CFD Online Discussion Forums - Entries for March 2017

Wall function usage

Posted March 31, 2017 at 11:57 by kindle

Still a lot to learn

Quote:

Originally Posted by G_German

Since the documentation on the use of wall functions (or BCs for turbulence models in general) in OpenFOAM is rather small I tried to write up a little summary of what is posted in the internet (for kEpsilon, kOmegaSST & SA).
As this may also be interesting to other people and I would be interested in feedback, please find the summary below:

Basics:
If the grid near the wall is fine enough (~y+<1 everywhere and at least 4-5 nodes

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kindle

New Member

Posted in Uncategorized

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viscoelasticFluidFoam for OpenFOAM-2.3.x

Posted March 31, 2017 at 11:54 by kindle

Compiles with OpenFOAM-2.3.x
Benchmark test to do. Usage to be learned

Quote:

Originally Posted by jovani

Hello dear Sita,

There is an old post where you find some hints about transient simulation using the viscoelasticFluidFoam solver:
http://www.cfd-online.com/Forums/ope...fluidfoam.html

To turn off the stabilising technique used in the solver go to the main file of the viscoelastc model you want and do the etaPEff = 0 in the divTau() funtion or take out the

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kindle

New Member

Posted in Solver, Viscoelastic

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PBiCG VS smoothsolver

Posted March 31, 2017 at 11:51 by kindle
Updated May 11, 2017 at 09:21 by kindle (OF-4.x and Foam-extend have implemented this solver)

Namings of libraries are different in OpenFOAM and foam-extend. Well. BiCGStab is needed in U solver of viscoelasticFluidFoam

And this PBiCGStab is implemented also in the OF-4.x and foam-extend (go downstairs from the post). More specifically in OF-4.x it is added (https://github.com/OpenFOAM/OpenFOAM-4.x/commit/1ca4bbf1d288075a76940d58fdf61cbfc49298ee) and in foam-extend it is modified (https://github.com/OpenFOAM/OpenFOAM-dev/commit/c339d3018c98cb67c3455ab09db316c7c0618d5c).
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kindle

New Member

Posted in Solver, Viscoelastic

Views 837 Comments 0 kindle is offline

could not open file for when compiling

Posted March 31, 2017 at 11:46 by kindle

if the problem is :
could not open file ** for xx due to No such file or directory. Maybe it's that after option -I you have a blank space before the INC directory.

Code:

-I$(LIB_USER_SRC)/viscoelasticFluidFoam-1.0-OpenFOAM-2.1.x/src/transportModels/viscoelastic/lnInclude

will do but

Code:

-I $(LIB_USER_SRC)/viscoelasticFluidFoam-1.0-OpenFOAM-2.1.x/src/transportModels/viscoelastic/lnInclude

may not.

Quote:

Originally Posted by Artur

Hi,

I've just built OF 2.2.2 from

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kindle

New Member

Posted in programming, Good habit

Views 840 Comments 0 kindle is offline

Excellent tutorial for debugging

Posted March 10, 2017 at 11:50 by kindle

banana and old-school printing out.

Cool !

Quote:

Originally Posted by wyldckat

OK, so as I mentioned in one of the posts above, having an example case as a basis and using the "banana" trick, here's what I've done (used OpenFOAM 2.3.x for this example):

Made a copy of the tutorial "lagrangian/DPMFoam/Goldschmidt" and ran the utility blockMesh.
Then I had to look at which file needed to modified. All pointed to the file "constant/kinematicCloudProperties".
Now I had

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kindle

New Member

Posted in programming

Views 1520 Comments 0 kindle is offline