An incompressible Newtonian fluid is contained between two long concentric cylinders of radii ÀR (^< 1) and R, as shown in the figure. The inner cylinder rotates with an angular velocity . Compute the velocity distribution between the cylinders. Also, compute the torque required to hold the outer cylinder stationary. End effects caused by the finite length of the cylinders can be neglected. XR ↑ Axial section. XR Cross-section

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