Study of Drag Coefficient Using CFD Tools

Abstract

Flow over cylinder is frequently encountered in practice. The objective of this project is modelling and simulation of the flow over a cylinder by using CFD techniques in order to study the values of drag coefficient at different Reynolds number ranging from 1 to 100 at a given Length to Diameter ratio (L/D). Different length to diameter ratio (L/D) of cylinder is considered, ranging from 0.005 to 1 is taken. Study of the variation of drag coefficient at different L/D ratios of the cylinder at a constant Reynolds has been done graphically. Comparison of the values of drag coefficient at L/D equal to one with that of the sphere has been done graphically and discussed. Analysis and discussion of the flow over the cylinder at varying Reynolds number and different L/D ratios using velocity contours, pressure contours, streamlines and vorticity plots.