Page 235 - 48Fundamentals of Compressible Fluid Mechanics

11.5. ADVANCE TOPICS 197

This solution should used only for 1+ ; otherwise equations (??) and

(??) must be solved numerically.
The solution of equation (??) and (??) is described in “Pressure die cast-
ing: a model of vacuum pumping” Bar-Meir, G; Eckert, E R G; Goldstein, R J
Journal of Manufacturing Science and Engineering (USA). Vol. 118, no. 2, pp.
259-265. May 1996.