Dear all,
I am trying to solve the NS equation using project methods, and follow the
idea of Step-35 to treat velocity and pressure separately,
but when I am not sure how to implement the correction of the velocity
"u_n_plus_1 = u_star - dt * dp",
where "u_star" and "dp" are from the diffusion step and the projection
step respectively,
since velocity and pressure belong to different finite element spaces.
I tried "get_function_gradients", but end up with
The violated condition was:
static_cast<const FiniteElementData<dim>&>(*this->fe) ==
static_cast<const FiniteElementData<dim>&>(cell->get_fe())
Thanks in advance.
Best,
Jiaqi
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