THERMAL SCIENCE

International Scientific Journal

Tianxiang Wang

,

Yinan Qiu

,

Gang Lei

,

Jinjin Zhang

,

Yonghua Huang

,

Guang Yang

TRANSIENT CHARACTERISTICS OF COUPLED THERMAL RADIATION AND NATURAL CONVECTION IN A 3-D CYLINDRICAL CAVITY CONTAINING A HEATED PLATE

ABSTRACT
In this study, a numerical study of transient combined natural-convection and surface radiation in a cylindrical cavity with a heated plate placed inside is carried out using the open-source platform OpenFOAM. The effects of the Rayleigh number (105 ≤ Ra ≤ 107), inclination angle (0º ≤ φ ≤ 90º), and surface emissivity (0 ≤ ε ≤ 1) on the velocity components, temperature field, and Nusselt number are investigated in detail. Results show that the Rayleigh number has a greater effect on the radiative heat transfer than on natural-convection. Radiative heat transfer increases monotonously with the increase of surface emissivity, and its contribution could be over 50% of the total heat transfer rate. The inclination angle of the plate affects the flow structure, but the difference in total Nusselt number is less than 10% for various inclination angles. Results in this study provide insights into the transient characteristics of coupled thermal radiation and natural-convection in a 3-D cavity and will guide the optimal design of related devices.
KEYWORDS
natural convection, radiation, numerical simulation, dynamic characteristics, heated plates
PAPER SUBMITTED: 2022-05-23
PAPER REVISED: 2022-08-09
PAPER ACCEPTED: 2022-08-16
PUBLISHED ONLINE: 2022-09-10
DOI REFERENCE: https://doi.org/10.2298/TSCI220523135W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 3, PAGES [2377 - 2390]
REFERENCES
  1. Cheng, T. C., et al., Combined natural convection and radiation with temperature-dependent properties, Thermal Science, 22 (2018), 2, pp. 921-930
  2. Astanina, M. S., et al., Effect of thermal radiation on natural convection in a square porous cavity filled with a fluid of temperature-dependent viscosity, Thermal Science, 22 (2018), 1B, pp. 391-399.
  3. Qasem, S. A., et al., Effect of thermal radiation on natural conviction of a nanofluid in a square cavity with a solid body, Thermal Science, 25 (2021), 3A, pp. 182-182
  4. Benyahia, N., et al., Coupling turbulent natural convection-radiation-conduction in differentially heated cavity with high aspect ratio, International Journal of Thermal Sciences, 158 (2020), pp. 106518
  5. Chandrakar, V., et al., Conjugate heat transfer due to conduction, natural convection, and radiation from a vertical hollow cylinder with finite thickness, Numerical Heat Transfer, Part A, 79 (2021), 6, pp. 463-487
  6. Colomer, G., et al., Three-dimensional numerical simulation of convection and radiation in a differentially heated cavity using the discrete ordinates method, International Journal of Heat and Mass Transfer, 47 (2004), 2, pp. 257-269
  7. Mahapatra, S. K., et al., Interaction of surface radiation and variable property natural convection in a differentially heated square cavity - a finite element analysis, International Journal of Numerical Methods for Heat and Fluid Flow, 9 (1999), 4, pp. 423-443
  8. Mezrhab, A., et al., Computation of combined natural-convection and radiation heat-transfer in a cavity having a square body at its center, Applied Energy, 83 (2006), 9, pp. 1004-1023
  9. Mikhailenko, S. A., et al., Natural convection combined with surface radiation in a rotating cavity with an element of variable volumetric heat generation, Energy, 210 (2021), pp. 118543
  10. Sun, H., et al., Effect of surface radiation on the breakdown of steady natural convection flows in a square, air-filled cavity containing a centered inner body, Applied Thermal Engineering, 31 (2011), 6, pp. 1252-1262
  11. El Moutaouakil, L., et al., Natural convection and surface radiation heat transfer in a square cavity with an inner wavy body, International Journal of Thermophysics, 41 (2020), 109, pp. 1-21
  12. El Moutaouakil, L., et al., Natural convection and radiation in a cavity with a partially heated cylinder, Journal of Thermophysics and Heat Transfer, 35 (2021), 2, pp. 312-322
  13. Nia, M. F., et al., Transient combined natural convection and radiation in a double space cavity with conducting walls, International Journal of Thermal Sciences, 128 (2018), pp. 94-104
  14. Yang, G., Wu J., Effects of natural convection, wall thermal conduction, and thermal radiation on heat transfer uniformity at a heated plate located at the bottom of a three-dimensional rectangular enclosure, Numerical Heat Transfer, Part A, 69 (2016), 6, pp. 589-606
  15. Ghernoug, C., et al., The natural convection in annular space located between two horizontal eccentric cylinders: the Grashof number effect, Energy Procedia, 36 (2013), pp. 293-302
  16. Wu, S. Y., et al., Effect of aperture position and size on natural convection heat loss of a solar heat-pipe receiver, Applied Thermal Engineering, 31 (2011), 14, pp. 2787-2796
  17. Zhang, K., et al., Two- and three-dimensional numerical simulations of natural convection in a cylindrical envelope with an internal concentric cylinder with slots, International Journal of Heat and Mass Transfer, 70 (2014), pp. 434-438
  18. Wu, S. Y., et al., Numerical investigation on combined natural convection and radiation heat losses in one side open cylindrical cavity with constant heat flux, International Journal of Heat and Mass Transfer, 71 (2014), pp. 573-584
  19. Shen, Z. G., et al., Experimental and numerical investigations of combined free convection and radiation heat transfer in an upward-facing cylindrical cavity, International Journal of Thermal Sciences, 89 (2015), pp. 314-326
  20. Roy, N., et al., Electrohydrodynamics and thermal radiation effects on natural convection flow in an enclosed domain, International Communications in Heat and Mass Transfer, 126 (2021), pp. 105437
  21. Sieres, J., et al., Natural convection air flow in vertical upright-angled triangular cavities under realistic thermal boundary conditions, Thermal Science, 20 (2016), 5, pp.1407-1420
  22. Yang, G., et al. Flow reversal and entropy generation due to buoyancy assisted mixed convection in the entrance region of a three dimensional vertical rectangular duct, International Journal of Heat and Mass Transfer, 67 (2013), pp. 741-751
  23. Siegel, R., Howell, J., Thermal Radiation Heat Transfer, Taylor and Francis, New York, USA, 2002
  24. OpenFOAM, User guide 2020, www.openfoam.com/documentation/user-guide
  25. Saravanan, S., Sivaraj, C., Coupled thermal radiation and natural convection heat transfer in a cavity with a heated plate inside, International Journal of Heat and Fluid Flow, 40 (2013), pp.54-64
  26. Huang, Y. et al. Large eddy simulation and experimental study of turbulent mixed convection inside a cavity with large Rayleigh number: Effect of buoyancy, Building and Environment, 151 (2019), pp. 268-279
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Transient characteristics of coupled thermal radiation and natural convection in a 3-D cylindrical cavity containing a heated plate

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence