armcms - Compute given characteristic mach number, M*

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3.2.3 armcms - Compute given characteristic mach number, $M *$

DOUBLE PRECISION FUNCTION AR02AB(G,MSTAR,IERR)
  DOUBLE PRECISION G, MSTAR
  INTEGER IERR

Compute given the characteristic mach number, $M *$ . Note that if $√︁ ---------- M *= (γ+ 1)(γ-1)$ the function will return $M = ∞ = INFINITY$ .

Performance
Fixed

Parameters

G - REAL: ENTRY: Specific heat constant $γ$ .
MSTAR - REAL: ENTRY: Characteristic mach number $0< M* ≤√︁(-γ+1)(γ-1)$ .
IERR - INTEGER: EXIT: (optional) Return status code.

Status Codes

-1: Specific heat ratio $γ≤ 1$ .
-3: Given $M *$ out of specified range.

Return Value
Normal mach number $M$ or NAN on error.

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