Application of He s Variational Iteration Method for solving the Equation Governing the Unsteady Flow of a Polytropic Gas

In this paper, he's variational iteration method (vim) isused to obtain the exact solution of the equation governing the unsteadyflow of a polytropic gas. this method is based on lagrangemultiplier for identification of optimal value of parameter in a functional.using this method creates a sequence which tends to the exact solutionof problem. the method is capable of reducing the size of calculationand easily overcomes the difficulty of the adomian polynomials. theresults reveal that he's variational iteration method is very effective forthese types of equations.