Title: Heat transfer enhancement of laminar forced convection in a channel by von-Karman vortex generator
Authors: A.A. Mohamad; A. Tarokh; H. Alansary
Addresses: Department of Mechanical and Manufacturing Engineering, CEERE, Schulich School of Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada ' Department of Mechanical and Manufacturing Engineering, CEERE, Schulich School of Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada ' Department of Mechanical Engineering, King Saud University, Riyadh, Saudi Arabia
Abstract: The work deals with a method of enhancing laminar, forced convection in channels. It is well-known that the inadequate flow mixing process in laminar flow is the limiting factor for heat transfer compared with the turbulent flow. In this work, vortex shedding (von-Karman vortex) technique is used to enhance the rate of heat transfer in a channel fitted with off-centre obstacles. Vortex formations at the downstream of the obstacles enhance the fluid mixing process; consequently, enhancing the rate of heat transfer. The distance between obstacles is selected based on fact that at certain the downstream distance of the obstacle, the strength of the vortex decays. Lattice Boltzmann method is used to solve the governing equations.
Keywords: heat transfer enhancement; laminar flow; von Karman vortex; forced convection; channels; vortex shedding; off-centre obstacles; fluid mixing; lattice Boltzmann method.
Progress in Computational Fluid Dynamics, An International Journal, 2016 Vol.16 No.5, pp.334 - 338
Received: 08 May 2021
Accepted: 12 May 2021
Published online: 02 Sep 2016 *