A question about the characteristic-based inflow/outflow boundary condition.
Can the characteristic-based inflow/outflow condition be replace by a approximate Riemann Solver such as HLLC?
I'am using FVM. Since in FVM the interface flux is need only, I wonder whether a riemann solver R(U_inner, U_outer) can be used on the boundary instead of implement a tedious char-based inflow/outflow BC.
is this appropriate?
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