Hey! The objective of my project is to study the effect of dimples on a golf ball in reducing drag and to provide a comparison between a golf ball and a normal smooth ball of similar dimensions. Since a golf ball reaches speeds of circa 100 m/s, I have defined a speed of 50 m/s (half the actual) in…

Hi @cdesai ! It really depends on how the coordinate system is defined. If you share the project you have had a look at I am happy to tell you more precisely. Enjoy your weekend (but keep SimScaling)! Jousef

Hey @cdesai ! [image] cdesai: I’m new to the SimScale platform and pursuing CFD analysis as a hobby. I got into it through my interest in fixed-wing UAVs which got me interested in aerodynamics. I’m trying a few projects to learn the SimScale environment. This is basically the first time I’m try…

Hey, Jousef! Thank you very much for the reply. I have done everything as directed and should be ready with the results soon. I’m waiting with fingers crossed for the simulation to end. However, there is one thing that has still got me confused. While setting up the velocity inlet boundary condit…

Hey @jousefm , Yes, that little hint about the coordinate system definition did the trick. I checked the little cube in the corner which signifies the xyz axes and figured why the inlet velocities are negative for certain projects. Thanks a ton, Chintan

[image] cdesai: However, I’m not getting the expected results with the simulations. According to the results, the smooth ball is the one generating less vortices at the back, effectively suffering less drag. Hey @cdesai ! Maybe it is not a problem associated with the simulation. As a golf bal…

I think I’ve already answered this in another post but: A steady-state simulation cannot capture an unsteady wake from a non-“aerodynamic” object. Therefore, velocity residuals will never reach an acceptable value (i.e 1e-4 at least). You may notice this in your residual plot. [image] Because of …

SimScale CAE Forum

Issue with Golf Ball simulation

Project Support

enelleranden February 17, 2022, 8:15pm 9

Did you ever get this to work?
I’m trying the same thing but cant make it work