Hydrothermal index and entropy generation of a heated cylinder placed between two oppositely rotating cylinders in a vented cavity

In this work, hydrothermal behavior and entropy generation of a heated cylinder placed between two oppositely rotating cylinders inside a vented cavity is studied numerically using the finite volume technique. The mixed convection of a steady, 2D, and laminar flow is considered for the flow through the vented cavity. For counter-rotating cylinders, according to the center of the heated cylinder, two different vertical distances, Zy and three different horizontal distances, Zx are investigated with angular rotational speeds, Omega ranging from 0 to 15. The influence of relevant parameters on hydrothermal behavior, such as Reynolds number (100 <= Re <= 500) and Grashof number (10(3) <= Gr <= 10(6) ) is taken into account throughout the simulations. The numerical results are exposed in terms of various qualitative and quantitative figures. Regardless of the position of counter-rotating cylinders, results show that the optimal thermal performance criterion, xi is achieved at low Reynolds number (Re = 100) over the ranges of angular rotational speeds, Omega.

Automated summary

In this study, the hydrothermal behavior and entropy generation of a heated cylinder in a vented cavity between two oppositely rotating cylinders were numerically investigated using the finite volume technique. The results showed that the optimal thermal performance criterion was achieved at low Reynolds number regardless of the position of the counter-rotating cylinders.