Hello, I am new to parallel implementation with FreeFem++, so I started by implementing a Poisson problem using domain decomposition, based on some examples I found online. I first implemented this code in a serial format. In this case I obtain error in the L2 norm or order 10^-14. When I implement …

You are summing contributions on overlapping domains (Th), so you either need to use the partition of unity or compute the contributions on non-overlapping domains, see, e.g., FreeFem-sources/examples/hpddm/minimal-surface-Tao-2d-PETSc.edp at master · FreeFem/FreeFem-sources · GitHub + FreeFem-sourc…

Thank you so much for your suggestions and for your time. I tried the partition of unity and also the scaling of the integrals. Errors are still large compared to the code that is not implemented in parallel. Not sure if you have any additional time to take a look at the implementation of the part…

Of course, the sum of square roots is not the same as the square root of the sum.

Poisson Equation (Parallel Implementation)

General Discussion

prj December 29, 2024, 8:43pm 3

See also Integral in parallel - #4 by prj. Please search the forum.

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Poisson Equation (Parallel Implementation)

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