How to define the diameter for second phase in Eulerian model in free surface flow

boa7128 · December 12, 2013, 21:25

Hi, everybody
I have a problem confusing me for a long time. I want to use Eulerian model to compute free surface flow for that the drag force between the two phases can not be neglected. But the diameter must be proposed and I found that the diameter has a great effect on the sharpness of the interface. However, I do not know how to define the diameter for free surface flow, many literature reported that for bubble flow. my condition is different from that, right?

Zaktatir · December 14, 2013, 06:20

Sometimes i use the eulerian appraoch in modeling free surface flow when i want to use anistropic drag and zonal discretization

If you do not have any entrainment or gay supply then set the diameter to the default value that would be a good start. Small diameter results in bigger interfacaial exchange and bigger area concentration which is similiar to the one fluid formulation

December 12, 2013, 21:25	How to define the diameter for second phase in Eulerian model in free surface flow	#1
boa7128 New Member Jianye Chen Join Date: Dec 2013 Posts: 1 Rep Power: 0	Hi, everybody I have a problem confusing me for a long time. I want to use Eulerian model to compute free surface flow for that the drag force between the two phases can not be neglected. But the diameter must be proposed and I found that the diameter has a great effect on the sharpness of the interface. However, I do not know how to define the diameter for free surface flow, many literature reported that for bubble flow. my condition is different from that, right?

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December 14, 2013, 06:20		#2
Zaktatir Senior Member Join Date: Jan 2010 Location: Germany Posts: 268 Rep Power: 17	Sometimes i use the eulerian appraoch in modeling free surface flow when i want to use anistropic drag and zonal discretization If you do not have any entrainment or gay supply then set the diameter to the default value that would be a good start. Small diameter results in bigger interfacaial exchange and bigger area concentration which is similiar to the one fluid formulation