'subsonic_outlet' ghost: characteristic-based subsonic outflow.
The outgoing Riemann invariant is extrapolated from the interior; density is recovered isentropically from the prescribed back pressure. Falls back to zero-gradient on a non-physical ghost.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| type(solver_state_t), | intent(in) | :: | state | |||
| character(len=1), | intent(in) | :: | side | |||
| real(kind=wp), | intent(in) | :: | q_wall(3) | |||
| real(kind=wp), | intent(out) | :: | q_ghost(3) |