A fluid with viscosity fills space between two long co -axial cylinders o radii R1 and R2 , with R1 < R2. The inner cylinder is stationary while the outer is rotated with angular velocity 2.The fluid flow is laminar.Taking into account that the friction friction force acting on a unit area of a cylindrical surface of radius r is defined by the formula =( /r ).Find angular velocity of the rotating fluid as a function of radius r.
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fills space between two long co -axial cylinders o radii R1 and R2 , with R1 < R2. The inner cylinder is stationary while the outer is rotated with angular velocity 
2.The fluid flow is laminar.Taking into account that the friction friction force acting on a unit area of a cylindrical surface of radius r is defined by the formula 
=( 
