Determining Velocity Distribution of Water Around Cylindrical Wood

[JohanL]

The water in a river is flowing at constant velocity. Beneath the surface and lying across the river there is a cylindrical wood. If you can assume that the wood is infinitely long how do you determine the velocity distribution of the water around the wood?

any ideas?

 

[arildno]

2-D potential flow about the circular cross-section should do it.

 

[HallsofIvy]

If you are assuming non-zero viscosity then that is a very difficult problem.