CFD Online Discussion Forums - Lambda2 or Q in multiRegionFoam

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Lambda2 or Q in multiRegionFoam

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

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

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

Quote:

Originally Posted by preibie (Post 334982)

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!

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