Effect of emissivity on the heat and mass transfer of humid air in a cavity filled with solid obstacles

Draco Iyi; Reaz Hasan; Roger Penlington

doi:10.1080/10407782.2014.937261

Effect of emissivity on the heat and mass transfer of humid air in a cavity filled with solid obstacles

Draco Iyi, Reaz Hasan, Roger Penlington

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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.

Original language	English
Pages (from-to)	531-546
Number of pages	16
Journal	Numerical Heat Transfer; Part A: Applications
Volume	67
Issue number	5
Early online date	10 Dec 2014
DOIs	https://doi.org/10.1080/10407782.2014.937261
Publication status	Published - 4 Mar 2015
Externally published	Yes

ASJC Scopus subject areas

Numerical Analysis
Condensed Matter Physics

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10.1080/10407782.2014.937261

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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.",

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AU - Hasan, Reaz

AU - Penlington, Roger

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AB - 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.

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Effect of emissivity on the heat and mass transfer of humid air in a cavity filled with solid obstacles

Abstract

ASJC Scopus subject areas

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