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Numerical Study of the Double Diffusion Natural Convection inside a Closed Cavity with Heat and Pollutant Sources Placed near the Bottom Wall

Author

Listed:
  • Juan Serrano-Arellano

    (Instituto Tecnológico Superior de Huichapan, ITESHU-TecNM, Huichapan, Hidalgo 42411, Mexico)

  • Juan M. Belman-Flores

    (Engineering Division, Campus Irapuato-Salamanca, University of Guanajuato, Salamanca 36885, Mexico)

  • Jesús Xamán

    (Centro Nacional de Investigación y Desarrollo Tecnológico, CENIDET-TecNM, Cuernavaca 62490, Mexico)

  • Karla M. Aguilar-Castro

    (División Académica de Ingeniería y Arquitectura, Universidad Juárez Autónoma de Tabasco, Cunduacán 86690, Mexico)

  • Edgar V. Macías-Melo

    (División Académica de Ingeniería y Arquitectura, Universidad Juárez Autónoma de Tabasco, Cunduacán 86690, Mexico)

Abstract

A study was conducted on the double diffusion by natural convection because of the effects of heat and pollutant sources placed at one third of the closed cavity’s height. The heat and pollution sources were analyzed separately and simultaneously. The study was considered for the Rayleigh number interval 10 4 ≤ R a ≤ 10 10 . Three case studies were analyzed: (1) differentially heated closed cavity with only heat sources; (2) differentially heated closed cavity with only pollutant sources; and (3) differentially heated closed cavity with heat and pollutant sources. The governing equations of the system were solved through the finite volume technique. The turbulence solution was done with the k-ε model. The dominant influence of the buoyancy forces was found due to the pollutant diffusion on the flow pattern, and an internal temperature increase was observed with the simple diffusion. The most critical case was obtained through the double diffusive convection with an average temperature value of 32.57 °C. Finally, the Nusselt number increased as the Rayleigh number increased; however, the Sherwood number either increased or decreased when the Rayleigh number increased. The highest mean concentration recorded was 2808 ppm; this was found with the value R a = 10 6 .

Suggested Citation

  • Juan Serrano-Arellano & Juan M. Belman-Flores & Jesús Xamán & Karla M. Aguilar-Castro & Edgar V. Macías-Melo, 2020. "Numerical Study of the Double Diffusion Natural Convection inside a Closed Cavity with Heat and Pollutant Sources Placed near the Bottom Wall," Energies, MDPI, vol. 13(12), pages 1-17, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:12:p:3085-:d:371736
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    References listed on IDEAS

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    1. Chen, Sheng & Du, Rui, 2011. "Entropy generation of turbulent double-diffusive natural convection in a rectangle cavity," Energy, Elsevier, vol. 36(3), pages 1721-1734.
    2. Miroshnichenko, Igor V. & Sheremet, Mikhail A., 2018. "Radiation effect on conjugate turbulent natural convection in a cavity with a discrete heater," Applied Mathematics and Computation, Elsevier, vol. 321(C), pages 358-371.
    3. Kefayati, GH.R., 2019. "Lattice Boltzmann method for natural convection of a Bingham fluid in a porous cavity," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 521(C), pages 146-172.
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