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Way to plot CFL number as a function of number of iterations?

Posted Jun 14, 2018, 10:21 a.m. EDT Computational Fluid Dynamics (CFD) 1 Reply

Prajakta Nakate
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Hello all,

I want to analyse the behaviour of pseudo time step as the simulation progresses. Is there a way to plot Pseudo time-stepping CFL-ratio vs iteration number? Pseudo time-stepping CFL-ratio is seen in the log file. However, I want to visualize how it is changing over number of iterations.

Thank you so much in advance!

Regards, Prajakta

1 Reply Last Post Jun 15, 2018, 10:32 p.m. EDT
Jim Freels mechanical side of nuclear engineering, multiphysics analysis, COMSOL specialist
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Posted: 6 years ago Jun 15, 2018, 10:32 p.m. EDT

The CFL number is available for plotting and during the solution process through the built-in variable CFLCMP. Also, I typically create a separate variable or simply plot the CFLratio = log10(CFLCMP)/4 which is identical to the CFL ratio shown in the log files.

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James D. Freels, Ph.D., P.E.
The CFL number is available for plotting and during the solution process through the built-in variable CFLCMP. Also, I typically create a separate variable or simply plot the CFLratio = log10(CFLCMP)/4 which is identical to the CFL ratio shown in the log files.

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