TVD-RK3 via the shared kernel (see rk4_step_2d notes). Q2a authorized last-bit change, as ssprk22 above. This is every 2D deck's default integrator, so all 2D golden outputs move at the last bit.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| type(solver_state_2d_t), | intent(inout), | target | :: | state |