Numerical Investigation of Transient Flow Past a Cylinder using SST k-�‰ Formulation

Unsteady flow around bluff bodies is an area of great research for scientist for several years. Flows around buildings, chimneys are examples where the fluid is in motion. Atmospheric dispersion of pollutants around bluff bodies has intensified the need to understand wake behavior. The vortex shedding frequency depends on different aspects of the flow field such as the end conditions, blockage ratio of the flow passage. In the present study, the fluid flow and heat transfer from a two-dimensional circular cylinder is considered in the unsteady flow regime. In particular, the effect of Reynolds number on drag and lift coefficients, Strouhal number circular cylinder are investigated for Reynolds number range: Re = 50-100 for the unconfined unsteady cross-flow. The results are presented in the form of streamlines, pressure distribution, monitored velocity, Lift and drag coefficient and Strouhal number. The present work has benefits for better understanding the flow past obstacles and the associated flow-induced vibration.