Storing coefficients with scheme

Paul_l · February 8, 2011, 08:49

I've found this thread on how to store residuals using scheme in Fluent which uses the (solver-residuals) function: http://www.cfd-online.com/Forums/flu...ge-fluent.html

However I'd also like to store the lift, drag and moment coefficients (of a airfoil) in the same way. Is there a similar way to get the coefficients using scheme?

DoHander · February 8, 2011, 09:52

Do you have any particular need for "storing" the coefficients in Scheme ?
Normally you should simply check the Write option in the Force panel and Fluent will write them in files for each iteration.

Do

Paul_l · February 9, 2011, 07:35

Sorry, I probably wasn't too clear about what I wanted: I am doing a batch analysis of a steady state problem and I want to store the coefficients found after each run in a text file. I could just use the regular coefficient history which can be written to file, but I'm not really interested in anything but the last result. That's why I'm looking for a way to get the coefficient values into scheme.

DoHander · February 9, 2011, 08:35

Not a good idea to store just the last value! CL and CD does not converge at the same rate as the residual, so storing the entire history of CL and CD actually makes sense, you can develop a procedure to check if they are converged or you can inspect their history at a later time using a graphical tool.

Do

February 8, 2011, 08:49	Storing coefficients with scheme	#1
Paul_l New Member Paul Levold Join Date: Feb 2010 Posts: 5 Rep Power: 16	I've found this thread on how to store residuals using scheme in Fluent which uses the (solver-residuals) function: http://www.cfd-online.com/Forums/flu...ge-fluent.html However I'd also like to store the lift, drag and moment coefficients (of a airfoil) in the same way. Is there a similar way to get the coefficients using scheme?

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February 8, 2011, 09:52		#2
DoHander Senior Member Join Date: Nov 2009 Posts: 411 Rep Power: 19	Do you have any particular need for "storing" the coefficients in Scheme ? Normally you should simply check the Write option in the Force panel and Fluent will write them in files for each iteration. Do

February 9, 2011, 07:35		#3
Paul_l New Member Paul Levold Join Date: Feb 2010 Posts: 5 Rep Power: 16	Sorry, I probably wasn't too clear about what I wanted: I am doing a batch analysis of a steady state problem and I want to store the coefficients found after each run in a text file. I could just use the regular coefficient history which can be written to file, but I'm not really interested in anything but the last result. That's why I'm looking for a way to get the coefficient values into scheme.

February 9, 2011, 08:35		#4
DoHander Senior Member Join Date: Nov 2009 Posts: 411 Rep Power: 19	Not a good idea to store just the last value! CL and CD does not converge at the same rate as the residual, so storing the entire history of CL and CD actually makes sense, you can develop a procedure to check if they are converged or you can inspect their history at a later time using a graphical tool. Do