Assigning Direction to flow

akki_malik · November 16, 2018, 08:46

Hi, I was doing simulation of flow over a missile, But the problem the direction of flow.

The missile was oriented in positive x direction, and the flow by default in SU2 is also oriented in positive x direction. I could not find any option, which can help me to change the flow direction to negative x. Although, there is one option FREE_STREAM_VELOCITY which takes 3 arguments, I tried giving -1 in first argument, but it was not helpful.

If anyone has experience in dealing with this kind of situation, Please help.

aero_amit · November 17, 2018, 13:16

Angle of attack 180 deg may do the job but be careful with alpha and beta definitions (just check it out).

akki_malik · November 17, 2018, 13:34

Thanks for reply.
Already tried AoA as 180, Not helpful.

aero_amit · November 17, 2018, 13:46

What happened?

akki_malik · November 17, 2018, 13:47

The direction of flow did not change. There has to be some other way.

whizkid · November 20, 2018, 01:28

I have not experienced such a problem but maybe rotating the mesh using SU2_MSH may work.

akki_malik · November 20, 2018, 01:48

Thanks, Rotating the mesh worked.

But, I just want to know for future, if there is some option to assign velocity direction.

aero_amit · November 20, 2018, 01:57

Angle of attack and sides slip angle option decides the flow velocity direction.......

themrdjj · December 12, 2019, 07:56

How can I rotate the mesh using SU2_MSH?

November 16, 2018, 08:46	Assigning Direction to flow	#1
akki_malik New Member Akshay Malik Join Date: Jul 2016 Posts: 13 Rep Power: 10	Hi, I was doing simulation of flow over a missile, But the problem the direction of flow. The missile was oriented in positive x direction, and the flow by default in SU2 is also oriented in positive x direction. I could not find any option, which can help me to change the flow direction to negative x. Although, there is one option FREE_STREAM_VELOCITY which takes 3 arguments, I tried giving -1 in first argument, but it was not helpful. If anyone has experience in dealing with this kind of situation, Please help.

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November 17, 2018, 13:16		#2
aero_amit Member Amit Join Date: May 2013 Posts: 85 Rep Power: 13	Angle of attack 180 deg may do the job but be careful with alpha and beta definitions (just check it out).

November 17, 2018, 13:34		#3
akki_malik New Member Akshay Malik Join Date: Jul 2016 Posts: 13 Rep Power: 10	Thanks for reply. Already tried AoA as 180, Not helpful.

November 17, 2018, 13:46		#4
aero_amit Member Amit Join Date: May 2013 Posts: 85 Rep Power: 13	What happened?

November 17, 2018, 13:47		#5
akki_malik New Member Akshay Malik Join Date: Jul 2016 Posts: 13 Rep Power: 10	The direction of flow did not change. There has to be some other way.

November 20, 2018, 01:28		#6
whizkid Member C Join Date: Apr 2013 Posts: 37 Rep Power: 13	I have not experienced such a problem but maybe rotating the mesh using SU2_MSH may work.

November 20, 2018, 01:48		#7
akki_malik New Member Akshay Malik Join Date: Jul 2016 Posts: 13 Rep Power: 10	Thanks, Rotating the mesh worked. But, I just want to know for future, if there is some option to assign velocity direction.

November 20, 2018, 01:57		#8
aero_amit Member Amit Join Date: May 2013 Posts: 85 Rep Power: 13	Angle of attack and sides slip angle option decides the flow velocity direction.......

December 12, 2019, 07:56		#9
themrdjj New Member Daniel Join Date: Nov 2018 Posts: 24 Rep Power: 8	How can I rotate the mesh using SU2_MSH?