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Forum: OpenFOAM Running, Solving & CFD January 11, 2015, 01:12
Replies: 37
Views: 7,616
Posted By Dan1788
Hi Likun, I am not entirely sure how the...

Hi Likun,

I am not entirely sure how the extent of perturbation affects the results because I havent really done a parametric study. Usually I have always taken the perturbation to be...
Forum: OpenFOAM Running, Solving & CFD January 5, 2015, 09:15
Replies: 37
Views: 7,616
Posted By Dan1788
Hi Likun, I found the solution of this...

Hi Likun,

I found the solution of this problem by using boxTurb utility in a square duct of the same length as the pipe to generate turbulence. Then mapping the turbulence from the duct to the...
Forum: OpenFOAM Running, Solving & CFD December 2, 2014, 23:26
Replies: 37
Views: 7,616
Posted By Dan1788
Hey, I think because my reynolds number is...

Hey,

I think because my reynolds number is less just by solving the equations without initializing turbulence wont help. But thanks for your help anyways. I am now trying to solve the problem by...
Forum: OpenFOAM Running, Solving & CFD November 27, 2014, 15:10
Replies: 37
Views: 7,616
Posted By Dan1788
Appreciate your help Philipp :-) let me know...

Appreciate your help Philipp :-)

let me know if you happen to find anything.
Forum: OpenFOAM Running, Solving & CFD November 20, 2014, 17:49
Replies: 37
Views: 7,616
Posted By Dan1788
Sure, since the mesh is big if you can give me...

Sure, since the mesh is big if you can give me your email or dropbox ID I can send it to you. As for the pictures I think both are laminar flow just that earlier I used paraview and then Tecplot to...
Forum: OpenFOAM Running, Solving & CFD November 19, 2014, 00:43
Replies: 37
Views: 7,616
Posted By Dan1788
It still does not work, even with the correct...

It still does not work, even with the correct mesh. Thanks for your suggestions nonetheless

Yes I do wall resolved LES. I am not sure about the boundary condition for k at the wall. Conceptually...
Forum: OpenFOAM Running, Solving & CFD November 17, 2014, 23:40
Replies: 37
Views: 7,616
Posted By Dan1788
The problem about the non-orthogonality was...

The problem about the non-orthogonality was Pointwise specific. The way around the problem was having 'renumberMesh -overwrite' before checkMesh.

I have uploaded my case here. You can have a look.
Forum: OpenFOAM Running, Solving & CFD November 16, 2014, 22:54
Replies: 37
Views: 7,616
Posted By Dan1788
Hi Philipp, So I tried my case with the...

Hi Philipp,

So I tried my case with the Smagorinsky model. I initialized k and nuSgs with non-zero values in the internalField. Following is the BC file for k

internalField uniform 1;
...
Forum: OpenFOAM Running, Solving & CFD November 14, 2014, 01:53
Replies: 37
Views: 7,616
Posted By Dan1788
I tried including the following library files in...

I tried including the following library files in my control dict:

libs (
"libOpenFOAM.so"
"libsimpleSwakFunctionObjects.so"
"libswakFunctionObjects.so"
...
Forum: OpenFOAM Running, Solving & CFD November 14, 2014, 01:42
Replies: 37
Views: 7,616
Posted By Dan1788
Thanks a ton for your insight and help Philipp. I...

Thanks a ton for your insight and help Philipp. I input your code from post#3 in my controlDict and I got the following error:
[0] [1] [2] [3]
[1]
[1] --> FOAM FATAL ERROR:
[1] Unknown...
Forum: OpenFOAM Running, Solving & CFD November 12, 2014, 22:15
Replies: 37
Views: 7,616
Posted By Dan1788
Hi Philipp, Refering to your post#2 here is...

Hi Philipp,

Refering to your post#2 here is the log output of my run:
Courant Number mean: 0.318167 max: 0.49787
deltaT = 1.04167e-05
Time = 0.0999792

PIMPLE: iteration 1
DILUPBiCG: ...
Forum: OpenFOAM Running, Solving & CFD November 11, 2014, 22:47
Replies: 37
Views: 7,616
Posted By Dan1788
Thanks for your post Philipp. I am really curious...

Thanks for your post Philipp. I am really curious to know how you achieve turbulence without initializing any at the beginning of the simulation.

What turbulence model do you use and what is the...
Forum: OpenFOAM Running, Solving & CFD November 10, 2014, 22:57
Replies: 37
Views: 7,616
Posted By Dan1788
Hi Philipp, I just realized that the reason...

Hi Philipp,

I just realized that the reason I was not getting any turbulence generated was because I wasnt specifying any manually generated turbulence at the inlet (pardon me. really stupid on my...
Forum: OpenFOAM Running, Solving & CFD November 9, 2014, 01:00
Replies: 37
Views: 7,616
Posted By Dan1788
Question question regarding LES of pipe flow - pimpleFoam

Dear Foamers,

I have started doing an LES of pipe flow using pimpleFoam with cyclic boundary conditions in the streamwise direction to generate turbulent statistics and feed them into a premixed...
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