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-   -   ROE-TURKEL Preconditioning (http://www.cfd-online.com/Forums/su2-shape-design/121450-roe-turkel-preconditioning.html)

Akash C July 29, 2013 06:34

ROE-TURKEL Preconditioning
 
Hi,
I have seen Roe-Turkel preconditioning being mentioned in one of the pictures at SU2's twitter account for low mach numbers. I was wondering how to enable it.
I tried specifying the following in the initial portion of config file for the simulation problem definition(got the clue from Cconfig class)
Code:

ROE_TURKEL_PREC= YES
But this doesn't seem to work and the history graph with and without the preconditioning show the same trend. Or should I change the default false value in the source code and recompile it for the time being.

I am trying an external aerodynamic case using a mach no. of 0.062, using the incompressible formulation I obtained pretty descent results and was hoping for a better correlation with the preconditioning turned on.

Please correct me if I am going wrong.
Akash

economon August 19, 2013 16:09

Hi Akash,

Roe-Turkel preconditioning (ROE_TURKEL_PREC= YES) is set up to work with the compressible solver only when choosing also the Roe method for computing convective fluxes (CONV_NUM_METHOD_FLOW= ROE-1ST_ORDER or 2nd order).

Hope this helps!
Tom


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