Forum: OpenFOAM Running, Solving & CFD
December 15, 2010, 05:31
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Replies: 197
Views: 47,071
Hello Sebastian,
I am happy that you found...
Hello Sebastian,
I am happy that you found my prev post useful ;)
Now, about the thing:
The solution clearly diverges. Supposing that you do not have any explicit heat sources (like heat...
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Forum: OpenFOAM Running, Solving & CFD
December 14, 2010, 12:16
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Replies: 197
Views: 47,071
Hello Sebastian,
This means you have...
Hello Sebastian,
This means you have something wrong with the case- you perform some division by zero or similar. Go step by step checking all fields, dimensions, values, parameters, schemes,...
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Forum: OpenFOAM Running, Solving & CFD
December 9, 2010, 11:19
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Replies: 197
Views: 47,071
Greetings,
Regarding Sebastian's post:
...
Greetings,
Regarding Sebastian's post:
The chtMultiRegionFoam solver also can work as a steady state one- you just set in the fvScheme file the ddtScheme to be "steadyState". From my brief look...
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Forum: OpenFOAM Running, Solving & CFD
December 9, 2010, 03:51
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Replies: 197
Views: 47,071
Hello Shyam,
regarding first question-...
Hello Shyam,
regarding first question- chtMultiRegionFoam model is based on incompressibility assumption. In that case, I can confirm that I was able to run some simulation. I simply set up the...
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Forum: OpenFOAM Running, Solving & CFD
July 21, 2010, 12:37
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Replies: 197
Views: 47,071
Hi Chris,
from what I remember, the...
Hi Chris,
from what I remember, the directMappedPatch (and possibly other directMapped(...)) require that the neighbour meshes match on the boundary.
This is the only restriction (so one mesh can...
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Forum: OpenFOAM Running, Solving & CFD
July 19, 2010, 11:07
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Replies: 197
Views: 47,071
Hello Chrisi,
I would say, that you simply...
Hello Chrisi,
I would say, that you simply need 3 region types instead of 2 in classical chtMultiRegionFoam.
In that case, you would have solid, fluid and porous (in addition).
In the end, for...
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Forum: OpenFOAM Running, Solving & CFD
July 13, 2010, 13:03
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Replies: 197
Views: 47,071
Hello Ben,
I took another glance at your...
Hello Ben,
I took another glance at your case, here are some thoughts.
I would still include
fvm::ddt(c1_left_or_right)term in the equations. Then set in fvSchemes
ddtSchemes
{
default...
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Forum: OpenFOAM Running, Solving & CFD
July 13, 2010, 08:20
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Replies: 197
Views: 47,071
Hello Ben, Maddalena!
regarding Ben's case- ...
Hello Ben, Maddalena!
regarding Ben's case-
I compiled the solver, unpacked the case.
You modified it quite a bit (fields names c1, D1, S1 do not tell me much, sorry). And the test case does...
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Forum: OpenFOAM Running, Solving & CFD
July 8, 2010, 05:38
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Replies: 197
Views: 47,071
Hello Maddalena,
unfortunately I have not...
Hello Maddalena,
unfortunately I have not yet run a chtMRFoam case with cyclic BC. But I looked at your geometry and after first glance I had the following thought.
You have a very sharp, thin...
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Forum: OpenFOAM Running, Solving & CFD
July 7, 2010, 09:18
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Replies: 197
Views: 47,071
I set things up just as you asked. Zero...
I set things up just as you asked. Zero velocities everywhere. The simulation runs without any problems.
In OF-1.6 before main loop there is:
if (fluidRegions.size())
{
#include...
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Forum: OpenFOAM Running, Solving & CFD
July 7, 2010, 07:29
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Replies: 197
Views: 47,071
Hello Maddalena,
ehh, its time to upgrade my...
Hello Maddalena,
ehh, its time to upgrade my OF release... seems I am getting out of track ;) of course I take back what I said- new chtMRFoam truly takes care of time step itself.
This is a...
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Forum: OpenFOAM Running, Solving & CFD
July 7, 2010, 05:03
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Replies: 197
Views: 47,071
Hello Maddalena,
I must disagree. The...
Hello Maddalena,
I must disagree. The only time step control in chtMultiRegionFoam that I know of is in line 74 of chtMultiRegioFoam.C. And this only takes care of setting time step depending on...
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Forum: OpenFOAM Running, Solving & CFD
July 6, 2010, 12:04
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Replies: 197
Views: 47,071
I am just pointing that the time scale has to...
I am just pointing that the time scale has to match the length scale of the problem.
Simple example: you have a iron rod with 10cm length and want to see the evolution in time of temperature of...
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Forum: OpenFOAM Running, Solving & CFD
June 26, 2010, 12:25
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Replies: 197
Views: 47,071
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Forum: OpenFOAM Running, Solving & CFD
June 24, 2010, 10:56
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Replies: 197
Views: 47,071
Hi,
I just ment using...
Hi,
I just ment using solidWallHeatFluxTemperature ;) of course you should be able to get similar results, if you impose fixedGratient such that:
FG = Qtot / Area
where FG is the FixedGradient...
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Forum: OpenFOAM Running, Solving & CFD
June 24, 2010, 08:33
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Replies: 197
Views: 47,071
Hello,
first, thank you Maddalena for...
Hello,
first, thank you Maddalena for pointing the bug-topic out. The general idea shown there seems very important.
regarding Michea's question.
Remember that the only way to couple regions...
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Forum: OpenFOAM Running, Solving & CFD
June 21, 2010, 07:13
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Replies: 197
Views: 47,071
Hi r08n,
consider that the coupling between...
Hi r08n,
consider that the coupling between regions is done only on "T". All the rest of the fields exist somewhat "separately". You should be allowed to set any "standard" BC.
Thats how I...
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Forum: OpenFOAM Running, Solving & CFD
May 30, 2010, 10:25
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Replies: 197
Views: 47,071
Hello Chrisi,
it seems to me we have a...
Hello Chrisi,
it seems to me we have a typical "division by zero" problem.
Your error is definitely at line 133 of createFluidFields.H. In there you have:
132: Info<< " Adding to...
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Forum: OpenFOAM Running, Solving & CFD
May 28, 2010, 10:16
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Replies: 197
Views: 47,071
I looked up the the case you attached. Do the...
I looked up the the case you attached. Do the following:
run in console:
paraFoam -touch -region fluid
paraFoam -touch -region solid
paraview
and in paraview show only the solidToFluid and...
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Forum: OpenFOAM Running, Solving & CFD
May 28, 2010, 09:54
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Replies: 197
Views: 47,071
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Forum: OpenFOAM Running, Solving & CFD
May 28, 2010, 09:23
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Replies: 197
Views: 47,071
When you use solidWallMixedTemperatureCoupled ...
When you use solidWallMixedTemperatureCoupled the coupling is not only done in the data file (in T) but also at the mesh level, that is in boundary file.
I explained the needed modifications in the...
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Forum: OpenFOAM Running, Solving & CFD
May 28, 2010, 06:47
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Replies: 197
Views: 47,071
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Forum: OpenFOAM Running, Solving & CFD
May 27, 2010, 12:06
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Replies: 197
Views: 47,071
Hi menorka,
I looked through your case,...
Hi menorka,
I looked through your case, unfortunately I can not name what is exactly wrong. But here are some hints that may be helpful:
First some general remarks about the script in the...
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Forum: OpenFOAM Running, Solving & CFD
May 26, 2010, 05:52
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Replies: 197
Views: 47,071
Hi Mechea,
first I have to clear one thing....
Hi Mechea,
first I have to clear one thing. IOobject is just a "tool" which allows you to read and write files. By creating IOdictionary you get access to some kind of data structure which is...
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Forum: OpenFOAM Running, Solving & CFD
May 21, 2010, 14:01
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Replies: 197
Views: 47,071
Hi Michea,
about the hRhoThermos.C I would...
Hi Michea,
about the hRhoThermos.C I would strongly recommend not to modify the original files in OF-1.6 folder.
Remember about "redefinition" feature of C++.
Copy the folder hRhoThermo to your...
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