Effects of Slotted Structures on Nonlinear Characteristics of Natural Convection in a Cylinder with an Internal Concentric Slotted Annulus

TL;DR

This study investigates how various slotted structures influence the nonlinear behavior of natural convection within a cylinder, revealing effects on heat transfer and flow stability through numerical simulations.

Contribution

It introduces a detailed analysis of the impact of internal slotted structures on nonlinear convection characteristics using numerical methods.

Findings

Heat transfer increases with Rayleigh number.

Flow transitions from steady to unsteady with higher Rayleigh numbers.

Slotted structures significantly affect nonlinear convection behavior.

Abstract

Natural convection in a cylinder with an internally slotted annulus was solved by SIMPLE algorithm, and the effects of different slotted structures on nonlinear characteristics of natural convection were investigated. The results show that the equivalent thermal conductivity Keq increases with Rayleigh number, and reaches the maximum in the vertical orientation. Nonlinear results were obtained by simulating the fluid flow at different conditions. With increasing Rayleigh number, heat transfer is intensified and the state of heat transfer changes from the steady to unsteady. We investigated different slotted structures effects on natural convection, and analyze the corresponding nonlinear characteristics.