.FreeFluids.Valves.SafetyValveFlash

It implements the calculation methodology described at API 520 Annex C section C.2.1, based on isentropic flow. In order to get the flow, an array of 25 pressures, between inlet and outlet pressures, are tested, and the higher flow is taken. Instead of implementing the integration of $\frac{dP}{\rho }$ to obtain the velocity, the relationship $\frac{d(v^{2)}}{2}=-dH$ has been used.