Matching high-order first derivative of a unit-spacing nodal line: the undivided difference of the conservative-flux face values (cons_flux_1d_unit), so dg(i) reproduces the high-order central derivative AND stays bit-consistent with the face metrics built from the same operator (the property that makes freestream telescope to round-off, design spec ยง5.3).
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=wp), | intent(in) | :: | g(:) | |||
| real(kind=wp), | intent(out) | :: | dg(:) |