.

If you are using wall functions, yes. But right now by...
Forum: OpenFOAM Running, Solving & CFD August 27, 2013, 06:35
Replies: 22
Views: 6,670
Posted By Mojtaba.a
for keOmegaSST, instead of having k and epsilon...

for keOmegaSST, instead of having k and epsilon you have got k and omega.

you have to make a new initial boundary file named omega in your 0 directory and use omegaWallFunction for your wall...
Forum: OpenFOAM Running, Solving & CFD August 26, 2013, 03:12
Replies: 22
Views: 6,670
Posted By Mojtaba.a
Well actually kE is not a very strong model in...

Well actually kE is not a very strong model in simulating near wall flows. Plus your y+ values are high for this purpose.

You have got to use kOmegaSST model alongside with a finer grid to be...
Forum: OpenFOAM Running, Solving & CFD August 23, 2013, 14:25
Replies: 22
Views: 6,670
Posted By Mojtaba.a
Dear Vishal which turbulence model are you using...

Dear Vishal which turbulence model are you using and what are your yPlus values?
Forum: OpenFOAM Running, Solving & CFD August 20, 2013, 06:23
Replies: 22
Views: 6,670
Posted By Mojtaba.a
Well I'm not a turbulence expert, but sure, I...

Well I'm not a turbulence expert, but sure, I will take a look at it :)
Forum: OpenFOAM Running, Solving & CFD August 20, 2013, 05:02
Replies: 22
Views: 6,670
Posted By Mojtaba.a
Hmm, well I am not sure about this but as far as...

Hmm, well I am not sure about this but as far as I know, Cf is called "Fanning friction factor". In the other hand, Fanning friction factor is one-fourth of the Darcy friction factor. As you know...
Forum: OpenFOAM Running, Solving & CFD August 19, 2013, 13:37
Replies: 22
Views: 6,670
Posted By Mojtaba.a
OK, first of all, what do you mean by relative...

OK, first of all, what do you mean by relative roughness? do you mean y0?

I haven't worked with nutkRoughWallFunction for a while and forgot some, I think you define Ks values as an input data.
...
Forum: OpenFOAM Running, Solving & CFD August 16, 2013, 09:29
Replies: 22
Views: 6,670
Posted By Mojtaba.a
Well, I am not familiar with this but maybe you...

Well, I am not familiar with this but maybe you can validate it using analytical turbulent flow velocity profiles which are carried out of Moody's diagram.

hope it helps.
Forum: OpenFOAM Running, Solving & CFD August 16, 2013, 06:06
Replies: 22
Views: 6,670
Posted By Mojtaba.a
Hi, I strongly recommend you to study this...

Hi,

I strongly recommend you to study this article:

Blocken, B., Stathopoulos, T., Carmeliet, J., 2007.
CFD simulation of the atmospheric boundary layer: wall function problems.
Atmospheric...
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