Journal of Advanced Research in Science and Technology
Volume 6, Numéro 1, Pages 908-923
2019-02-28
Forced Convection Heat Transfer Of Power-law Fluids Around A Confined Obstacle Cylinders
Authors : Laidoudi Houssem .
Abstract
This paper presents a comprehensive computational work on hydrodynamic , and thermal study of two dimensional incompressible flow of non-Newtonian power law fluid over confined cylinder with four different cross-sectional profiles (square, hexagonal, octagonal, circular) in horizontal channel, the hexagonal and octagonal forms are assumed to be inclined with the angle (α), the research is investigated numerically in steady laminar flow, continuity, momentum and energy equations are solved by using ANSYS-CFX. The effects of cross-sectional form, inclination angle (α), Power-law index (n) on drag coefficient and Nusselt number, are studied under these conditions, (1 ≤ Re ≤ 40), (0 ≤ α ≤ 48), (0.4 ≤ n ≤ 1.6), blockage ration β = 0.25, and Pr = 50, This work addresses the combined characteristics of the flow and the heat transfer for power-law fluids around a new cross-sectional shapes, and expands the previous research in this field, the obtained results show the optimal inclination of hexagonal and octagonal cylinder. Moreover, The NDR shows that the hexagonal then the octagonal cross-sectional profiles respectively can be more efficient than circular cylinder.
Keywords
Power-Law fluids, Steady flow, Polygon cylinder, Drag force, Nusselt number, Heat transfer, Forced convection.
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