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Journal of Porous Media
インパクトファクター: 1.49 5年インパクトファクター: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN 印刷: 1091-028X
ISSN オンライン: 1934-0508

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

Journal of Porous Media

DOI: 10.1615/JPorMedia.v19.i2.20
pages 113-129

LOCAL THERMAL NONEQUILIBRIUM EFFECTS ON NATURAL CONVECTION IN A POROUS CAVITY HEATED AND COOLED FROM THE SIDE IN A SPATIALLY SINUSOIDAL MANNER

Feng Wu
School of Chemical Engineering, Northwest University, Taibai North Road 229, Xi'an 710069, China
Wenjing Zhou
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

要約

Steady non-Darcy natural convection in a rectangular cavity filled with a heat-generating porous medium is studied numerically by adopting the local thermal nonequilibrium (LTNE) model in this article. All of the walls of the enclosure are adiabatic except the left wall, which is partially heated and cooled with a sinusoidal temperature profile. The results show that, compared with the uniform boundary conditions, the sinusoidal boundary conditions enhance the heat transfer rate of porous cavity. Under the same boundary conditions, the LTNE and local thermal equilibrium models can lead to significant differences inflow patterns and temperature fields. When the periodicity parameter becomes large enough (N = 30), the uniform thermal boundary condition and sinusoidal thermal boundary condition have the same effects on heat transfer of the porous cavity. A high interphase heat transfer coefficient (H = 1000) can lead to faster reduction of the heat transfer of the porous cavity with the increase of periodicity parameter. A high thermal conductivity ratio (γ = 1) can slow down the reduction speed of convective heat transfer when the periodicity parameter (N) increases.


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