Stirred Tanks with Flow Rates a Function of Level

4 STIRRED TANKS WITH FLOW RATES A FUNCTION OF LEVEL 

The equations that describe this system must be developed. Thus, applying the principle of conservation of mass to the system, we have 

The flows Fi and F2 can be related to the pressure drop across each valve by applying the mechanical energy balance across each valve. Here 

Accumulation of = Mechanical - Mechanical + Generation of Mechanical Energy Energy In Energy Out Mech. Energy 

The potential energy differences are negligible and there is no mechanical work, Ws- Therefore, for the first valve we have 

---