Natural convection of a radiating fluid in a square enclosure with perfectly conducting end walls

Yücel, Adnan; Acharya, Sumanta; Williams, Mark L.

doi:10.1007/bf02744403

Cited by 8 publications

(2 citation statements)

References 17 publications

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“…They used Discrete Ordinates Method (DOM) to solve the RTE. Also these same authors analyzed the changes in the buoyant flow patterns and temperature distributions due to the presence of radiation in inclined or heat generating enclosures (Yucel et al, 1994). In the same trend Draoui et al (1991) used the P1 method to analyze the effects of radiation and natural convection on the heat transfer process in a square enclosure.…”

Section: Introductionmentioning

confidence: 99%

İzotropi̇k Saçilma Ortamli Kare Geometri̇ İçi̇nde Türbülansli Doğal Taşinim Ve Işinim Isi Transferi̇

Tekkalmaz

2020

Isı Bilimi Ve Tekniği Dergisi

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The influence of turbulent natural convection and thermal radiation in a differentially heated square enclosure is numerically investigated. The enclosure is heated from the right wall and cooled from the left wall. The other walls are assumed to be adiabatic. The Reynolds Averaged Navier Stokes (RANS) formulation was employed for analyzing turbulent flows together with a Realizable k- model. In addition, the discrete ordinates method (DOM) was used to solve the radiative transfer equation (RTE). Influence of Rayleigh number (Ra), optical thickness (), Planck number (Pl), scattering albedo () and wall emissivity (w ) parameters were studied numerically on square enclosure for the flow and temperature distribution. It is interesting to note that a detailed parametric study focusing on characterizing parameters in turbulent natural convection and radiation was rarely dealt with in details. Solutions were obtained for a range of Rayleigh numbers varying from 10 9 to 10 12. It was found that the radiation heat transfer alters the characteristics of flow fields in the enclosure. Increasing the optical thickness results in a decrease in combined heat transfer for a fixed Rayleigh number and the maximum of heat transfer occurred for low optical thickness with radiation presence. t Nu =87.796 and 82.351 is obtained for =0.2 and 5, respectively (Ra=10 10 , Pl=0.02 and =0). The heat transfer increases with decreasing Planck number, and decreases with the increasing scattering albedo. t Nu =445.837 and 68.100 is obtained for Pl=0.001 and 10, respectively (Ra=10 10 , =1 and =0). When the active walls are black and the insulated walls are reflected, t Nu =85.507 is obtained for Ra=10 10 , Pl=0.02, =1 and =0.

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Section: Introductionmentioning

confidence: 99%

İzotropi̇k Saçilma Ortamli Kare Geometri̇ İçi̇nde Türbülansli Doğal Taşinim Ve Işinim Isi Transferi̇

Tekkalmaz

2020

Isı Bilimi Ve Tekniği Dergisi

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“…Conjugate heat and mass transfer by natural convection is present in several engineering problems like nuclear reactors, combustion, drying process, solar still devices, electronics devices, thermal comfort, etc [1][2][3][4]. In the last 25 years, the study of conjugate heat transfer with participating media has increased due to the advances in computational technology, especially in those topics of natural convection and radiation [5][6][7][8][9][10] and natural heat and mass transfer convection [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of laminar and turbulent flow with radiatively participating media

et al. 2019

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The effect of radiation of a gray gas in a square cavity with double diffusive natural convection is presented. The regime flow studied range from a thermal Rayleigh number 4 11 of 10 to 10 and buoyancy ratio from 0.5 to 2.0. The governing equations of fluid-flow, heat transfer and radiative transfer equation are solved by the finite volume method. The results show the effect of radiatively participating media plays an important role in the heat and mass transfer study doing oblique stratification. The velocity and turbulent viscosity increases about 80% and 22%, respectively, and decreases the convective Nusselt number 13%. The increase of buoyancy ratio increases the mass transfer until 26%. Finally, a practical correlation for computing the convective and radiative Nusselt numbers as well as the Sherwood number is proposed.

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Combined effect of natural convection and non-gray gas radiation with partial heating

Mazgar

Nejma

2016

Sādhanā

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Natural convection of a radiating fluid in a square enclosure with perfectly conducting end walls

Cited by 8 publications

References 17 publications

İzotropi̇k Saçilma Ortamli Kare Geometri̇ İçi̇nde Türbülansli Doğal Taşinim Ve Işinim Isi Transferi̇

İzotropi̇k Saçilma Ortamli Kare Geometri̇ İçi̇nde Türbülansli Doğal Taşinim Ve Işinim Isi Transferi̇

Numerical study of laminar and turbulent flow with radiatively participating media

Combined effect of natural convection and non-gray gas radiation with partial heating

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