Learning Forum

[practice_ping_pong]

I am interested in studying a ping pong ball's flight in the air and using Ansys 2020 R2 Fluent at the moment. How can I create the geometry model? A ping pong ball has the following characteristics:

Inner Diametre is 39.60 mm, Outer Diamtre 40.20 mm and the shell thickness 0.30mm. The weight of a ball is 2.70 g.

How do I add the air into the project? I read about treating air as an enclosure in earlier versions of Ansys CFD but I don't know how to add the air flow for my project in Ansys 2020 R2.

I would appreciate if anyone can show me step by step how to achieve the above.

Sincerely,

Xiu (practice_ping_pong)

[Marco Coderoni]

Hello,
The simplest approach would be to study the ball as fixed in the air volume, just to analyze how the air would flow around it. This would be a good starting point to get used to using Fluent. You can refer to this simulation example as reference:
You can then increase the complexity of the simulation as needed. In the fluid dynamic analysis, you would only to create an enclosure around a simple sphere with the external diameter you plan to use. The inner geometry is not needed. You can use SpaceClaim to quickly do this.
Hope this helps.

[jannifer201387]

A ping pong ball consists of:
The Inner Diameter of ping pong is 39.60 mm, the Outer Diameter is 40.20 mm, and the shell thickness is 0.30mm. The weight of a ball is 2.70 g.

[Rob]

correct, but if you were modelling the flow around one (in 6DOF) what would the density be?