Viscosity

PritamDamania · 2004 June 15th, 06:55

Could anyone explian to me the viscous forces acting on a disc rotating with angular velocity w and radius R in a viscous medium of viscosity n.The disc is in a closed vessel with the distance between the upper surface of the vessel and the disc being h and the disc is placed in the middle of the vessel.

Fidelis Adhika · 2004 June 15th, 07:02

Well, viscousity depends on velocity right? As the disc is in rotating motion, why don\'t we find the total torque that works on the disc because the total force should be zero right? :) Symmetrical reason.

PritamDamania · 2004 June 16th, 00:47

Well actually i should not have chnged the question a bit. As you are familiar with Irodov this is Q 1.331 and I need a hint atleast how to start for it. Do I need some extra formulae other than the ones given inthe beginning of the chapter as i am familiar with those.

And BTW could you suggest from where should i read up viscosity as the book from which i read it only contained.

F = -nAdv/dz, this formula,poiseuilles law, stokes law and reynolds no., the last three which i think cant be applied in the problem.

PritamDamania · 2004 June 16th, 06:23

In the Irodov book the question is power developed by the viscous forces