Calculating Terminal Velocity in Turbulent Flow for a Spherical Object

[zoki85]

Hi :

See https://www.physicsforums.com/showthread.php?p=1253898&posted=1#post1253898

Please,make comment.
How would you calculate the terminal velocity ,in the turbulent flow,for a spherical rigid object?

 

[zoki85]

Anybody knows anything here on this subject?