{"id":168695,"date":"2022-04-20T15:59:39","date_gmt":"2022-04-20T15:59:39","guid":{"rendered":"\/forum\/forums\/topic\/how-to-define-boundaries-when-simulating-relative-humidity\/"},"modified":"2022-04-21T10:47:26","modified_gmt":"2022-04-21T10:47:26","slug":"how-to-define-boundaries-when-simulating-relative-humidity","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-define-boundaries-when-simulating-relative-humidity\/","title":{"rendered":"How to define boundaries when simulating relative humidity?"},"content":{"rendered":"
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Hello, <\/p>\n

I am using the species model and defined 50% relative humidity (Mass fraction of h2o is 0.00879) in my model. Temperature is constant at the inlet, outlet, and walls. I defined the inlet as a pressure outlet and also defined the outlet as a velocity inlet. The result that I am getting shows relative humidity of 1200% and even more in finer meshes. <\/p>\n

Now my questions are :<\/p>\n

1- Am I doing something wrong? <\/p>\n

2- both inlet and outlet are open, so air is coming into my geometry from the inlet (because of velocity inlet) and exiting through the outlet with a relative humidity of 50%. However, I think since I am defining a Mass fraction of h2o of 0.00879 at the outlet, I am forcing the simulation to reach this level of humidity which is not what I am looking for. <\/p>\n

<\/p>\n<\/p>\n

3- Is there any way to define the RH as 50% for the inlet velocity and let the system calculate it to the outlet? <\/p>\n

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