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Showing results 1 to 7 of 7 Search took 0.00 seconds. Search: Posts Made By: ghorrocks

Forum: CFX May 27, 2010, 19:02

Replies: 17 Buoyant flow Views: 2,866 Posted By ghorrocks Because a periodic side boundary is the least... Because a periodic side boundary is the least constraining. It is also very simple to do (no need to specify anything) and very numerically stable.

Forum: CFX May 26, 2010, 18:16

Replies: 17 Buoyant flow Views: 2,866 Posted By ghorrocks But if the flow is 3D then there is no valid 2D... But if the flow is 3D then there is no valid 2D model of it. You are over constraining the model into an incorrect solution.

Forum: CFX May 25, 2010, 19:08

Replies: 17 Buoyant flow Views: 2,866 Posted By ghorrocks Consider making the side walls periodic... Consider making the side walls periodic boundaries. Also be aware this simulation is almost certainly transient and 3D and if you want to model it correctly you will have to get adequate width to...

Forum: CFX May 19, 2010, 18:37

Replies: 17 Buoyant flow Views: 2,866 Posted By ghorrocks Slip walls are better than no slip, but as long... Slip walls are better than no slip, but as long as the outer walls are far enough away it probably won't matter much. Can you post an image of what you are trying to do? Otherwise I will be...

Forum: CFX May 18, 2010, 19:12

Replies: 17 Buoyant flow Views: 2,866 Posted By ghorrocks I would still recommend you consider using walls... I would still recommend you consider using walls on the sides, or making the inlet include the side walls. Pressure boundaries where the flow goes tangent to the boundary are always convergence...

Forum: CFX May 17, 2010, 22:28

Replies: 17 Buoyant flow Views: 2,866 Posted By ghorrocks If you don't want to suck or blow fluid then why... If you don't want to suck or blow fluid then why not just use a wall?

Forum: CFX May 17, 2010, 18:41

Replies: 17 Buoyant flow Views: 2,866 Posted By ghorrocks You cannot define both the pressure and velocity... You cannot define both the pressure and velocity at a boundary. This is over-defining the boundary. If the opening is perpendicular to gravity then it just has a constant pressure applied. No need...

Showing results 1 to 7 of 7

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