ABSTRACT

This paper studies the heat transfer between two cylinders held in a square-shaped and thermally insulated chamber. The two cylinders rotate at constant speed. The right cylinder has a hot wall the left one is cold. The chamber is filled with water (Pr = 6.01) for the purpose of transferring heat between the two cylinders. The heat pattern used in this research is convective and mixed, so the values of the studied Richardson number are limited between 0 and 1. The speed of rotation of the cylinders is expressed by Re number. The experiment was carried out in numerical way based on the finite-volume method used in principle by ANSYS-CFX. The points studied here are the speed and the direction of rotation of the cylinders; and the intensity of thermal buoyancy force. The results of the work showed that the direction of the rotation of the cylinders has a strong influence on the quality of heat transfer, especially when the thermal pattern is mixed.

KEYWORDS

thermal transfer, rotational cylinder, mixed convection, numerical simulation, heat exchangers.