Fluids in Equilibrium

1. Jun 9, 2010

xnd996

Suppose I have a fluid of uniform density confined to a roating cylinder of radius $$r$$ turning at an angular speed of $$\Omega$$.

Now I am considering the fluid in the rotating frame and I know that the fluid is in equilibrium. What does this imply?

If the fluid is in equilibrium are there any internal motions? Is the velocity 0? Why?

2. Jun 9, 2010