TY - JOUR
TI - Mixed convection heat transfer past in-line square cylinders in a vertical duct
AU - Chatterjee Dipankar
AU - Raja MD
JN - Thermal Science
PY - 2013
VL - 17
IS - 2
SP - 567
EP - 580
PT - Article
AB - The mixed convection heat transfer around five in-line isothermal square  cylinders periodically arranged within a vertical duct is numerically  investigated in this paper. Spacing between two cylinders (S) is fixed at one  width of the cylinder dimension (d) and the flow confinement of various  degrees are studied for the blockage ratios of B = 0%, 10%, 25% and 50%. The  buoyancy aided/opposed convection is examined for the Richardson number (Ri)  ranges from -1 to +1 with a fixed Prandtl number Pr = 0.7 and Reynolds number  Re = 100. The transient numerical simulation for this two-dimensional,  incompressible, laminar flow and heat transfer problem is carried out by a  finite volume based commercial CFD package FLUENT TM. The representative  streamlines and isotherm patterns are presented to interpret the flow and  thermal transport visualization. Additionally, the time and surface average  skin friction coefficient (Cf), drag (CD) and lift (CL) coefficients as well  as the time and surface average Nusselt number (Nu) for representative  cylinders are determined to elucidate the effects of Re and Ri on the flow  and heat transfer phenomena.