1Laboratory of Thermodynamic and Energetic University of Bechar B.P. 417, Bechar, Algeria.
2Laboratory of Thermo-Fluids, Institute of Mechanical Engineering, University of Sciences and Technology-Houari Boumediene, Algiers, Algeria.
3Laboratory of Mathematics and System Physics - Group of Energetic Mechanic University of Perpignan, 52 avenue de Villeneuve-66860 Perpignan, France.
Laminar forced convection in the entrance zone in a two-dimensional converging-diverging channel with sinusoidal wall corrugations is numerically simulated. The wavy surface of the channel lower wall is maintained to a temperature which is twice the upper wall temperature. Numerical solutions are obtained using the control-volume finite-difference method. Development of the hydrodynamic, thermal fields, Nusselt number and viscous constraint tangential are presented for different flow rates (100 ≤ Re ≤ 1500), wall corrugations severity (0 ≤ A ≤ 0.5) and prandtl number values. In the channel entrance region, the viscous constraint tangential as well as the local Nusselt number are characterized by a very fast decrease and their amplitudes increase with increasing the wall corrugations and the Reynolds number. The periodicity character as well as the maximal velocity are influenced by variations of the rate corrugation and the Reynolds number.
Forced convection, Laminar flow, Entrance region, Wavy channel
