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Search took 0.00 seconds. Search: Posts Made By: ghorrocks
Forum: CFX December 28, 2017, 17:12
Replies: 24
Views: 1,699
Posted By ghorrocks
You cannot fix the velocity and pressure at a...

You cannot fix the velocity and pressure at a boundary. If you know the velocity then you probably know the flow rate. Then you can apply a type of pressure boundary at the inlet and a type of mass...
Forum: CFX December 19, 2017, 16:52
Replies: 24
Views: 1,699
Posted By ghorrocks
My suggestions: * Use the default SST...

My suggestions:

* Use the default SST turbulence model unless you have a good reason not to.

* Do a mesh sensitivity study to determine the first element size which works for your case. Do not...
Forum: CFX December 18, 2017, 18:56
Replies: 24
Views: 1,699
Posted By ghorrocks
Until you get inflation layers onto it mesh...

Until you get inflation layers onto it mesh refinement is pointless. Once you have sorted the inflation layers you will need to determine:
* What first element size you require
* How thick an...
Forum: CFX December 18, 2017, 16:46
Replies: 24
Views: 1,699
Posted By ghorrocks
You have used a coarse mesh. You will not get...

You have used a coarse mesh. You will not get accurate results on a coarse mesh.
Forum: CFX December 6, 2017, 21:16
Replies: 24
Views: 1,699
Posted By ghorrocks
You have a reference pressure of 1 [bar] and the...

You have a reference pressure of 1 [bar] and the outlet is set to 1 [bar] relative pressure. That means the outlet is set to 2 bar absolute. Did you intend this?

You should also change it so the...
Forum: CFX December 6, 2017, 19:24
Replies: 24
Views: 1,699
Posted By ghorrocks
I have looked at your output file. I see lots of...

I have looked at your output file. I see lots of issues:
* You have a boundary "sides" which is adiabatic and free slip. This should probably be a symmetry boundary which is mathematically the same...
Forum: CFX December 6, 2017, 17:08
Replies: 24
Views: 1,699
Posted By ghorrocks
Opaque is right - the solution may not be fully...

Opaque is right - the solution may not be fully converged. So ensure it is fully converged before you start drawing conclusions from it. Also check the boundary conditions are correct.

But I would...
Forum: CFX December 5, 2017, 19:27
Replies: 24
Views: 1,699
Posted By ghorrocks
I don't have time to go through your setup in...

I don't have time to go through your setup in detail.

Just post your output file as an attachment to the post. That is all we need to know for your setup.

My previous post linked to the FAQ and...
Forum: CFX December 5, 2017, 17:51
Replies: 24
Views: 1,699
Posted By ghorrocks
You do not appear to have the top and bottom...

You do not appear to have the top and bottom faces as periodic boundaries. Is this what you intend?

Please attach your CCL or output file. Screen dumps of your setup are unreadable.

Your...
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