Channels, Fall 2020

Channels • 2 020 • Volume 5 • Number 1 Page 6 Fig. 5 Groove depth study of elliptical Model A cylinders TABLE III E XPERIMENTAL G ROOVE N UMBER S TUDY Number of Grooves Coefficient of Drag 0 0.4879 19 0.3308 21 0.3136 23 0.3179 25 0.3729 Fig. 6 Groove number study of elliptical Model B cylinders Numerical Simulation A. Numerical Procedure and Approach The numerical research included studies using two and three dimensional CFD in ANSYS FLUENT. Two dimensional simulations were used to provide quick simulations to reveal essential features of the flow fields. Three dimensional simulations were far more expensive in terms of computation time and were used to more accurately simulate the tests in the wind tunnel, as they accounted for the flow over the ends of a non-infinite cylinder. Both the two- and three-dimensional studies were performed using FLUENT and the meshes were generated in ICEM. To decrease computation time on simulations, calculations were performed at the Ohio Supercomputer Center [8]. The basic setup used consisted of transient turbulent models using a time