FLOW OF A POWER-LAW FLUID FILM ON AN UNSTEADY STRETCHING SURFACE

Flow of a thin liquid film of a power-law fluid caused by the unsteady stretching of a surface is investigated by using a similarity transfo rmation. This transformation reduces the unsteady boundary-layer equat ions to a non-linear ordinary differential equation governed by a nond imensional unsteadiness parameter S. The effect of S on the film thick ness is explored numerically for different values of the power-law ind ex n. A physical explanation for the findings is also provided.