simulation for various velocities and angle of attack

crusen mind · April 9, 2016, 16:51

Hello all
i am facing a situation where i want to simulate my model for various angle of attack at different velocities. I am finding it difficult to setup model for various condition is there is any short way to do it.

ghorrocks · April 10, 2016, 05:58

Vary the angle of flow at the inlet to change AOA rather than doing remeshing.

Alternately: ANSYS workbench is parameterised, so it is easy to parameterise the AOA sweep - even if you have to do remeshing.

crusen mind · April 10, 2016, 08:05

Thanks glenn
i am new to ansys. i saw a thread "multiple runs for various AOA" but they are importing geometry and meshing it in ansys workbench. problem is i have already meshed my file in ansa. is there any tutorial for what u suggest.

ghorrocks · April 10, 2016, 18:27

If you already have your mesh files then change the flow direction at the inlet.

crusen mind · April 11, 2016, 00:58

Thanks Glenn
I want to simulate my wing for various AOA and Various Velocities. so if i set zero AOA for my wing i have to run it for 10 different velocities. so for every
angle of attack i have to do 10 simulation so for 10 AOA i have to run 100 simulation. is there any easy method for this?

ghorrocks · April 11, 2016, 01:02

If your 10 different velocities at zero AOA shows that the change against Re number is small, then I would not bother about modelling the different velocities at the other AOA.

Unless you are specifically looking for differences with Re number - then you have to do the whole lot.

Don't forget that you can use parameters in workbench to do this, or a shell script/batch file. Either way, you don't need to manually start 100 runs.

crusen mind · April 11, 2016, 02:16

my flow is subsonic and mach no is only 0.123. I thinks its very low. I am new to CFX so do u have any tutorial for what u said about parameters in work bench or shell script. one thing is i already meshed my file using workbench.
thanks a lot for help glenn.

ghorrocks · April 11, 2016, 02:17

Have a look at the parametric modelling tutorials for workbench on using parameters (not the CFX tutorials).

April 9, 2016, 16:51	simulation for various velocities and angle of attack	#1
crusen mind Member alex Join Date: Feb 2016 Location: chennai Posts: 48 Rep Power: 10	Hello all i am facing a situation where i want to simulate my model for various angle of attack at different velocities. I am finding it difficult to setup model for various condition is there is any short way to do it. mortazavi likes this.

April 10, 2016, 08:05	parametric design	#3
crusen mind Member alex Join Date: Feb 2016 Location: chennai Posts: 48 Rep Power: 10	Thanks glenn i am new to ansys. i saw a thread "multiple runs for various AOA" but they are importing geometry and meshing it in ansys workbench. problem is i have already meshed my file in ansa. is there any tutorial for what u suggest.

April 11, 2016, 00:58	various AOA and Velocity	#5
crusen mind Member alex Join Date: Feb 2016 Location: chennai Posts: 48 Rep Power: 10	Thanks Glenn I want to simulate my wing for various AOA and Various Velocities. so if i set zero AOA for my wing i have to run it for 10 different velocities. so for every angle of attack i have to do 10 simulation so for 10 AOA i have to run 100 simulation. is there any easy method for this?

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April 10, 2016, 05:58		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Vary the angle of flow at the inlet to change AOA rather than doing remeshing. Alternately: ANSYS workbench is parameterised, so it is easy to parameterise the AOA sweep - even if you have to do remeshing.

April 10, 2016, 18:27		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	If you already have your mesh files then change the flow direction at the inlet.

April 11, 2016, 01:02		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	If your 10 different velocities at zero AOA shows that the change against Re number is small, then I would not bother about modelling the different velocities at the other AOA. Unless you are specifically looking for differences with Re number - then you have to do the whole lot. Don't forget that you can use parameters in workbench to do this, or a shell script/batch file. Either way, you don't need to manually start 100 runs.

April 11, 2016, 02:16		#7
crusen mind Member alex Join Date: Feb 2016 Location: chennai Posts: 48 Rep Power: 10	my flow is subsonic and mach no is only 0.123. I thinks its very low. I am new to CFX so do u have any tutorial for what u said about parameters in work bench or shell script. one thing is i already meshed my file using workbench. thanks a lot for help glenn.

April 11, 2016, 02:17		#8
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Have a look at the parametric modelling tutorials for workbench on using parameters (not the CFX tutorials).