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particle - wall collision ( urgent)

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Old   November 8, 2010, 01:47
Default particle - wall collision ( urgent)
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Angie
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hi guys,
I need some assistance on eulerian two fluid model for gas- solid flow . Is it possible to define the coeffcient of restitution for wall - particle collsion. I am not finding that in fluent. Its a different value than particle-partice collsion.
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Old   November 8, 2010, 05:17
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J. Lipowsky
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Hi,
if you're using to the dense discrete particle model, the restitution coefficients of the discrete phase are accessible under
Boundary Conditions -> [BC][Phase: mixture] -> Edit... -> DPM tab

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Old   November 9, 2010, 02:06
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but in eulerian-eulerian approach , how can i specify this???


please reply anyone , its urgent...


Thanks in advance.........
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Old   November 9, 2010, 03:34
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I don't think that a restitution coefficient can be set in pure Euler/Euler, as the solid phase is not fully modeled as a collective of discrete particles in this approach.

Either you'll have to work with the specularity coefficient found under:Boundary Conditions -> [BC][Phase: phase-2] -> Edit... -> Momentum tab
or you'll have to switch to another model which resolves the solid phase as discrete particles (DPM/DDPM).

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