Learning Forum

[kareem_eldeaouki]

Iam working on a CFD project of 3D rocket model so i want to fing different aerodynamic coeffecients at different angle of attack or rolling angle so is there a way to enter this angles as a parameter to fluent so ansys can perform the simulation of different angles and find coeffecients each time .

Currantly iam entering the velocity as component and play with trigonometry and enter each component of the velocity but this is exhausting as i need to repeat it for every angle of attack ,

Can any one help

[Nikhil N]

Hello,

To change the angle of attack, there are two possible ways:
1: Perform modifications at the CAD/mesh level, which I believe would be more exhausting.
2: As you mentioned, use trigonometry to define the velocity components for different angles. This looks to be the simplest way. Moreover, to simplify, you can follow these two methods:
Method 1: Use expressions to define velocity components in terms of sin and cos. Just change the angle values in the expression for different iterations,
Method 2: Find out velocity components for all the angle of attacks first. Then use these values to perform parametric analysis either at the workbench level or using the Fluent (by using the standalone parametric capability of Fluent). For detailed information on how to perform parametric study in Fluent, please refer to this link:Chapter 31: Performing Parametric Studies (ansys.com)
If you face any issue while accessing the above documentation, refer to this forum discussion:Using Help with links ÔÇö Ansys Learning Forum

Nikhil

[Dániel Pollák]

Hello 

I cant access this link because I don't have a customer number. Could you help me out?