%0 Journal Article %A Amir Taghavi and kourosh Parand and Hosein Fani %D 2009 %J International Journal of Physical and Mathematical Sciences %B World Academy of Science, Engineering and Technology %I Open Science Index 35, 2009 %T Lagrangian Method for Solving Unsteady Gas Equation %U https://publications.waset.org/pdf/8328 %V 35 %X In this paper we propose, a Lagrangian method to solve unsteady gas equation which is a nonlinear ordinary differential equation on semi-infnite interval. This approach is based on Modified generalized Laguerre functions. This method reduces the solution of this problem to the solution of a system of algebraic equations. We also compare this work with some other numerical results. The findings show that the present solution is highly accurate. %P 991 - 995