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Search: Posts Made By: ghorrocks
Forum: CFX August 4, 2009, 19:13
Replies: 35
Views: 6,602
Posted By ghorrocks
Hi, The implementation of the GGI interface...

Hi,

The implementation of the GGI interface in CFX is pretty good and should not affect things. The test you describe is a good and simple test for you to do to prove to yourself that it works -...
Forum: CFX August 2, 2009, 00:17
Replies: 35
Views: 6,602
Posted By ghorrocks
I don't understand your question.

I don't understand your question.
Forum: CFX July 29, 2009, 19:02
Replies: 35
Views: 6,602
Posted By ghorrocks
Hi, It's a bit hard to be sure but I suspect...

Hi,

It's a bit hard to be sure but I suspect you have the following problems:

1) You have not cut the rotating domain containing the airfoil out of the rectangular domain. Domains cannot...
Forum: CFX July 28, 2009, 20:30
Replies: 35
Views: 6,602
Posted By ghorrocks
That's why I said it with a big grin on my face....

That's why I said it with a big grin on my face. I don't take myself too seriously and hope your prof doesn't take me too seriously either. But I would like to know why he wants to run a turbulence...
Forum: CFX July 27, 2009, 18:45
Replies: 35
Views: 6,602
Posted By ghorrocks
Unless your airfoil has a turbulence transition...

Unless your airfoil has a turbulence transition (maybe the design has turbulence trips? Or a airfoil design feature to trip turbulence?) then the airfoil is laminar and if you use a turbulence model...
Forum: CFX July 25, 2009, 07:02
Replies: 35
Views: 6,602
Posted By ghorrocks
Why run a turbulence model when the flow is not...

Why run a turbulence model when the flow is not turbulent? Do you like deliberately introducing an error into the simulation? Unless you have an airfoil which has a turbulence transition at Re=5e4...
Forum: CFX July 23, 2009, 18:28
Replies: 35
Views: 6,602
Posted By ghorrocks
This is a very low Re number for an airfoil. I...

This is a very low Re number for an airfoil. I doubt this airfoil will have any turbulence transition so forget about turbulence modelling, switch to laminar flow.
Your Ma number is very small,...
Forum: CFX July 22, 2009, 18:39
Replies: 35
Views: 6,602
Posted By ghorrocks
Hi Josh, Immersed solid is unlikely to be a...

Hi Josh,

Immersed solid is unlikely to be a good approach for airfoil modelling. It does not allow capturing of the airfoil boundary layer very well. What Re number is it running at? What Mach...
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