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How to define particle-wall restitution coefficient in Eulerian multiphase model ?

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Old   May 31, 2011, 00:35
Default How to define particle-wall restitution coefficient in Eulerian multiphase model ?
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Sangram Roy
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Hi,
I am using Eulerian multiphase along with granular model to simulate a circulating fluidized bed. Where do I specify the value for particle-wall restituition coefficient?

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Old   May 31, 2011, 04:32
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Angie
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hi,

you cannot define it. Instead use specularity coeffcient.
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Old   May 31, 2011, 04:57
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Is there any relation between specularity coefficient and particle-wall restitution coefficient?
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Old   June 1, 2011, 02:59
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I am not sure about this............May be some UDF can be written....
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Old   June 1, 2011, 03:05
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hi,

Many results on simulation have been published using both 'particle-particle restitution coeffcient' and 'particle-wall restitution coeffcient' along with 'specularity coefficient'. I am just wondering how is it possible. Are you sure that one cannot specify 'particle-wall coefficient' ?

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Old   June 1, 2011, 07:29
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Rok Sibanc
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define -> phases, select secondary phase, set and set Granular Temperature Model to Partial Differential Equation

now you can set coefficient of restitution under Boundary Conditions, wall (for second phase) under multiphase.
zino, mohsen0488 and coolgame2004 like this.
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Old   June 1, 2011, 07:32
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Sangram Roy
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Thanks a lot...!
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eulerian multiphase model, fluidized bed, granular flow

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