Forum: OpenFOAM Running, Solving & CFD
December 28, 2017, 11:29
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Replies: 13
Views: 18,698
Solved
Yes I indeed solved the problem by making them best decision: not to use openFoam anymore. My time is also money and there is nothing free in the world. Cant afford losing days solving such trivial...
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Forum: STAR-CCM+
January 28, 2015, 09:38
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Replies: 7
Views: 2,630
Dear Mohamed
In starccm+ you have mesh...
Dear Mohamed
In starccm+ you have mesh refinement control under "Custom Controls". These custom controls can be used to locally refine your meshes. These control can be Volume, Surface or even on...
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Forum: STAR-CCM+
January 28, 2015, 07:50
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Replies: 3
Views: 7,483
It is quite straight forward to implement this...
It is quite straight forward to implement this boundary condition in starccm+.
1) You create new field function e.g. called PresCC (Pressure at cell centers) and assign variable $Pressure to it....
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Forum: STAR-CCM+
January 28, 2015, 07:01
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Replies: 7
Views: 2,630
In starccm+ there is directed Mesher for this...
In starccm+ there is directed Mesher for this purpose, I mean to control number of cells along edges. Have you tried it? May I ask why do you need to set or know the exact distribution of the cells?...
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Forum: STAR-CCM+
January 27, 2015, 07:35
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Replies: 7
Views: 2,630
Why do not you do meshing in starccm+ itself?
...
Why do not you do meshing in starccm+ itself?
Then you avoid such kind of problems esp. if they are compatibity issues.
Starccm+ Mesher is much powerful and efficient than any other meshing tool...
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Forum: STAR-CCM+
January 19, 2015, 11:27
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Replies: 8
Views: 1,379
You may use cf = 0.664/Re^(1/2) for Laminar...
You may use cf = 0.664/Re^(1/2) for Laminar boundary layer and 0.0227/Re^(1/7) for turbulent boundary layer. From cf it is quite straight forward to calculate tau_wall and hence y+ using definitions...
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Forum: STAR-CCM+
January 15, 2015, 16:23
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Replies: 8
Views: 1,379
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Forum: STAR-CCM+
January 15, 2015, 16:20
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Replies: 3
Views: 1,691
could you please elaborate more what are you...
could you please elaborate more what are you doing? Perhaps I can help you a bit in this issue as I am working almost everyday on the flow development in pipes.
For a fully developed flow profile,...
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Forum: OpenFOAM
April 23, 2014, 03:06
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Replies: 3
Views: 3,733
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Forum: OpenFOAM
November 4, 2013, 16:35
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Replies: 3
Views: 3,733
does not make much sense to use roughness wall...
does not make much sense to use roughness wall function for LES. Even wall function approach for standard smooth pipe LES is not straight forward and questionable. How can one think of being doing...
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Forum: Main CFD Forum
September 9, 2013, 17:14
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Replies: 40
Views: 203,770
SST and k-epsilon myth
I have heard so many times saying people SST is a better model than epsilon based models. This may be true if you are interested only in the region where the separation occurs especially for...
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Forum: Hardware
December 27, 2012, 09:24
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Replies: 7
Views: 4,907
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Forum: OpenFOAM Running, Solving & CFD
July 13, 2012, 08:06
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Replies: 13
Views: 18,698
read and interpolate CSV data to inlet
Hi Tom
I am facing exactly the same problem as you did. I found OpenFoam quite impressive, however got stuck in handling things.
I have a csv file which contains information on velocity...
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Forum: CFX
March 10, 2010, 02:33
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Replies: 7
Views: 3,180
it not just the magnitude of fluctuating part....
it not just the magnitude of fluctuating part. The small numbers I mentioned earlier were the ratio between fluctuating to mean force. And this ratio always keeps on changing if e.g. one varies mean...
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Forum: CFX
March 9, 2010, 05:43
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Replies: 7
Views: 3,180
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Forum: CFX
March 9, 2010, 05:07
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Replies: 2
Views: 1,303
Hi Stumpy
thanks for this practical idea. I...
Hi Stumpy
thanks for this practical idea. I assume if I make a restart (with -ini and -interp options) from the initial run, the values of AVs from the old simulation will be available in the new...
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Forum: CFX
March 8, 2010, 19:01
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Replies: 7
Views: 3,180
we are only interested in transient or...
we are only interested in transient or fluctuating part of the force. As in our problem, the transient force is the measured variable. In the FSI problem we have, the transient or fluctuating part of...
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Forum: CFX
March 8, 2010, 11:15
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Replies: 7
Views: 3,180
User-defined force transfer across FSI interface
I am solving a transient FSI problem where we have been facing an accuracy issue due to hard-coded "Total Force" transfer to the structure side. Our FSI problem requires only the transient component...
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Forum: CFX
March 8, 2010, 10:59
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Replies: 2
Views: 1,303
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Forum: OpenFOAM
November 24, 2009, 07:08
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Replies: 10
Views: 6,056
Hi Wolfgang
I have a bit tried an FSI case,...
Hi Wolfgang
I have a bit tried an FSI case, however did not get much success. Consequently, I wrote on the forum and unfortunatly didnt get any response. This gave me the impression that there is...
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Forum: OpenFOAM
May 1, 2009, 02:51
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Replies: 1
Views: 2,994
icoFsiFoam case needed
Hi
I am running a case of flexible pipe with icoFsiFoam. However, iterations are diverging after certain time-steps. IT seems something is not right in the choice of boundary conditions in OF esp...
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Forum: CFX
May 1, 2009, 02:18
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Replies: 6
Views: 3,483
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Forum: CFX
April 29, 2009, 15:36
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Replies: 1
Views: 3,241
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Forum: CFX
April 29, 2009, 15:25
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Replies: 6
Views: 3,483
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Forum: CFX
April 29, 2009, 15:04
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Replies: 4
Views: 2,852
Hi
I do not know what is your real objective...
Hi
I do not know what is your real objective behind constant amplitude. There may be a workaround depending on what you finally want to achieve. If you are just interested in just a quasi-steady...
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