the isobaric process a single fluid stream undergoes within a heat exchanger
(Forall (?Self ?Time) (<=> (Active ?Time Steady-Flow-Isobaric-Heat-Transfer ?Self) (And (Steady-Flow-Isobaric-Heat-Transfer ?Self) (Active ?Time Steady-Flow-Heat-Transfer ?Self) (Active ?Time Steady-Flow-Isobaric-Process ?Self))))