Study of the Effect of Air Suction on Separation Bubble in a Flow Field around a Rectangular Cylinder

In this paper, the flow field around a two-dimensional rectangular cylinder was numerically simulated and the effects of the flow suction on the separation bubble were investigated. The purpose was to estimate the effect of suction on the dimensions of the separation bubble. The flow field was assumed incompressible, turbulent, and two-dimensional. Gambit software was used for grid generation and FLUENT for numerical simulation.The problem was analyzed in two states: with and without suction, and the effect of suction on the separation bubble was investigated. According to the results, it can be said that the suction length of the separation bubble is smaller, so that in several different cases this length is reduced by about 50%.