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-   -   Low Reynolds Number k-epsilon formulation CFX 10.0 (http://www.cfd-online.com/Forums/cfx/24004-low-reynolds-number-k-epsilon-formulation-cfx-10-0-a.html)

Chris May 19, 2007 11:06

Low Reynolds Number k-epsilon formulation CFX 10.0
 
Hi All,

I am trying to implement a Low Reynolds number turbulence k-epsilon formulation, in order to compare it to a solution obtained with the SST model, using CFX 10.0. However I can't find anywhere where I can choose a low Reynolds number k-epsilon formulation " only the standard k-epsilon is available.

When selecting the standard k-epsilon model it is possible under wall functions to change the y+ value that is set to 11.06 by default. By lowering the value can I then obtain a low Reynolds formulation? " Does anyone know what altering the value will mean?

Thanks in advance Regards Chris


Gert-Jan May 20, 2007 16:52

Re: Low Reynolds Number k-epsilon formulation CFX
 
Do you have CFX-Flo?

Chris May 21, 2007 05:22

Re: Low Reynolds Number k-epsilon formulation CFX
 
I'm not sure but I don't think so. I'm running ANSYS CFX 10.0 I don't know if it is included.

Gert-Jan May 22, 2007 03:32

Re: Low Reynolds Number k-epsilon formulation CFX
 
You should know what you have. CFX-Flo is a starter package. What does your license file say? Can you perform a run and have Pre and Post opened simultaneously?

Gert-Jan

www.bunova.nl

Kim-HM December 8, 2009 00:51

Using CCL
 
CFX option not shown in GUI, it is able to use by CCL

Clik Edit in Command Editor then CCL window will open

you can see below

TURBULENT WALL FUNCTIONS:
Option = Scable
END

you can use low Re-model on every turbulent model by Scable -> Default

if you want other wall funtions option, search 'turbulent wall functions' on help in CFX


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