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Type: Artigo
Title: Analysis of magnetohydrodynamic natural convection in closed cavities through integral transforms
Author(s)/Inventor(s): Matt, Carlos Frederico Trotta
Quaresma, João Nazareno Nonato
Cotta, Renato Machado
Abstract: Indisponível.
Abstract: A hybrid numerical-analytical solution is proposed to analyze MHD (magnetohydrodynamic) natural convection of an electrically-conducting fluid within a square cavity, differentially heated at the sidewalls and subjected to an inclined external magnetic field. The first goal is to expand the spectrum of application of the so called Generalized Integral Transform Technique (GITT), dealing with a multiphysics formulation, while further demonstrating the relative merits of the proposed eigenfunction expansion approach in handling highly nonlinear and coupled systems of partial differential equations. The second goal is to provide a set of benchmark results in this important application for quantities of practical interest in determining the heat transfer rates, such as the average Nusselt number. The two-dimensional steady state equations are written in dimensionless form using the streamfunction-only formulation and are subsequently solved with the GITT approach, under automatic relative error control. Critical comparisons are performed against previous work reported in the literature, both computational and experimental, together with the corresponding physical interpretations, for different values of the governing parameters, such as Grashof number, Hartmann number, Prandtl number, and magnetic field inclination angle.
Keywords: Magnetohydrodynamics
Natural convection
Closed cavities
Electrically-conducting fluid
Hybrid methods
Integral transforms
Production unit: Núcleo Interdisciplinar de Dinâmica dos Fluidos
Publisher: Elsevier
In: International Journal of Heat and Mass Transfer
Volume: 113
Issue Date: 3-Jun-2017
DOI: 10.1016/j.ijheatmasstransfer.2017.05.043
Publisher country: Brasil
Language: eng
Right access: Acesso Aberto
ISSN: 0017-9310
Appears in Collections:Engenharias

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