TY - JOUR
TI - Numerical simulation of convective heat transfer coefficient in channel with corrugated walls
AU - Kewou Serge
AU - Edoun Marcel
AU - Tawetsing Olivier Mba
AU - Kuitche Alexis
JN - Thermal Science
PY - 2018
VL - 22
IS - 1
SP - 87
EP - 100
PT - Article
AB - The present work is a contribution to study of convective heat transfer  coefficient inside a rectangular channel with corrugated walls. Triangular,  square and rectangular shaped configurations were studied for a range of  geometric parameters during simulation. The Navier-Stokes equations were  numerically solved using the finite volume method through the Easy CFD_G  package code in its V.4.1.0 version. With prescribed temperatures and  velocities, the model predicts the behavior of the airflow inside the device.  The temperature and velocity distributions are first predicted. From these  distributions, the convective heat transfer coefficients along the surface of  the objects placed inside the system are determined. Also, from the pressure  distribution, the pressure drops along the channel are predicted. The results  show that the triangular corrugated-shaped configuration with h = 5 [cm] and  α = β = 60° enable to obtain the best value of convective heat transfer  coefficient on the surface of the objects which is 2.70 [Wm-2°C-1] resulting  in a pressure drop of 0.11 [Pa], while for parallel-plate channel  configuration this same coefficient is 1.12 [Wm-2°C-1]. The energy balance  enabled to conclude that the energy gain by convection air/objects is  superior to the air pump energy to overcome the pressure drop.