Book Chapter of the book Focus on Porous Media Research Analytical solution of a Walters’ liquid B flow over a linear stretching sheet in a porous medium U. S. Mahabaleswar 1 , Suvash C. Saha 2* 1 Department of Mathematics, Government First Grade College for Women Hassan 573 201 , Karnataka, India 2 School of Chemistry, Physics & Mechanical Engineering, Queensland University of Technology 2 George St., GPO Box 2434, Brisbane QLD 4001, Australia *Corresponding author: suvash.saha@qut.edu.au Abstract This chapter represents the analytical solution of two-dimensional linear stretching sheet problem involving a non-Newtonian liquid and suction by (a) invoking the boundary layer approximation and (b) using this result to solve the stretching sheet problem without using boundary layer approximation. The basic boundary layer equations for momentum, which are non-linear partial differential equations, are converted into non-linear ordinary differential equations by means of similarity transformation. The results reveal a new analytical procedure for solving the boundary layer equations arising in a linear stretching sheet problem involving a non-Newtonian liquid (Walters’ liquid B). The present study throws light on the analytical solution of a class of boundary layer equations arising in the stretching sheet problem. Keywords: Walters’ liquid B; stretching sheet, nonlinear differential equations; porous media 1. Introduction The present study of a laminar and steady flow of a viscoelastic fluid (Walters’ Liquid B) driven by a continuous solid surface seems to be initiated by Sakiadis (1961a,b) under the assumption of boundary layer theory. The flow situations occur in a great number of industrial applications such as materials manufacture by extrusion processes and heat-treated materials