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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Volume Fraction too Low. How to Improve? › Reply To: Volume Fraction too Low. How to Improve?

July 28, 2024 at 11:59 am
abdullahhassan
Subscriber

In addition to the above case, can you clarify me about latent heat? Supposing the value of latent heat at 300 K is 1.972e7, with LIQUID in the From phase and VAPOR in the To phase, the SSE should be positive to avoid "error: latent heat should not be negative". Do this thing have some link to condensation?

Am I doing an evaporation instead of condensation?

 

Secondly, I just observed that the pressure itself is nearly constant which means at the outlet, the pressure is not decreasing which I think maybe also a reason for condensation not happening or very slow condensation. 

the inlet pressure was 1061700pa @ 300K and outlet pressure I put was 998150Pa @ 297K. after simulation. below is the pressure now