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 amir.mofakham April 14, 2013 03:12

Oscillating of Interface in VOF method

1 Attachment(s)
Hi
I want to use fluent to simulate the motion of a slug through a 2D channel.
I used
-explicit VOF method
-pressure-velocity Coupling= SIMPLE SPATIAL DISCRETIZATION
-Pressure= Presto
-Momentum= Second Order Upwind
-VOlume Fraction=Geo-Reconstruct

I enable Surface Tension force and wall adhesion. I adjust the value of contact angle and surface tension equal to 135 degree and 0.47.
Any other force is not applied to the slug. First I just want to study the performance of fluent on simulation of two phase flow.
When I run fluent, I find out the interface of slug is oscillating and the value of contact angle is not fixed equal to 135 degree.
How can I get ride of this oscillating?

 kbaker April 14, 2013 12:14

Can you post a picture illustrates the interface motion this will give best understanding for your problem and give more chances to answered it?

kbaker
Quote:
 Originally Posted by amir.mofakham (Post 420368) Hi I want to use fluent to simulate the motion of a slug through a 2D channel. I used -explicit VOF method -pressure-velocity Coupling= SIMPLE SPATIAL DISCRETIZATION -Gradient= least Squares cell based -Pressure= Presto -Momentum= Second Order Upwind -VOlume Fraction=Geo-Reconstruct I enable Surface Tension force and wall adhesion. I adjust the value of contact angle and surface tension equal to 135 degree and 0.47. Any other force is not applied to the slug. First I just want to study the performance of fluent on simulation of two phase flow. When I run fluent, I find out the interface of slug is oscillating and the value of contact angle is not fixed equal to 135 degree. How can I get ride of this oscillating? Thanks in advance :)

 amir.mofakham April 14, 2013 17:52

Quote:
 Originally Posted by kbaker (Post 420460) Can you post a picture illustrates the interface motion this will give best understanding for your problem and give more chances to answered it? kbaker
Hi kbaker