CFD Analysis of Flow over a Trapezoidal Bluff Body with an Attached Splitter Plate

Abstract

This thesis focuses on the simulation of flow round trapezoidal bluff body with and without splitter plate by CFD (computational fluid dynamics). Bluff body is structure whose cross section is perpendicular to the fluid flow and at the rear end of the body fluid split into two halves and forms von karman vortex at rear end. Examples of bluff bodies include circular cylinder, square cylinders etc. But still flow through the trapezoidal cross section has great possibility to minimise the wake region behind the body. This work attempts to present the study of fluid behaviour of the trapezoidal bluff body using CFD. In this work CFD-fluent was performed on trapezoidal bluff body with splitter plate and without splitter plate using ANSYS 18. The first analysis is performed on the trapezoidal bluff body without splitter plate. Drag coefficient and velocity profiles have been find out with different Reynolds number. Next, same procedure is followed with splitter plate configuration. The results show that using splitter plate drag has been reduced.