Approximate Strongly Nonlinear Equation By Spline Method

In this paper, we employ an approximate analytical method, namely the spline method(SM) to investigate a thin film of a third grade fluid down an inclined plane and provided accurate solution unlike other erroneous results available in the literature. The variation of the velocity field for different parameters is compared with the numerical values obtained by the Runge – Kutta Fehlberg method and with the homotopy perturbation method (HPM). Moreover, we found that for all values of parameters (SM) agrees well with the numerical disparate HPM.