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SDIRK solver convergence #79

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maqsoodrajput opened this issue Jun 29, 2023 · 1 comment
Open

SDIRK solver convergence #79

maqsoodrajput opened this issue Jun 29, 2023 · 1 comment
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integrators Related to numerical integrators question Further information is requested

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@maqsoodrajput
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I am trying to check if the SDIRK solvers in kpp/int/ (with fixed step-size) give correct order of convergence. In all cases (second/third/fourth order solver) I am getting an order ~1 which is strange.
@maqsoodrajput maqsoodrajput added the question Further information is requested label Jun 29, 2023
@RolfSander
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I'm not familiar with SDIRK. I almost always use the Rosenbrock integrator. Anyway, how do you determine the order of convergence? Is there a variable in sdirk.f90, or are you calculating it yourself?

@yantosca yantosca added the integrators Related to numerical integrators label Dec 4, 2023
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@yantosca @RolfSander @maqsoodrajput