aLaboratory of Thermodynamic and Energetic, University of Bechar B.P. 417, Bechar, Algeria
bLaboratory of Multiphase Transport and Porous Media, Faculty of Mechanical, University of Sciences and Technology-Houari Boumediene, Algiers, Algeria.
cLaboratory of Mathematics and System Physics - Group of Energetic Mechanic University of Perpignan, 52 avenue de Villeneuve-66860 Perpignan, France.
Two-dimensional laminar flow and heat transfer in the entrance region of a symmetric wavy-channel with constant wall heat flux density which includes fourteen undulations are presented. Numerical solutions are obtained using the control-volume finite-difference method. Thermal and flow fields, Nusselt number and shear stress are presented for different flow rates (100≤ Re ≤ 1500), amplitude of wavy surface (0 ≤ A ≤ 0.5) and Prandtl number values. The results show that the wavy-wall generates vortices in the hollow region, which grow in magnitude and spatial flow coverage with increasing Re and/or A. The shear stress and the Nusselt number increase with increasing the Reynolds number and have the highest magnitude in the entrance region. The increase of average Nusselt number is found limited with the increase of the amplitude.
Forced convection, laminar flow, entrance region, wavy channel, heat transfer
