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what does relaxation collision number mean in dsmcFoam???

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Old   July 23, 2013, 23:14
Default what does relaxation collision number mean in dsmcFoam???
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dear foamers
I am using dsmcFoam,in the tutorials wedge15ma5,there is a dsmcproperties,in there,what does relaxtion collision number mean??and its function??
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Old   August 4, 2016, 09:20
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Ruan Passos
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This is related to Larsen-Borgnakke model. I have simulated the Bird's horizontal flat plate and my results only agree when i changed VariableHardSphere to LarsenBorgnakkeVariableHardSphere, choosing 5.0 for the relaxation collision number:

// Binary Collision Model
// ~~~~~~~~~~~~~~~~~~~~~~

BinaryCollisionModel LarsenBorgnakkeVariableHardSphere;

Tref 273;
relaxationCollisionNumber 5.0;
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