van Leer flux vector splitting.
For subsonic flow |M| < 1 (M = u/c): ṁ± = ±ρc (M±1)² / 4 p± = p (1±M)² (2∓M) / 4 F± = ( ṁ±, ṁ± u + p±, ṁ± H ) For |M| ≥ 1 the supersonic limit applies: F+ = F (M>1), F- = 0 (M>1). See van Leer (1982), ICASE Report 82-30.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=wp), | intent(in) | :: | q(:) | |||
| real(kind=wp), | intent(out) | :: | flux(:) | |||
| integer, | intent(in) | :: | sign |
+1 for F^+, -1 for F^- |
||
| real(kind=wp), | intent(in) | :: | gam |
Ratio of specific heats |