Effect of buoyancy force on turbulent modes of complex heat transfer in an air-filled square cavity

Abstract

Turbulent natural convection with the interaction of surface radiation in square enclosure has been numerically studied. The governing equations are solved contemporaneously by finite difference method to obtain the velocity, temperature and heat flux distributions. Turbulence has been modeled using the standard k-ε model. The change of convective and radiative Nusselt numbers with respect to time has been described. The analysis is carried out over a wide range of Rayleigh number from 10⁸ to 10¹⁰. The effect of this key parameter on temperature and velocity distributions, convective and radiative Nusselt numbers has been investigated. The results clearly demonstrate a significant effect of buoyancy ratio on unsteady turbulent heat transfer.

Original language	English
Title of host publication	IOP Conference Series: Materials Science and Engineering
Publisher	Institute of Physics Publishing
Volume	93
Edition	1
DOIs	https://doi.org/10.1088/1757-899X/93/1/012008
Publication status	Published - 13 Oct 2015
Event	21st International Conference for Students and Young Scientists: Modern Technique and Technologies, MTT 2015 - Tomsk, Russian Federation Duration: 5 Oct 2015 → 9 Oct 2015

Other

Other	21st International Conference for Students and Young Scientists: Modern Technique and Technologies, MTT 2015
Country	Russian Federation
City	Tomsk
Period	5.10.15 → 9.10.15

ASJC Scopus subject areas

Engineering(all)
Materials Science(all)

Access to Document

10.1088/1757-899X/93/1/012008

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Miroshnichenko, IV & Sheremet, MA 2015, Effect of buoyancy force on turbulent modes of complex heat transfer in an air-filled square cavity. in IOP Conference Series: Materials Science and Engineering. 1 edn, vol. 93, 012008, Institute of Physics Publishing, 21st International Conference for Students and Young Scientists: Modern Technique and Technologies, MTT 2015, Tomsk, Russian Federation, 5.10.15. https://doi.org/10.1088/1757-899X/93/1/012008

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abstract = "Turbulent natural convection with the interaction of surface radiation in square enclosure has been numerically studied. The governing equations are solved contemporaneously by finite difference method to obtain the velocity, temperature and heat flux distributions. Turbulence has been modeled using the standard k-ε model. The change of convective and radiative Nusselt numbers with respect to time has been described. The analysis is carried out over a wide range of Rayleigh number from 108 to 1010. The effect of this key parameter on temperature and velocity distributions, convective and radiative Nusselt numbers has been investigated. The results clearly demonstrate a significant effect of buoyancy ratio on unsteady turbulent heat transfer.",

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N2 - Turbulent natural convection with the interaction of surface radiation in square enclosure has been numerically studied. The governing equations are solved contemporaneously by finite difference method to obtain the velocity, temperature and heat flux distributions. Turbulence has been modeled using the standard k-ε model. The change of convective and radiative Nusselt numbers with respect to time has been described. The analysis is carried out over a wide range of Rayleigh number from 108 to 1010. The effect of this key parameter on temperature and velocity distributions, convective and radiative Nusselt numbers has been investigated. The results clearly demonstrate a significant effect of buoyancy ratio on unsteady turbulent heat transfer.

AB - Turbulent natural convection with the interaction of surface radiation in square enclosure has been numerically studied. The governing equations are solved contemporaneously by finite difference method to obtain the velocity, temperature and heat flux distributions. Turbulence has been modeled using the standard k-ε model. The change of convective and radiative Nusselt numbers with respect to time has been described. The analysis is carried out over a wide range of Rayleigh number from 108 to 1010. The effect of this key parameter on temperature and velocity distributions, convective and radiative Nusselt numbers has been investigated. The results clearly demonstrate a significant effect of buoyancy ratio on unsteady turbulent heat transfer.

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