Struggling with this question, please help with questions underlined or bracketed in yellow, help will be greatly appreciated!
From Acheson: Elementary Fluid Dynamics
Hint from the Book answer to the amount of torque needed at end of question:
Struggling with this question, please help with questions underlined or bracketed in yellow, help will be...
From Acheson: Elementary Fluid Dynamics Equation 7.3 and 6.12 (Slow Flow Equations) 7.2. A rigid sphere of radius a is immersed in an infinite expanse of viscous fluid. The sphere rotates with constant angular velocity Ω. The Reynolds number R-Ωα2/v is small, so that the slow flow equations apply (see eqns (7.3) and (6.12)). Using spherical polar coordinates (r, θ, φ) with θ-0 as the rotation axis, show that a purely rotary flow u us(r, e, s possible provided that...