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Forum: CFX

May 21, 2016, 06:03

Replies: 21

mass inflow rate

Views: 2,092

Posted By ghorrocks

I think the laplacian vol weighted smoothing...

I think the laplacian vol weighted smoothing option you chose only applies to surface tension. Not sure on that, but I am sure it does not smooth the general VF field so it is not what you want.
...

Forum: CFX

May 20, 2016, 07:44

Replies: 21

mass inflow rate

Views: 2,092

Posted By ghorrocks

No, the function smears the surface over a few...

No, the function smears the surface over a few element lengths. You need to do the same. Keep the free surface height the same, but use a smearing function so it transitions over a few element...

Forum: CFX

May 19, 2016, 19:47

Replies: 21

mass inflow rate

Views: 2,092

Posted By ghorrocks

Have a look at the free surface generated by your...

Have a look at the free surface generated by your initial condition. It will jump from VF=0 to VF=1 in one element. Run a free surface simulation for a while (any simulation, the tutorial example...

Forum: CFX

May 19, 2016, 06:37

Replies: 21

mass inflow rate

Views: 2,092

Posted By ghorrocks

You are specifying the inlet velocity and volume...

You are specifying the inlet velocity and volume fraction. So any variations you are getting from your expected mass flow rate are likely to be due to the free surface jumping between nodes as you...

Forum: CFX

May 18, 2016, 03:13

Replies: 21

mass inflow rate

Views: 2,092

Posted By ghorrocks

I still do not understand what you are saying....

I still do not understand what you are saying. Please post an image of what you are seeing and your CCL for both runs.

Forum: CFX

May 17, 2016, 21:39

Replies: 21

mass inflow rate

Views: 2,092

Posted By ghorrocks

You are right, I don't think I understand your...

You are right, I don't think I understand your question. Are you saying that the coarse mesh result is accurate but the fine mesh result is not accurate? Or are you saying that on the fine mesh...

Forum: CFX

May 17, 2016, 07:11

Replies: 21

mass inflow rate

Views: 2,092

Posted By ghorrocks

Your mesh is too coarse, so the mesh resolution...

Your mesh is too coarse, so the mesh resolution is affecting results. You need to refine your mesh until it does not affect your results. This is called a mesh sensitivity study.

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