BC for Subsonic external flow

9mile · November 2, 2009, 09:03

Hello Users~!

I want to solve the external flow around 2D airfoil in subsonic area.
In this case, the segrated solver for the problem was chosen and incompressible ideal-gas was used as a material.
For boundary condition, I'm supposed to apply the pressure-farfield to the far-field. But Flent gave the warning signal that said the pressure-farfield cannot use with incompressible-farfield.
Then how can i handle the far-field boundary on C region of C grid type in the subsonic flow.
Share your knowledge.

Thanks.

greeneye · November 3, 2009, 06:35

hello
it is better to use coupled solver of fluent because it is better for pressure far field boundary condition.

9mile · November 3, 2009, 07:43

Dear Greeneye
As i mentioned before, the flow problem is of subsonic regime.
Actually the flow velocity is 30m/s.
I understood that in a subsonic flow i've to use the segrated solver based on pressure.
Does it matter that i use the coupled solver for the subsonic flow?

November 2, 2009, 09:03	BC for Subsonic external flow	#1
9mile New Member Neo Join Date: Mar 2009 Posts: 18 Rep Power: 17	Hello Users~! I want to solve the external flow around 2D airfoil in subsonic area. In this case, the segrated solver for the problem was chosen and incompressible ideal-gas was used as a material. For boundary condition, I'm supposed to apply the pressure-farfield to the far-field. But Flent gave the warning signal that said the pressure-farfield cannot use with incompressible-farfield. Then how can i handle the far-field boundary on C region of C grid type in the subsonic flow. Share your knowledge. Thanks.

November 3, 2009, 06:35	hello	#2
greeneye New Member reza Join Date: Nov 2009 Posts: 5 Rep Power: 16	hello it is better to use coupled solver of fluent because it is better for pressure far field boundary condition.

November 3, 2009, 07:43	Thanks for your reply	#3
9mile New Member Neo Join Date: Mar 2009 Posts: 18 Rep Power: 17	Dear Greeneye As i mentioned before, the flow problem is of subsonic regime. Actually the flow velocity is 30m/s. I understood that in a subsonic flow i've to use the segrated solver based on pressure. Does it matter that i use the coupled solver for the subsonic flow?

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