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180 Degree Bend Duct Flow in FLUENT

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Old   July 25, 2012, 08:49
Exclamation 180 Degree Bend Duct Flow in FLUENT
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John
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I'm simulating a 2D U-bend duct using FLUENT.

Properties from experimental case are;

U= 31.1m/s.
Mach= 0.1.
Operating Pressure= 12atm.
Re=10^6.

What are the boundary conditions at inlet and outlet?
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Old   July 25, 2012, 09:10
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If you don't know where and how the values were measured, I would try a velocity inlet with a bulk velocity of U and a pressure outlet at the operating pressure.
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Old   July 25, 2012, 09:11
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Quote:
Originally Posted by flotus1 View Post
If you don't know where and how the values were measured, I would try a velocity inlet with a bulk velocity of U and a pressure outlet at the operating pressure.

So you mean at inlet I should have 31.1 with 0 pressure, and at outlet 12atm operating pressure?
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Old   July 25, 2012, 10:23
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As far as I know you do not need to specify a value for pressure at a velocity inlet.
The pressure at the inlet will be a result of your simulation.
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