Calculating Residuals of Field -- CFD Online Discussion Forums

November 20, 2023, 02:19	Calculating Residuals of Field	#1
khoder Alshaar New Member Khoder Alshaar Join Date: May 2021 Posts: 8 Rep Power: 5	Hello, I'm new to OpenFOAM programming. I'd like to know how to write a loop to calculate L1-norm or L2-norm residuals for a specific field at each time step and plot it if possible. For example, we have the following function to calculate RSS after each time step: $RSS=\sqrt{\frac{\sum_{i=1}^{nCells}\left(\frac{\rho_{i}^n-\rho_{i}^{n-1}}{\rho_{i}^{n-1}}\right)^2}{nCells}}$ How to write the loop to calculate RSS value. Thank you in advance.

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