3 Replies Latest reply on Mar 18, 2016 8:07 AM by Amit Katz

Water flow analysis with environment air mixture

Marco Grippa Mar 17, 2016 5:56 AM

Hi, I wonder if in Flow Simulation is possible to estimate the velocity performance of a water stream in a basin with a top opening to the free environment. I personally don't think so, because FS allows only inlet/outlet opening and, in this case with air mixture, there would be only a contact and not a proper air flowing.

Thanks a lot.

Best regards,

Marco

Re: Water flow analysis with environment air mixture

Amit Katz Mar 17, 2016 2:29 PM (in response to Marco Grippa)

Flow Simulation does not have the capability to simulate free surfaces (i.e. moving fluid-fluid boundaries.)
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- Re: Water flow analysis with environment air mixture
  
  Marco Grippa Mar 18, 2016 7:53 AM (in response to Amit Katz)
  
  Well, my problem is a bit different: there is environment air (as a free surface) and moving water down. I tried to set "Environment pressure" as a Boundary conditions but I think FS interpretates that as an outlet, isn't it?
  Are there no tricks to make it possible?
  Thanks in advance.
  Marco
  
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Re: Water flow analysis with environment air mixture

Amit Katz Mar 18, 2016 8:07 AM (in response to Marco Grippa)

You can have air and water in the same simulation, but only as separated sub-domains.
The "environment pressure" boundary condition simply means that whatever fluid touches that surface will be at the environmental pressure set in the project options. I recommend going through a few tutorials on the software to get an idea of the basic types of boundary conditions.
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