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B in the tutorials pisoFoam (LES) cases

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Old   March 7, 2013, 10:04
Default B in the tutorials pisoFoam (LES) cases
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Jian Zhong
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Dear Foamers,

I am practicing pisoFom solver for the pitzDaily LES case. I notice 'B' is in the time 0 file. But in later time output files, there is no 'B'. I reviewed the 'creatFields.H' file in the pisoFoam solver, but I did not find a declaration for 'B'.

Does anyone know where can I find the declaration of 'B'? And what does 'B' mean?

My best regards,
Jian
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Old   March 7, 2013, 11:50
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Bernhard
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Which LES model are you using?

The tutorial case you refer to uses the oneEqEddy model. If you open oneEqEddy.H (see src folder), you'll see the definition of B (although not used in the code as far as I see).
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Old   March 7, 2013, 13:39
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Yes, I used the oneEqEddy model. In the GenSGSStress.C file in the file of '/apps/OpenFOAM/OpenFOAM-2.1.1/src/turbulenceModels/incompressible/LES/GenSGSStress', I find

B_
(
IOobject
(
"B",
runTime_.timeName(),
mesh_,
IOobject::MUST_READ,
IOobject::AUTO_WRITE
),
mesh_
),

B should be 'AUTO_WRITE' during the running time. But when I run the tutorial case, B is only in the time 0 file. Later, it is gone.
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Old   March 7, 2013, 13:41
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Akbar Mohammadi Ahmar
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Hi Jian Zhong
B in LES models is Stress tensor similar R in RANS models in OpenFoam.
Have you B in 0 Folder?
I think B is in creditfield and you must see that in creditfield B is defined or no?
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Old   March 7, 2013, 17:55
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Jian Zhong
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Quote:
Originally Posted by akbarMohammadiAhmar View Post
Hi Jian Zhong
B in LES models is Stress tensor similar R in RANS models in OpenFoam.
Have you B in 0 Folder?
I think B is in creditfield and you must see that in creditfield B is defined or no?
I test that if I delete B in time 0, pisoFoam (LES, oneEqEddy model) can still run well for the tutorial pitzDaily case.
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Old   March 7, 2013, 18:45
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Bruno Santos
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Greetings to all!

Those "B" files were removed in OpenFOAM 2.1.x in August 2012: https://github.com/OpenFOAM/OpenFOAM...a52c14701a61d2
This was done around 2 months after 2.1.1 was released.

Best regards,
Bruno
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Old   November 28, 2013, 21:51
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ThienMa
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Dear zxj160,

You can modified solver to get R in RANS or B in LES.

view source code Utility R in OpenFOAM to get idea and get B in LES

Thien
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