When a viscous fluid is confined between two long concentric cylinders as in Fig 4 17, the torque per unit length T required to turn the inner cylinder at angular velocity is a function of , cylinder radii a and b, and viscosity Find the equivalent dimensionless function What happens to the torque ...

Establish the variables and their dimensions T MLT fcnQ a b 1T L L MLT ...

When a viscous fluid is confined between two long concentric cylinders as in Fig. 4.17, the torque

Question:

When a viscous fluid is confined between two long concentric cylinders as in Fig. 4.17, the torque per unit length T′ required to turn the inner cylinder at angular velocity Ω is a function of Ω, cylinder radii a and b, and viscosity μ. Find the equivalent dimensionless function. What happens to the torque if both a and b are doubled?