Changing the maximum number of Cauchy elements for convergence monitoring

tomaspzapico · May 2, 2024, 09:50

Hi,

I'm trying to increment the number of Cauchy elements for convergence monitoring, but the following error pops up:

Error in "COutput::COutput(const CConfig*, short unsigned int, bool)":
-------------------------------------------------------------------------
Number of Cauchy Elems must be smaller than 1000

Does anybody how can I increase the maximum number of Cauchy elements?

bigfootedrockmidget · May 2, 2024, 16:58

Why do you want more than 1000 Cauchy elements? You can adjust this number in cOutput.cpp and recompile, but again, why?

tomaspzapico · May 3, 2024, 03:42

Thanks. I want to try to see if the accuracy of the results I'm getting improves

bigfootedrockmidget · May 3, 2024, 08:58

It only affects the number of elements that you use to measure the error, it does not change the error itself.
If you want to increase the accuracy of your results, then converge to a lower residual value (at least R=-12 for all variables), use a finer mesh and use a higher order method (for instance MUSCL).

If you want an accurate impression of local errors, you can visualize the local residuals by outputting them to paraview:
OUTPUT_FILES=PARAVIEW

VOLUME_OUTPUT= SOLUTION,PRIMITIVE,RESIDUAL

May 2, 2024, 09:50	Changing the maximum number of Cauchy elements for convergence monitoring	#1
tomaspzapico New Member Tomas Perez Zapico Join Date: Mar 2023 Posts: 14 Rep Power: 3	Hi, I'm trying to increment the number of Cauchy elements for convergence monitoring, but the following error pops up: Error in "COutput::COutput(const CConfig*, short unsigned int, bool)": ------------------------------------------------------------------------- Number of Cauchy Elems must be smaller than 1000 Does anybody how can I increase the maximum number of Cauchy elements?

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May 2, 2024, 16:58		#2
bigfootedrockmidget Senior Member bigfoot Join Date: Dec 2011 Location: Netherlands Posts: 537 Rep Power: 17	Why do you want more than 1000 Cauchy elements? You can adjust this number in cOutput.cpp and recompile, but again, why?

May 3, 2024, 03:42		#3
tomaspzapico New Member Tomas Perez Zapico Join Date: Mar 2023 Posts: 14 Rep Power: 3	Thanks. I want to try to see if the accuracy of the results I'm getting improves

May 3, 2024, 08:58		#4
bigfootedrockmidget Senior Member bigfoot Join Date: Dec 2011 Location: Netherlands Posts: 537 Rep Power: 17	It only affects the number of elements that you use to measure the error, it does not change the error itself. If you want to increase the accuracy of your results, then converge to a lower residual value (at least R=-12 for all variables), use a finer mesh and use a higher order method (for instance MUSCL). If you want an accurate impression of local errors, you can visualize the local residuals by outputting them to paraview: OUTPUT_FILES=PARAVIEW VOLUME_OUTPUT= SOLUTION,PRIMITIVE,RESIDUAL