Aerofoil Transonic flow

Transonic · January 28, 2023, 06:11

Hi! I've been trying to simulate transonic flow (0.8 Mach) over a naca0012 but havent been getting any reliable results.

would the mesh that I've attached be able to simulate transonic flow well please? I found a picture of it, but there seems to be no tutorials on how to generate it sadly

Can someone give me some tips on this too please, very new user of Ansys Fluent

BC4BDA4E-6473-408D-8159-408F18856EB6.jpg

Thanks in advance

LoGaL · January 28, 2023, 21:00

Probably, but you should show the mesh around the airfoil, we do not care about the far field

Transonic · January 29, 2023, 10:38

Hi LoGal, sorry that’s the only image I have of the mesh.

I managed to generate the parabola geometry, but am really struggling with the actual meshing? Can you suggest where to start with meshing like that please? Should I start with splitting up the geometry using lines maybe first?

Thanks

LoGaL · January 29, 2023, 16:58

I have no clue how the mesh looks like near the airfoil. Probably it is fine. But maybe not. I don't see it.

xiaolong.li · January 29, 2023, 20:02

Quote:

Originally Posted by Transonic

Hi! I've been trying to simulate transonic flow (0.8 Mach) over a naca0012 but havent been getting any reliable results.

would the mesh that I've attached be able to simulate transonic flow well please? I found a picture of it, but there seems to be no tutorials on how to generate it sadly

Can someone give me some tips on this too please, very new user of Ansys Fluent

Attachment 93148

Thanks in advance

Hello, about this case. There are some open papers you can reference.Also, you can find the nearly same cases in youtube.

Transonic · January 30, 2023, 04:51

Hi xiaolong.li and LoGal, thank you Xiaolong for the idea on using papers, I actually managed to find this close up.

I still am unsure about how actually generate a mesh like this (both far field and close to the aerofoil), I’m not managing to get it to look the same.

This is what I think they use close to the aerofoil: Inflation

But then for the far field part, how do I generate a mesh like that please? Could you maybe suggest tutorial that covers this please as they seem to be only showing the setup on YouTube not the geometry or mesh bit

LoGaL · January 30, 2023, 06:52

ah I see. Look for ICEM airfoil tutorials. C grid or O grid.

Transonic · January 30, 2023, 11:48

Hi again, do you think it could be made in Andy’s Fluent design modeller please? I haven’t used ICEM before

LoGaL · January 30, 2023, 14:16

design modeller modifies the geometry, but is not capable of meshing. Something similar can be produced with the ansys mesher in the workbench.

But tbh it really takes 1-2 days to learn how to create meshes for simple geometrical shapes such as an airfoil, no matter the software. In my opinion you are wasting your time thinking too much while you should get into action

xiaolong.li · January 31, 2023, 07:51

Hi, you can see this video.

https://www.youtube.com/watch?v=nzvEvLCxOss

January 28, 2023, 06:11	Aerofoil Transonic flow	#1
Transonic Member Join Date: Jan 2023 Posts: 32 Rep Power: 3	Hi! I've been trying to simulate transonic flow (0.8 Mach) over a naca0012 but havent been getting any reliable results. would the mesh that I've attached be able to simulate transonic flow well please? I found a picture of it, but there seems to be no tutorials on how to generate it sadly Can someone give me some tips on this too please, very new user of Ansys Fluent BC4BDA4E-6473-408D-8159-408F18856EB6.jpg Thanks in advance

January 28, 2023, 21:00		#2
LoGaL Senior Member Lorenzo Galieti Join Date: Mar 2018 Posts: 373 Rep Power: 12	Probably, but you should show the mesh around the airfoil, we do not care about the far field Transonic likes this.

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January 29, 2023, 10:38		#3
Transonic Member Join Date: Jan 2023 Posts: 32 Rep Power: 3	Hi LoGal, sorry that’s the only image I have of the mesh. I managed to generate the parabola geometry, but am really struggling with the actual meshing? Can you suggest where to start with meshing like that please? Should I start with splitting up the geometry using lines maybe first? Thanks

January 29, 2023, 16:58		#4
LoGaL Senior Member Lorenzo Galieti Join Date: Mar 2018 Posts: 373 Rep Power: 12	I have no clue how the mesh looks like near the airfoil. Probably it is fine. But maybe not. I don't see it.

January 30, 2023, 06:52		#7
LoGaL Senior Member Lorenzo Galieti Join Date: Mar 2018 Posts: 373 Rep Power: 12	ah I see. Look for ICEM airfoil tutorials. C grid or O grid.

January 30, 2023, 11:48		#8
Transonic Member Join Date: Jan 2023 Posts: 32 Rep Power: 3	Hi again, do you think it could be made in Andy’s Fluent design modeller please? I haven’t used ICEM before

January 30, 2023, 14:16		#9
LoGaL Senior Member Lorenzo Galieti Join Date: Mar 2018 Posts: 373 Rep Power: 12	design modeller modifies the geometry, but is not capable of meshing. Something similar can be produced with the ansys mesher in the workbench. But tbh it really takes 1-2 days to learn how to create meshes for simple geometrical shapes such as an airfoil, no matter the software. In my opinion you are wasting your time thinking too much while you should get into action

January 31, 2023, 07:51		#10
xiaolong.li New Member xiaolong li Join Date: Jan 2023 Posts: 13 Rep Power: 3	Hi, you can see this video. https://www.youtube.com/watch?v=nzvEvLCxOss