EFFECT OF OPPOSING BUOYANCY IN CONFINED FLOW OF POWER-LAW FLUIDS ACROSS A CIRCULAR CYLINDER

Abstract

Flow phenomenon across the circular cylinder has been a conventional problem in the field of fluid mechanics and draws a lot of interest in the field of research. Voluminous research work has been done, as shown by the assessment available on this area under discussion (Zdravkovich, 1997, 2003), a circular cylinder represents the simple bluff body shape and certainly it has given important understanding to the fundamental physics of the flow covering the flow and heat transfer characteristics. On the other hand, the flow across a cylinder also signifies the importance of several industrially relevant applications such as modern designs of heat exchangers including tubular, pin-type etc. Regardless of this sufficient understanding of the flow and hydrodynamics forces, is very much required to design the support structures open to the non-Newtonian fluids in polymer processing operations. (Chhabra and Richardson,1999). The flow across a cylinder is influenced by number of factors such as the shape of the cylinder like circular: semi circular; trapezoidal etc , confined or unconfined flow , turbulent or laminar flow.