Laminar flow and wall roughness
I model bingham plastic, unsteady, vof(paste and water)..
the flow is laminar..(never turbulent) well.. the channel I model is micro-channel and the wall roughness is very important. Usually, in the laminar, the wall roughness doesn't affect the flow.. But as I know, in micro-channel, the wall roughness is very important for the pressure drop though the flow is laminar. So I have to change the wall roughness condition, but in fluent the wall roughness condition is not activated in laminar flow... of course I know, the roughness condition is activated in turbulent... But what I need is the method to change the wall roughness condition in laminar flow.. using UDF... is this possible?? or is there other method? well.. is there a method that I set the turbulent setting and give some appropriate value for the laminar flow? I am really wondering that... and, i ask you an advice about whether this is possible or not in fluent setting... please... |
if you set a turbulent viscous and change roughness but you have a laminar flow it doesnt make a significant change
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How to simulate laminar flow
Hello!
I am trying to simulate the jet from a laminar flow pipe. I have not been able to model the geometry to define the two phases of fluids, water and air Can anybody help me? thanks in advance César |
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