Transonic/supersonic simulation outlets

Jose Daniel · December 22, 2015, 09:39

Hello all,

I am trying to simulate a transonic flow around an airfoil for my thesis and I'm struggling with the outlets of the domain.

There are two options that I think they are reasonable for the outlet:

- Outlet: In this option, the program runs well but it starts to create walls in the outlet due to fluid entering into the domain. CFX suggests to change to Opening option but...

- Opening: the only option to set is that the fluid is subsonic, which is not true in both transonic and supersonic cases...

What do you suggest?

ghorrocks · December 22, 2015, 17:59

Move your outlet boundary further downstream so it is not in the recirculation zone.

Jose Daniel · December 30, 2015, 10:56

Thank you, it works!

December 22, 2015, 09:39	Transonic/supersonic simulation outlets	#1
Jose Daniel New Member Jose Daniel Join Date: Dec 2015 Posts: 6 Rep Power: 10	Hello all, I am trying to simulate a transonic flow around an airfoil for my thesis and I'm struggling with the outlets of the domain. There are two options that I think they are reasonable for the outlet: - Outlet: In this option, the program runs well but it starts to create walls in the outlet due to fluid entering into the domain. CFX suggests to change to Opening option but... - Opening: the only option to set is that the fluid is subsonic, which is not true in both transonic and supersonic cases... What do you suggest?

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December 22, 2015, 17:59		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Move your outlet boundary further downstream so it is not in the recirculation zone.

December 30, 2015, 10:56		#3
Jose Daniel New Member Jose Daniel Join Date: Dec 2015 Posts: 6 Rep Power: 10	Thank you, it works!