Enhancement of natural convection heat transfer in concentric annular space using inclined elliptical cylinder

Dublin Core

Title

Enhancement of natural convection heat transfer in concentric annular space using inclined elliptical cylinder

Description

The governing equations of continuity, momentum and energy are numerically solved to study the laminar natural convection heat transfer of Newtonian fluid confined within two concentric cylinders. The inner cylinder is elliptical cross-section with different aspect ratio E = 0.1 to 0.5 and it is considered to be hot, whereas the outer cylinder is circular and it is supposed to be cold.    The annular spacing between the cylinders is defined based on radii ratio (RR = 2.5). Also, the inner cylinder is inclined with an inclination angle (θ = 0 to 90). The main purpose of this study is to determine the effects of inclination angle (θ = 0° to 90°), aspect ratio of inner cylinder (E = 0.1 to 0.5), Prandtl number (Pr = 0.71 and 7.01) and Rayleigh number (Ra = 103 to 105) on fluid flow and heat transfer rate. The flow patterns and temperature distributions are potted in terms of streamlines and isotherms respectively. The obtained results showed that increase in inclination angle enhances the heat transfer rate of inner cylinder for all values of aspect ratio. Also, for the inclination angle          (θ = 90°), the decrease in aspect ratio (E) improves the heat transfer rate of inner cylinder.

Creator

Laidoudi, Houssem

Source

Journal of Naval Architecture and Marine Engineering; Vol. 17 No. 2 (2020); 89-99
2070-8998
1813-8535

Publisher

Association of Naval Architects and Marine Engineers

Date

2020-12-22

Rights

Copyright (c) 2020 Journal of Naval Architecture and Marine Engineering

Relation

Format

application/pdf

Language

eng

Type

info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

Identifier

Citation

Houssem Laidoudi, Enhancement of natural convection heat transfer in concentric annular space using inclined elliptical cylinder, Association of Naval Architects and Marine Engineers, 2020, accessed November 22, 2024, https://igi.indrastra.com/items/show/3319

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