Hi, I am new to FreeFem and PETSc and need some help. I want to solve a time dependent stokes equation, where the righthandside is updated with the old velocity uold in each iteration step. Until the time loop everything works fine but then I get the error "Error line number 63, in file petsc-stoke…

The error is: 63 : rhs = vPbf(def(u) [u, uB, uC],Wh) error operator <6C_args>, <7E_Array>, <PP5v_fes> The fix is: 63 : rhs = vPbf(0,Wh); Like your line 46.

Stokes with time stepper - PETSc

General Discussion

rirane July 11, 2023, 8:45am 7

Thank you for the clarification. Now everything seems to work fine!
petsc-stokes.edp (1.7 KB)

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Stokes with time stepper - PETSc

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