In this article, 2-dimensional isentropic compressible flow throughout a rectangular channel with a bump is studied numerically. The recent researches were often carried out for a circular arc bump of 4 or 10% of total height of channel. In the present study the influence of geometry of bump in the channel is investigated. Due to this aim, two kinds of bump (circular arc and rectangular) with the height of 10, 30 and 50% of total height of channel are investigated and the obtained results are compared. The inlet Mach number is 0.5 for all the CFD models. The governing equations are Euler equations and a Finite Volume method is applied to the equations in order to solve them. Some of the results are compared to the valid available data and they show reasonable agreement. The Mach number and static pressure distributions inside the channel together with secondary flow investigation are the main results of the article.
