Numerical study of laminar natural convection inside square enclosure with single horizontal fin
TL;DR: In this paper, a numerical study for laminar natural convection inside a square enclosure with a single horizontal fin attached to its hot wall has been carried out The enclosure horizontal surfaces are adiabatic, the left wall is hot while the right one is cold The Prandtl number for the flow inside the enclosure is 071.
About: This article is published in International Journal of Thermal Sciences.The article was published on 2016-01-01. It has received 90 citations till now. The article focuses on the topics: Annular fin & Fin (extended surface).
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TL;DR: In this paper, the effect of magnetic field on the natural convection of Al2O3-water nanofluid inside a square enclosure with isothermal obstacles and sinusoidal wall temperature distribution has been numerically studied.
134 citations
TL;DR: In this paper, the authors investigated the natural convection heat transfer inside a PCM container that can be a representative model for PV/PCM systems by considering three aspect ratios (AR = 1, 2 and 4), three Rayleigh numbers (Ra = 104, 105 and 106), two types of fins as rectangular and tree-like branching fin, and three different length-to-height ratio of rectangular fin.
89 citations
TL;DR: In this paper, a numerical analysis has been performed to investigate two-dimensional natural convection inside a differentially heated inclined rectangular enclosure with several porous fins attached to the hot wall.
64 citations
TL;DR: In this paper, the effects of electromagnetic forces, thermal conductivity, and inclination angle of pin fin were investigated using non-dimensional parameters, and an extensive sensitivity analysis was conducted seeking an optimal heat transfer setting.
Abstract: This article studies buoyancy-driven natural convection of a nanofluid affected by a magnetic field within a square enclosure with an individual conductive pin fin. The effects of electromagnetic forces, thermal conductivity, and inclination angle of pin fin were investigated using non-dimensional parameters. An extensive sensitivity analysis was conducted seeking an optimal heat transfer setting. The novelty of this work lies in including different contributing factors in heat transfer analysis, rigorous analysis of design parameters, and comprehensive mathematical analysis of solution domain for optimization. Results showed that magnetic strength diminished the heat transfer efficacy, while higher relative thermal conductivity of pin fin improved it. Based on the problem settings, we also obtained the relative conductivity value in which the heat transfer is optimal. Higher sensitivity of heat transfer was, though, noticed for both magnetic strength and fin thermal conductivity in comparison to fin inclination angle. Further studies, specifically with realistic geometrical configurations and heat transfer settings, are urged to translate current findings to industrial applications.
59 citations
TL;DR: In this article, the effect of geometrical parameters on natural convection of nanofluid over a cylindrical heater located inside of a porous undulant-wall cavity using local thermal non-equilibrium (LTNE) condition was investigated.
50 citations
References
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01 Jan 1980
TL;DR: In this article, the authors focus on heat and mass transfer, fluid flow, chemical reaction, and other related processes that occur in engineering equipment, the natural environment, and living organisms.
Abstract: This book focuses on heat and mass transfer, fluid flow, chemical reaction, and other related processes that occur in engineering equipment, the natural environment, and living organisms. Using simple algebra and elementary calculus, the author develops numerical methods for predicting these processes mainly based on physical considerations. Through this approach, readers will develop a deeper understanding of the underlying physical aspects of heat transfer and fluid flow as well as improve their ability to analyze and interpret computed results.
21,858 citations
TL;DR: In this article, the results of an experimental and numerical study of free convective heat transfer in a square enclosure characterized by a discrete heater located on the lower wall and cooled from the lateral walls were analyzed.
265 citations
TL;DR: In this paper, a finite volume-based computational study of steady laminar natural convection (using Boussinesq approximation) within a differentially heated square cavity due to the presence of a single thin fin is presented.
Abstract: A finite-volume-based computational study of steady laminar natural convection (using Boussinesq approximation) within a differentially heated square cavity due to the presence of a single thin fin is presented. Attachment of highly conductive thin fins with lengths equal to 20, 35 and 50 percent of the side, positioned at 7 locations on the hot left wall were examined for Ra=10 4 , 10 5 , 10 6 , and 10 7 and Pr=0.707 (total of 84 cases). Placing a fin on the hot left wall generally alters the clockwise rotating vortex that is established due to buoyancy-induced convection. Two competing mechanisms that are responsible for flow and thermal modifications are identified. One is due to the blockage effect of the fin, whereas the other is due to extra heating of the fluid that is accommodated by the fin. The degree of flow modification due to blockage is enhanced by increasing the length of the fin. Under certain conditions, smaller vortices are formed between the fin and the top insulated wall
208 citations
TL;DR: In this paper, a numerical study has been carried out in differentially heated square cavities, which are formed by horizontal adiabatic walls and vertical isothermal walls, where a thin fin is attached on the active wall.
203 citations
TL;DR: In this article, the effect of conduction in the wall on the natural convection flow in a square enclosure has been analyzed numerically, and three separate models to account for the wall conduction are investigated: (i) the complete conjugate case in which conduction was assumed to be fully two-dimensional, (ii) a one-dimensional model in which the wall convection in the horizontal direction only, and (iii) a lumped parameter approach which assumed the solid-fluid interface temperature to be uniform.
138 citations