Isentropic nozzle flow
= Isentropic nozzle flow
Smooth adiabatic <nozzle> flow without <entropy> production. In a steady quasi-one-dimensional ideal-gas model, $\rho uA$ and $u^2/2+c_pT$ are constant along the passage. A converging-diverging passage can connect subsonic and supersonic branches through a sonic throat when reservoir and back-pressure conditions select that branch.