Coupled magneto-buoyant convection and radiation in an inclined enclosure

Jena, Sofen K.; Mahapatra, S.S.; Sarkar, A.

doi:10.1108/hff-06-2012-0127

Cited by 3 publications

(3 citation statements)

References 52 publications

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“…Talukdar (2011) carried out the impact of non-gray radiation on mixed convection in a horizontal rectangular cavity, modeling radiation with the weighted sum of gray gases (WSGG) model and generating an error of ±10% over a non-gray model. Jena et al (2014) discussed the impact of participating gas radiation and magneto-buoyant convection in an inclined cavity. They showed that for an optically thick medium, magnetic field and radiation affect the thermal field and flow structure in the entire domain.…”

Section: Introductionmentioning

confidence: 99%

Interaction of mixed convection with non-gray gas radiation in a partially heated horizontal pipe: entropy generation analysis

Mazgar

Jarray

Hajji

et al. 2021

HFF

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Purpose This paper aims to numerically analyze the effect of non-gray gas radiation on mixed convection in a horizontal circular duct with isothermal partial heating from the sidewall. The influence of heater location on heat transfer, fluid flow and entropy generation is given and discussed in this study. Design/methodology/approach The numerical computation of heat transfer and fluid flow has been developed by the commercial finite element software COMSOL Multiphysics. Radiation code is developed based on the T10 Ray-Tracing method, and the radiative properties of the medium are computed based on the statistical narrow band correlated-k model. Findings The obtained results depicted that the radiation considerably contributes to the temperature homogenization of the gas. The findings highlight the impact of the heater location on swirling flow. It is also shown that the laterally heating process provides better energy efficiency than heating from the top of the enclosure. Originality/value This study is performed to improve heat transfer and to minimize entropy generation. Therefore, it is conceivable to improve the model design of industrial applications.

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Section: Introductionmentioning

confidence: 99%

Interaction of mixed convection with non-gray gas radiation in a partially heated horizontal pipe: entropy generation analysis

Mazgar

Jarray

Hajji

et al. 2021

HFF

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“…Especially noteworthy are recent studies of linear instability and of nonlinear stability which are developed in Harfash (2014aHarfash ( , b, c, d, 2015a, Ahmed et al (2014), Hossain et al (2013), Kuznetsov (2013), Saleem et al (2013), Lin and Chen (2013). Applications for some convection models have been developed and analyzed in Jena et al (2013), Rashidi et al (2012Rashidi et al ( , 2013. More recently, studies have been conducted into the effects of a heat source/sink that demonstrates linear variation with the vertical height z (Straughan, 2012) on the stability of thermally stratified fluids.…”

Section: Introductionmentioning

confidence: 99%

On the stationary and oscillatory modes of triply resonant penetrative convection

Harfash

Alshara

2016

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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Purpose – The purpose of this paper is to explore a model for thermal convection in a plane layer when the density-temperature relation in the buoyancy term is quadratic. A heat source/sink varying in a linear fashion with a vertical height expressed as z was allowed, functioning as a heat sink in an area of the layer and as a heat source in the remainder. Design/methodology/approach – First, the authors present the governing equations of motion and derive the associated perturbation equations. Second, the authors introduce the linear and nonlinear analysis of the system. Third, the authors transform the system to velocity-vorticity-potential formulation and introduce a numerical study of the problem in three dimensions. Findings – First, the linear instability and nonlinear stability thresholds are derived. Second, the linear instability thresholds accurately predict the onset of instability. Third, the required time to arrive at the steady state increases as Ra tends to RaL . Fourth, the authors find that the convection has three different interesting patterns. Originality/value – With the modernday need for heat transfer or insulation devices in industry, particularly those connected with nanotechnology, the usefulness of a mathematical analysis of such resonance became apparent. Thus, this study is believed to be of value.

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“…Luo et al (2014) analyzed the thermal radiation effects on magnetohydrodynamics free convection by employing Chebyshev collocation spectral method. Jena et al (2014) found that thermal radiation could suppress convection as it reduces the local temperature difference. For an optically thin medium, the radiation effect on a thermal field is limited in the vicinity of the adiabatic walls.…”

Section: Introductionmentioning

confidence: 99%

The Radiation Effect on the Thermo-Magnetic Convection in Participating Paramagnetic Medium under Microgravity Condition

Wang¹,

Tan²

2015

JAFM

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The radiation effect on the thermo-magnetic convection which occurs in participating paramagnetic medium under microgravity (g = 0) condition is numerically investigated. Different from the electrically conducting fluid, the paramagnetic fluid is driven by Kelvin force which is proportional to the product of magnetic susceptibility and the gradient of the square of the magnetic induction and is introduced into the source term of the Navier-Stokes equation. In order to realize the fluid flow, an external magnetic field with uniform or non-uniform magnetic gradient is imposed. Further, the thermo-magnetic convection is carried out in high temperature field, in which the magnetic susceptibility varies greatly with absolute temperature according to Curie's law, and the radiation field is also modified by the absorbing-emitting paramagnetic medium. In the present study, the effects of magnetic Rayleigh number and optical thickness are investigated. The results show that radiative heat transfer plays a significant role in thermo-magnetic convection.

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Coupled magneto-buoyant convection and radiation in an inclined enclosure

Cited by 3 publications

References 52 publications

Interaction of mixed convection with non-gray gas radiation in a partially heated horizontal pipe: entropy generation analysis

Interaction of mixed convection with non-gray gas radiation in a partially heated horizontal pipe: entropy generation analysis

On the stationary and oscillatory modes of triply resonant penetrative convection

The Radiation Effect on the Thermo-Magnetic Convection in Participating Paramagnetic Medium under Microgravity Condition

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