Forum: OpenFOAM Running, Solving & CFD
March 13, 2014, 20:10
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Replies: 475
Views: 95,267
Hello Heliana,
I've never heard about a...
Hello Heliana,
I've never heard about a "magic" rule to choose an optimal relaxation factor, it depends on each case and can be changed along the simulation time. On the other hand, "0" makes not...
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Forum: OpenFOAM Running, Solving & CFD
October 24, 2012, 06:14
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Replies: 475
Views: 95,267
Hi Amin,
I never needed this yet. A possible...
Hi Amin,
I never needed this yet. A possible way: If you have solvent viscosity (etaS != 0) sum up the solvent and polymer stress to get the total stress. The polymer is just tau returned back by...
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Forum: OpenFOAM Running, Solving & CFD
June 17, 2012, 16:57
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Replies: 475
Views: 95,267
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Forum: OpenFOAM Running, Solving & CFD
May 9, 2012, 19:19
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Replies: 475
Views: 95,267
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Forum: OpenFOAM Running, Solving & CFD
May 6, 2012, 16:02
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Replies: 475
Views: 95,267
viscoelasticFluidFoam for OpenFOAM-2.1.x
Hello Dear Foamers,
Bellow you find a ported version of the viscoelasticFluidFoam solver for the OpenFOAM-2.1.x. The actual version found on OpenFOAM-1.6-ext do not compile in the OpenFOAM-2.1.x...
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Forum: OpenFOAM Running, Solving & CFD
February 23, 2012, 10:22
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Replies: 475
Views: 95,267
Hello to everyone,
About the boundary...
Hello to everyone,
About the boundary conditions at wall we have at less three options to use:
1 - zeroGradient: a zero order approximation from internal field to boundaries. It is necessary to...
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Forum: OpenFOAM Running, Solving & CFD
August 30, 2011, 11:19
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Replies: 475
Views: 95,267
Hello Amir,
Take a look on multimode.C file,...
Hello Amir,
Take a look on multimode.C file, the bellow code part that do the summation you are looking for. divTau function return the summation of each mode for the momentum equation and tau()...
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Forum: OpenFOAM Running, Solving & CFD
October 24, 2010, 08:31
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Replies: 475
Views: 95,267
Hello Mohsen,
I am not sure about the...
Hello Mohsen,
I am not sure about the problem, but i can contribute with a tip:
try to use fully 3D geometry for your simulation, i.e, do not use the empty BC:
frontAndBack
{
type empty;
}
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Forum: OpenFOAM Running, Solving & CFD
October 19, 2010, 06:54
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Replies: 475
Views: 95,267
Hello Mohsen,
This seems your internal field...
Hello Mohsen,
This seems your internal field for taufirst is wrong, you consider a nine components for internal field, now you are working with the complete stress tensor??
If it is not this...
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Forum: OpenFOAM Running, Solving & CFD
October 18, 2010, 12:01
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Replies: 475
Views: 95,267
Hi Mohsen,
Good, now you need make it...
Hi Mohsen,
Good, now you need make it recursive back to the tree --> multiMode --> viscoelasticLaw ..... This make the other models bad to be used. You need compile only your new model, with all...
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Forum: OpenFOAM Running, Solving & CFD
October 17, 2010, 11:07
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Replies: 475
Views: 95,267
Hello mohsen,
Your problem is with the term...
Hello mohsen,
Your problem is with the term [(omega . a) - (a . omega)] in equation for "a". The return of this operation is a tensorField and not a symmTensorField. Then two options to overcome...
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Forum: OpenFOAM Running, Solving & CFD
June 29, 2010, 21:56
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Replies: 475
Views: 95,267
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Forum: OpenFOAM Running, Solving & CFD
June 25, 2010, 18:19
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Replies: 475
Views: 95,267
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Forum: OpenFOAM Running, Solving & CFD
March 13, 2010, 19:47
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Replies: 475
Views: 95,267
Hello,
Ata,
you need more then only...
Hello,
Ata,
you need more then only "wmake" to compile this, once you are trying compile a LIBRARY (the viscoelastic models library). You must compile without problems using "wmake libso", this...
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Forum: OpenFOAM Running, Solving & CFD
March 10, 2010, 22:05
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Replies: 475
Views: 95,267
Using probe in OpenFOAM
Hello Foamers,
Sometimes we want take the value of some property in any point of the domain for each time step. We do not need save data for each time step, once we can do more easy in OpenFOAM.
...
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Forum: OpenFOAM Running, Solving & CFD
February 20, 2010, 16:07
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Replies: 475
Views: 95,267
Hello Mohsen,
This simulations really takes...
Hello Mohsen,
This simulations really takes some time. I see you changes in relaxation factors, but this is very very small now, this parameters is to make the problem more stable smoothing the...
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Forum: OpenFOAM Running, Solving & CFD
February 7, 2010, 14:23
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Replies: 475
Views: 95,267
Hi Mohsen,
You need specifies what OpenFOAM...
Hi Mohsen,
You need specifies what OpenFOAM version are you using.
IF you are using OpenFOAM-1.5-dev the solver is already after you compiles the OF sources.
IF you have other OF them take a...
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Forum: OpenFOAM Running, Solving & CFD
February 6, 2010, 17:29
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Replies: 475
Views: 95,267
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Forum: OpenFOAM Running, Solving & CFD
February 5, 2010, 22:00
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Replies: 475
Views: 95,267
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Forum: OpenFOAM Running, Solving & CFD
December 14, 2009, 11:47
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Replies: 475
Views: 95,267
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Forum: OpenFOAM Running, Solving & CFD
December 4, 2009, 17:50
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Replies: 475
Views: 95,267
António,
Your etaS in last case is small and...
António,
Your etaS in last case is small and take it to be zero do not will give problems!! I think your convergences problems is the sum of various things in simulation case definition. Your...
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Forum: OpenFOAM Running, Solving & CFD
December 3, 2009, 18:49
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Replies: 475
Views: 95,267
First thank you Hrvoje!!
EVSS is very...
First thank you Hrvoje!!
EVSS is very different, once is needed a change on the constitutive equation (in my master thesis is very clear this point).
And more, I tested the EVSS methodology too...
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Forum: OpenFOAM Running, Solving & CFD
September 18, 2009, 16:55
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Replies: 475
Views: 95,267
Hello Teresa,
As nobody post the results of:...
Hello Teresa,
As nobody post the results of:
"You need take the directory /viscoelastic (OpenFOAM-1.5-dev/src/transportModels/) and put into your OF. Add the line " wmake libso viscoelastic"...
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Forum: OpenFOAM Running, Solving & CFD
September 14, 2009, 09:21
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Replies: 475
Views: 95,267
Hello,
I need to publish any paper with...
Hello,
I need to publish any paper with results of this new implementation before release. With that I can also to test better the solver and make some corrections or improvements if this is...
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Forum: OpenFOAM Running, Solving & CFD
September 10, 2009, 13:47
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Replies: 475
Views: 95,267
Hello,
What you need is a multiphase solver...
Hello,
What you need is a multiphase solver with viscoelastic treatment. The viscoelasticFluidFoam solver doesn't do this, because your formulation is to closed flow of 1 only fluid. You cannot...
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