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I want to compute reflected pressures in Mach reflection region. In Mach reflection, let's just think about the reflected, incident and merged pressures (of Mach stem). You know, the merged pressure is created by coalescing the incident and reflected pressures. Assuming that all the pressures are straight lines, can I simply calculate the merged pressure given that the incident and reflected pressures are known at the moment of transition from regular to Mach reflection?

Or is the merged pressure just the sum of the scalar values of two pressures independent of the angle of incidence and reflection? If so, the reflected pressure from the merged pressure will be always larger than the reflected pressure before Mach reflection. But, this might be not true because I have to consider dynamics pressures as well as static pressures. I have difficulties of handling the two different kinds of pressures in the calculation of the merged pressure and the reflected pressure from it after Mach reflection.

Thank you,

Lasfoe