Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
Journal of Porous Media
Factor de Impacto: 1.49 Factor de Impacto de 5 años: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimir: 1091-028X
ISSN En Línea: 1934-0508

Volumes:
Volumen 22, 2019 Volumen 21, 2018 Volumen 20, 2017 Volumen 19, 2016 Volumen 18, 2015 Volumen 17, 2014 Volumen 16, 2013 Volumen 15, 2012 Volumen 14, 2011 Volumen 13, 2010 Volumen 12, 2009 Volumen 11, 2008 Volumen 10, 2007 Volumen 9, 2006 Volumen 8, 2005 Volumen 7, 2004 Volumen 6, 2003 Volumen 5, 2002 Volumen 4, 2001 Volumen 3, 2000 Volumen 2, 1999 Volumen 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v3.i2.40
16 pages

Application of the UNIFAES Discretization Scheme to Mixed Convection in a Porous Layer with a Cavity, Using the Darcy Model

Jorge Llagostera
Faculdade de Engenharia Mecanica, Departamento de Energia, Universidade Estadual de Campinas (UNICAMP), Caixa Postal 6122, 13090-970, Campinas-SP, Brazil
Jose R. Figueiredo
Faculdade de Engenharia Mecanica, Departamento de Energia, Universidade Estadual de Campinas (UNICAMP), Caixa Postal 6122, 13090-970, Campinas-SP, Brazil

SINOPSIS

Results of numerical simulations are presented on mixed convection in a two-dimensional, horizontal, saturated porous layer, with a cavity of varying depth on the bottom surface, heated from below. The problem formulation was based on the Darcy model to relate the velocity and the pressure fields, and on the Boussinesq hypothesis for the buoyancy effects. The convective-diffusive fluxes at the volume boundaries were represented using the unified finite approach exponential-type scheme (UNIFAES), with the power-law approximation to reduce the computing time. The conditions established by Rivas (1972) for the order of accuracy of the differencing schemes to be maintained in irregular grids allowed reliable accuracy estimates to be obtained. The steady-state regime was studied for Peclet numbers 1, 10, and 100; Rayleigh numbers between 1 and 2000; and cavity aspect ratios 0, 0.5, 1, and 2. Tabulated results for average Nusselt number and maximum and minimum stream function values are reported for the cases simulated. Maps of streamlines and isothermal lines are presented. For deep cavities, multiple steady-state solutions are reported.


Articles with similar content:

Base Solution for Natural Convection Flow in Isoflux Heated Cavity
ICHMT DIGITAL LIBRARY ONLINE, Vol.12, 2005, issue
Steven W. Armfield, S. Jiracheewanun, Geordie D. McBain, Masud Behnia
THE APPLICATION OF FLUX-CORRECTED TRANSPORT (FCT) TO HIGH RAYLEIGH NUMBER NATURAL CONVECTION IN A POROUS MEDIUM
International Heat Transfer Conference 8, Vol.5, 1986, issue
Melvin R. Baer, R. J. Gross, C. E. Hickox, Jr.
BUOYANCY EFFECT ON THE FLOW AND HEAT TRANSFER AROUND AN UNCONFINED HEATED SQUARE CYLINDER
ICHMT DIGITAL LIBRARY ONLINE, Vol.13, 2008, issue
Said Turki
Hybrid Solution for Convection Heat Transfer of Swirling Flows in Cylindrical Cavity with Rotating Top
International Heat Transfer Conference 15, Vol.18, 2014, issue
Joao N. N. Quaresma, Emanuel N. Macedo, Luiz M. Pereira, Carlos C. S. Cruz
Free Convection Heat Transfer and Flow Field in Triangular Enclosures Filled with Porous Media
Journal of Porous Media, Vol.11, 2008, issue 1
Hakan Fehmi Oztop, Yasin Varol, Asaf Varol