Lambda2 or Q in multiRegionFoam

preibie · December 7, 2011, 04:26

Hallo,

I want calculate Lambda2 or Q in the solver chtmultiRegionFoam. The program don't find the velocity Field U because the domain is spitted into solid and fluid regions.

How I can choose the right region?

Preibie

Bernhard · December 7, 2011, 04:49

You can easily upgrade the utility to read the correct U-field. Maybe it is enoug to change the name of the variable there?

preibie · December 7, 2011, 05:01

Hallo,

copy the U field was my first idea but this is the result:

Code:

Time = 2000
    Reading U
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
size 613281 is not equal to the given value of 724217

file: /home/preibisch/OpenFOAM/preibisch-2.0.1/run/Waermerohr/Waermerohr_4/2000/U from line 18 to line 613347.

    From function Field<Type>::Field(const word& keyword, const dictionary&, const label)
    in file /home/preibisch/OpenFOAM/OpenFOAM-2.0.1/src/OpenFOAM/lnInclude/Field.C at line 236.

You mean is is easy to upgrade the utility. How do you do this?

Preibie

Bernhard · December 7, 2011, 05:09

Quote:

Originally Posted by preibie

Hallo,

copy the U field was my first idea but this is the result:

Code:

Time = 2000
    Reading U
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
size 613281 is not equal to the given value of 724217

file: /home/preibisch/OpenFOAM/preibisch-2.0.1/run/Waermerohr/Waermerohr_4/2000/U from line 18 to line 613347.

    From function Field<Type>::Field(const word& keyword, const dictionary&, const label)
    in file /home/preibisch/OpenFOAM/OpenFOAM-2.0.1/src/OpenFOAM/lnInclude/Field.C at line 236.

This means your reading a U file that does not belong to default mesh.

Quote:

You mean is is easy to upgrade the utility. How do you do this?

As usual: Copy the utility to a save place, and rename Lamba2.C to something else, then change the Make/files. By looking into the source code the chtRegion solver, you will find out how you can read the correct U or the correct mesh (look for createFields.H or something similar). Finally you can compile this by typing wmake. Good luck!

preibie · December 7, 2011, 05:54

That the U field dos not match with the mesh is clear because in the solid regions is no U field defined.

I copy the air/constant/polyMesh from the fluid field in the constant/polyMesh and now it works. I will write me a shell script.

Preibie

December 7, 2011, 04:26	Lambda2 or Q in multiRegionFoam	#1
preibie Member Stefan Join Date: Jun 2009 Posts: 67 Rep Power: 16	Hallo, I want calculate Lambda2 or Q in the solver chtmultiRegionFoam. The program don't find the velocity Field U because the domain is spitted into solid and fluid regions. How I can choose the right region? Preibie

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December 7, 2011, 04:49		#2
Bernhard Senior Member Bernhard Join Date: Sep 2009 Location: Delft Posts: 790 Rep Power: 21	You can easily upgrade the utility to read the correct U-field. Maybe it is enoug to change the name of the variable there?

December 7, 2011, 05:54		#5
preibie Member Stefan Join Date: Jun 2009 Posts: 67 Rep Power: 16	That the U field dos not match with the mesh is clear because in the solid regions is no U field defined. I copy the air/constant/polyMesh from the fluid field in the constant/polyMesh and now it works. I will write me a shell script. Preibie