Effect of Emissivity on the Heat and Mass Transfer of Humid Air in a Cavity Filled with Solid Obstacles

Iyi, Draco, Hasan, Reaz and Penlington, Roger (2015) Effect of Emissivity on the Heat and Mass Transfer of Humid Air in a Cavity Filled with Solid Obstacles. Numerical Heat Transfer, Part A: Applications, 67 (5). pp. 531-546. ISSN 1040-7782

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Official URL: http://dx.doi.org/10.1080/10407782.2014.937261

Abstract

The work reported here is a 2D numerical study on the buoyancy-driven low-speed turbulent flow of humid air inside a rectangular cavity partially filled with solid cylindrical objects for a Rayleigh number of 1.45 × 109. Variations of Nusselt number, buoyancy flux, vapor mass fraction, and turbulence viscosity ratio are presented for various emissivity values of wall surfaces. It was observed that during the natural convection process, radiation effects are very significant and the air/water vapor combination results in a small increase in heat transfer as compared with the pure natural convection of dry air.

Item Type: Article
Subjects: H100 General Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Becky Skoyles
Date Deposited: 05 Jan 2015 09:15
Last Modified: 08 Oct 2015 13:59
URI: http://nrl.northumbria.ac.uk/id/eprint/18532

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