Styrofoam object- rise or sink?

[alibaba2]

i have a 30 ft pipe - 10" diameter. there is a constant water flow at the top, keeping the water level constant ( the pipe is always full to the top). at the bottom the water just flows out of the basin and away. the pipe is is just 1" underwater in the pool underneath.
the yellow object is a styrofoam ball - diameter 9" so it will easily fit into the pipe.
will the ball rise up due to buoyancy and density differencial, or will the pressure from the water column above supress these forces and keep it at the bottom.
if the ball does rise, will its speed be slowed by the downward flow of water around it?
what will its estimate spped be, compared to the clasiccla setup where an object is released in a static water column, closed at the bottom .

 

[Doc Al]

You already have a thread on this topic: https://www.physicsforums.com/showthread.php?t=278911

 

[charng]

Based on the information provided, it is likely that the styrofoam ball will rise due to the difference in density between the ball and the water. The buoyancy force acting on the ball will be greater than the downward force of the water column above it. However, the speed at which the ball rises will be slowed by the downward flow of water around it. This is because the water flow will create drag force on the ball, which will counteract the buoyancy force.

The estimated speed of the ball will depend on various factors such as the density and viscosity of the water, the size and shape of the ball, and the speed of the water flow. It is difficult to provide an exact estimate without knowing these specific values. Additionally, if the pipe has a rough surface, it may further slow down the ball's speed due to frictional forces.

In a classic setup with a closed water column, the object would experience a similar buoyancy force but without the downward flow of water. Therefore, it is likely that the styrofoam ball would rise faster in the classic setup compared to the setup described in the question. However, the exact speed and behavior would still depend on the specific conditions and variables involved.