A liquid flows between two coaxial tubes of radius kR (the inside) and R (the Exterior). The inner cylinder rises in such a way that it exerts a force constant Fz equal a – Φ (we are considering the direction of the z axis towards down). There is no appreciable pressure difference that generates or consume amount of movement. a. Determine the shear stress profile

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A liquid flows between two coaxial tubes of radius kR (the inside) and R (the
Exterior). The inner cylinder rises in such a way that it exerts a force
constant Fz equal a – Φ (we are considering the direction of the z axis towards
down). There is no appreciable pressure difference that generates or
consume amount of movement.
a. Determine the shear stress profile T rz
b. Determine the velocity profile vz

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