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Inlet but not outlet

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Old   June 10, 2010, 04:41
Default Inlet but not outlet
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Mireia Ayop
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I'm starting with FLUENT. I have a simple model: an enclosure with an inlet and an outlet. I use compressible Xenon as fluid and I would like to find the pressure at the outlet giving some conditions at the inlet. As if I impose in Gambit that the outlet is 'pressure_outlet' FLUENT obliges me to specify a pressure there and as I work with compressible fluids I cannot use the 'outflow' boundary condition... Should I impose that my outlet is an 'interface'? Or... is there any way in FLUENT to modelize this kind of problems entering only the conditions at the inlet? I don't want to impose any condition at the outlet.

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Old   June 10, 2010, 10:56
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Anirban Jana
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Isn't the "pressure drop" the important quantity (especially if your flow is incompressible or almost so)? In that case you can have a velocity inlet and a pressure outlet, and set the pr at the pr outlet to zero (just a reference pr), and after simlulation note the pr at the vel inlet.

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