Journal ArticleDOI
Investigation of natural convection via heatlines for Rayleigh–Bénard heating in porous enclosures with a curved top and bottom walls
Pratibha Biswal,Tanmay Basak +1 more
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TLDR
In this article, the heatline-based analysis of natural convection in porous cavities with the curved top and bottom walls involving the Rayleigh-Benard heating was conducted, and the results showed that the wall-to-wall heatlines were observed for all the cases at the low Dam involving two test cases, Prm 0.015 and 7.2.Abstract:
The current study deals with the heatline-based analysis of natural convection in porous cavities with the curved top and bottom walls involving the Rayleigh–Benard heating. The streamline cells are weak, and the wall-to-wall heatlines are observed for all the cases at the low Dam involving two test cases, Prm = 0.015 and 7.2. At the high Dam, the convective force takes the command, and multiple heatline cells are observed for all the concave (except for high wall concavity) and convex cases. The directions of the streamlines (for all Dam) and heatlines (at the high Dam) are exactly opposite for the concave and convex cases. The case 3 (concave) is the efficient case based on the largest heat transfer rate for Prm = 0.015 involving all Dam and for Prm = 7.2 involving the low Dam. At Prm = 7.2 and high Dam, the case 1 (concave or convex) may be the efficient cases compared with the cases involving high wall curvatures.read more
Citations
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Book ChapterDOI
Introduction to the Finite Element Method
Nathan Ida,João P. A. Bastos +1 more
TL;DR: This chapter introduces the finite element method (FEM) as a tool for solution of classical electromagnetic problems and discusses the main points in the application to electromagnetic design, including formulation and implementation.
Journal ArticleDOI
A comprehensive review and comparison on heatline concept and field synergy principle
Wen-Quan Tao,Ya-Ling He,Lei Chen +2 more
TL;DR: A comprehensive review and comparison on heatline concept and field synergy principle have been made based on more than two hundreds of related publications as mentioned in this paper, where the role and function of heat line concept is to visualize the heat transfer path while that of field synergy theory is to reveal the fundamental mechanism of heat transfer enhancement and to guide the development of enhanced structures.
Journal ArticleDOI
Mixed convection and heat flow characteristics in a lid-driven enclosure with porous fins: Full numerical modeling and parametric investigations
TL;DR: In this article, the effects of porous fins on mixed convection inside lid-driven square enclosures were reported, where the porous medium with varying permeability was used instead of the solid one.
Journal ArticleDOI
Role of heatlines on thermal convection within various porous containers involving identical area subjected to identical heat input
Leo Lukose,Tanmay Basak +1 more
TL;DR: In this paper, the role of heat lines on thermal management for the porous containers is depicted by tuning the dimensionless parameter, Darcy number (10 − 5 ≤ D a m ≤ 10 − 2 ) at Prandtl number, P r m = 155 (engine oil) and Rayleigh number, R a m = 10 6.
Journal ArticleDOI
Thermal strategy due to flame shape source in a carbon nanotubes-water enclosed by trapezoidal cavity
TL;DR: In this paper , the thermal performance of single wall carbon nanotubes (SWCNTs) was analyzed in a trapezoidal cavity with flame shape heated source to examine the effects on thermal distribution of heat inside the cavity and flow pattern.
References
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Book
An Introduction to the Finite Element Method
TL;DR: Second-order Differential Equations in One Dimension: Finite Element Models (FEM) as discussed by the authors is a generalization of the second-order differential equation in two dimensions.
Book ChapterDOI
Introduction to the Finite Element Method
Nathan Ida,João P. A. Bastos +1 more
TL;DR: This chapter introduces the finite element method (FEM) as a tool for solution of classical electromagnetic problems and discusses the main points in the application to electromagnetic design, including formulation and implementation.
Journal ArticleDOI
Boundary and inertia effects on flow and heat transfer in porous media
Kambiz Vafai,Chuen-Lin Tien +1 more
TL;DR: In this article, the effects of a solid boundary and the inertial forces on flow and heat transfer in porous media were analyzed, and a new concept of the momentum boundary layer central to the numerical routine was presented.
Journal ArticleDOI
Thermal dispersion in a porous medium
C.T. Hsu,Ping Cheng +1 more
TL;DR: The thermal dispersion conductivity tensor for convection in a porous medium is derived based on the method of volume averaging of the velocity and temperature deviations in the pores.
Journal ArticleDOI
Natural convective heat transfer in a fluid saturated variable porosity medium
TL;DR: In this article, a generalised non-Darcian porous medium model for natural convective flow has been developed taking into account linear and non-linear matrix drag components as well as the inertial and viscous forces within the fluid.
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