Hi, I am trying to get aerodynamic coefficients on golf ball models that I have created. I will be using the drag and lift coefficients to get drag and lift forces for a school extended essay.
For each golf ball model, I have set up the simulation following the tutorial for a compressible CFD simulation of a golf ball: https://www.simscale.com/docs/tutorials/compressible-cfd-simulation-golf-ball/
I have modified the enclosure according to the dimensions of my golf ball models and added a result control for force and moment coefficients to get the drag and lift coefficients I need.
For each golf ball model, the dimensions are:
Diameter of the golf ball: 42.67mm
Diameter of the golf ball dimples: 3.0mm
Depth of the golf ball dimples: 2.0 - 3.0 mm
I have varied the dimple depth of each model by 1.0mm.
From what I have researched, there is supposed to be a noticeable difference in the lift and drag coefficients for each model, but the values I got were generally around the same and they seem to be too small. In addition to that, for the convergence plots, Ux, Uy and Uz have high fluctuations.
I am really new to CAE so I am not too sure what to do to rectify this issue. Help and advice in any way would be greatly appreciated.