An isentropic process is one for which there is no heat transfer withthe surroundings, and no change in entropy
(Forall (?Self ?Time)
(=> (Active ?Time Steady-Flow-Isentropic-Process ?Self)
(Forall (?Cv)
(=> (Process-Cv ?Self ?Cv)
(= (Lambda (?T)
(If (= ?T ?Time)
(Value-At (D-Entropy-Rate ?Cv)
?T)))
0)))))
(Forall (?Self ?Time)
(<=> (Active ?Time Steady-Flow-Isentropic-Process ?Self)
(And (Steady-Flow-Isentropic-Process ?Self)
(Active ?Time Steady-Flow-Adiabatic-Process ?Self))))