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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Balance de masa › Reply To: Balance de masa

August 1, 2024 at 6:43 am
NickFL
Subscriber

Hola Manuel,

No puedo escribir en español, espero que el inglés esta bien. 

I assume that the lower tube is defined as the flow outlet? It appears you have flow that is flowing back into the domain that has a very cold temperature -273C or 0K! That is because of the backflow conditions you have specified at this boundary condition. There are two things to consider, one is to change that to something more appropriate like the 50C that the rest of the outlet is. A better solution, the one I would chose, is to extend the outlet further “down” so that there is no backflow. This approach might also help with your mass imbalance problem in that, with backflow it is allowing water back into the domain. Look at the velocity vectors across the outlet and see if they make physical sense.

If that is not clear, please let me know and I will try and explain it better.