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Showing results 1 to 13 of 13 Search took 0.00 seconds. Search: Posts Made By: ghorrocks

Forum: CFX June 4, 2023, 19:00

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks FAQ:... FAQ: https://www.cfd-online.com/Wiki/Ansys_FAQ#Why_are_my_results_inaccurate.3F and:...

Forum: CFX February 18, 2014, 17:21

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks I suspect this is just luck. Reference pressure =... I suspect this is just luck. Reference pressure = 101.3kPa, outlet = 0 is the recommended way to proceed as it reduced round off errors. If changing this to Ref pressure 0kPa, outlet = 101.3kPa...

Forum: CFX February 4, 2014, 01:21

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks No problem :) Your results are not very far... No problem :) Your results are not very far from the experimental results so I would hope mesh sensitivity checks, followed by checking your inlet conditions (especially the turbulence parameters...

Forum: CFX February 3, 2014, 16:19

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks First of all, I have no idea what T106 is. Please... First of all, I have no idea what T106 is. Please don't assume everybody understands your jargon. And your question is an FAQ:...

Forum: CFX April 17, 2013, 18:29

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks Mr CFD's concern is valid - the transition model... Mr CFD's concern is valid - the transition model was developed based on turbulence transition on airfoil sections/turbomachinery blades. So using it for other flows needs to be done with care and a...

Forum: CFX April 17, 2013, 07:52

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks No, the default SST model can handle low Re well.... No, the default SST model can handle low Re well. The only thing is if there is transition you might consider adding the turbulence transition model.

Forum: CFX April 15, 2013, 18:56

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks Be careful here - what Far is talking about is... Be careful here - what Far is talking about is the wall boundary conditions. At the y+=6 approx is the transition from wall function approach to integration to the wall. But this only affects the...

Forum: CFX April 8, 2013, 18:34

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks FAQ:... FAQ: http://www.cfd-online.com/Wiki/Ansys_FAQ#Why_are_my_results_inaccurate.3F

Forum: CFX May 18, 2012, 07:54

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks This is the CFX forum so we cannot help you... This is the CFX forum so we cannot help you specifically with Fluent. I would try this model in CFX as I feel much more comfortable with that solver, but it is your choice. Also note Fluent has lots...

Forum: CFX May 17, 2012, 18:38

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks The reverse flow must be small. I cannot see it... The reverse flow must be small. I cannot see it on your plots. Are you using Fluent? Any difference when you use CFX?

Forum: CFX May 5, 2010, 06:44

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks Yup, that's me :) OK, but sounds like... Yup, that's me :) OK, but sounds like a problem to me. You might be really lucky with large timesteps that the turbulence model can stabilise it but you would need lots of luck. Your best bet...

Forum: CFX May 4, 2010, 18:38

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks This comment is applicable to the default SST... This comment is applicable to the default SST model. It is not applicable to SST with turbulence transition. The turbulence transition model requires a finer mesh, but you should do a sensitivity...

Forum: CFX April 30, 2010, 06:33

Replies: 41 Low Reynolds Number SST Model Views: 16,895 Posted By ghorrocks You results are very impressive, very good... You results are very impressive, very good agreement with experiment, well done. Rather than change the wall function approach why not turn on the turbulence transition model and try to directly...

Showing results 1 to 13 of 13

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