Numerical study of fluid flow and heat transfer in a backward facing step with a rotating cylinder

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Authors :

A. Anguraj1* and J. Palraj2

Author Address :

1Department of Mathematics, PSG College of Arts and Science, Tamil Nadu, India.
2Department of Mathematics, PSG College of Technology, Tamil Nadu, India.

*Corresponding author.

Abstract :

The present study analyzes the laminar flow and heat transfer over a backward-facing step with an adiabatic rotating cylinder in a channel. The governing Navier-Stokes and energy equations are solved using finite element method. The effect of Reynolds number, cylinder rotation angle and various cross-stream positions of the cylinder on the fluid flow and heat transfer characteristics of the backward-facing step flow have been studied numerically. The working fluid is assigned a Prandtl number of 0.71 throughout this investigation. The flow and thermal fields have been explained by streamline and isotherm profiles respectively. It is observed that the flow field and heat transfer rate are influenced by the variations of these parameters. Furthermore, the length and size of the wake zones can be controlled with cylinder rotation angles.

Keywords :

Navier-Stokes equations; Rotating obstacle; Backward facing step; finite element method; Recirculation length; Heat transfer.



Article Info :

Received : October 24, 2017; Accepted : February 09, 2018.



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