Title: Three dimensional numerical investigation of forced convection heat transfer from offset square cylinders placed in a confined channel
Authors: P. Rajesh Kanna; M. Sivasubramanian; P. Maheandera Prabu; M. Uthayakumar
Addresses: Department of Mechanical Engineering, Velammal College of Engineering and Technology, Madurai, Tamil Nadu – 625 009, India ' Department of Mechanical Engineering, Kalasalingam University, Srivilliputhur, Tamil Nadu – 625 125, India ' Department of Mechanical Engineering, SBM College of Engineering Technology, Dindigul, Tamil Nadu, India ' Department of Mechanical Engineering, Kalasalingam University, Srivilliputhur, Tamil Nadu – 625 125, India
Abstract: Flow over two isothermal offset square cylinders in a confined channel is simulated for different Reynolds number to reveal the forced convection heat transfer from the heated square cylinders to the ambient fluid. The distance between the cylinder in normal direction as well as transverse direction are fixed as two-dimensional and the blockage ratio is fixed as 0.167. Heat transfer from the cylinders to the ambient fluid as well as conducted within solid wall through conjugate interface boundary investigated in connection with Reynolds number are reported for both steady and periodic flow. Simulation is carried out for Reynolds number varies from 10 to 1,000 for the fluid as air. The isotherm, streamline contours are reported for various Reynolds number. The stagnation zone results higher Nusselt number than remaining walls and rear wall results lowest Nusselt number. Asymmetry vortices are reported at higher Reynolds number. The downstream cylinder results higher Nusselt number than the upstream cylinder.
Keywords: three dimensional flow; offset cylinder; heat transfer; Nusselt number.
International Journal of Computer Aided Engineering and Technology, 2018 Vol.10 No.1/2, pp.141 - 156
Received: 04 Sep 2015
Accepted: 15 Mar 2016
Published online: 12 Dec 2017 *