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Forum: CFX

January 27, 2010, 16:01

Replies: 15

y plus

Views: 4,755

Posted By ghorrocks

The Re does not determine whether the flow is...

The Re does not determine whether the flow is compressible or not, the Mach number does. You can have a supersonic flow with Re=1. I assume your Mach number is low so compressibility effects are...

Forum: CFX

January 26, 2010, 16:20

Replies: 15

y plus

Views: 4,755

Posted By ghorrocks

At what Re number? Is the flow compressible? Do...

At what Re number? Is the flow compressible? Do you need an LES approach?

Forum: CFX

January 23, 2010, 17:34

Replies: 15

y plus

Views: 4,755

Posted By ghorrocks

Examples of where it is critical would include...

Examples of where it is critical would include modelling the separation off an aerofoil. You need good boundary layer resolution for this to get an accurate answer. An example of where it is not...

Forum: CFX

January 23, 2010, 04:22

Replies: 15

y plus

Views: 4,755

Posted By ghorrocks

I do not understand what you are asking. Can you...

I do not understand what you are asking. Can you say the question again more clearly?

Forum: CFX

January 21, 2010, 16:37

Replies: 15

y plus

Views: 4,755

Posted By ghorrocks

When you are doing mesh refinement there are two...

When you are doing mesh refinement there are two regimes. The one everybody thinks about is the convergent regime where as you refine the mesh everything starts converging on the zero-mesh answer. In...

Forum: CFX

January 20, 2010, 16:09

Replies: 15

y plus

Views: 4,755

Posted By ghorrocks

Whether y+ is important or not depends on your...

Whether y+ is important or not depends on your flow. For some flows it is critical, for some it is irrelevant. Read the documentation on mesh generation and numerical accuracy and do a sensitivity...

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