A film of newtonian liquid folws down the outside surface of avertical cylinder of radius R. the flow is steady, laminar and the thickness of the film is constant.
(a) derive an equation for the velocity profile within thefilm in terms of radial distance r, measured from the cylinderaxis, the film thickness, δ, and the appropriate physicalpropertiesof the liquid. State clearly all assumptions made
(b) Sketch clearly the velocity and shear stress profiles inthe liquid film.