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Computational Fluid Dynamics for Cavity Natural Heat Convection: Numerical Analysis and Optimization in Greenhouse Application

Author

Listed:
  • Yin Zhang
  • Menglong Zhang
  • Jianwu Xiong
  • Gang Mao
  • Yicong Qi

Abstract

Natural convection in cavity plays a significant role in energy‐related field, including the indoor heat transfer analysis in greenhouse with integrated PV roof. In this study, mathematical model is established for two‐dimensional heat transfer analysis in greenhouse air cavity, with numerical simulation through computational fluid dynamics (CFD). Main natural convection impact factors, such as system configuration parameters (tilting angle and PV panel unit number) and fluid thermal–physical properties, are investigated with indoor temperature distribution and streamline comparison by finite‐volume method (FVD). Preliminary results show that with rising Rayleigh number (Ra), natural convection is enhanced with growing Nusselt number (Nu). Moreover, panel slope tilting angle (θ) highly determines inside heat transfer subregions in terms of the vertical temperature gradient declines with rising θ, improving the temperature distribution uniformity inside. The solar greenhouse example illustrates that with the increasing numbers of panel group numbers (n), the air temperature gradient differences decrease, improving the temperature distribution uniformity inside, which is preferable to built environment accurate control for greenhouse in the practical engineering. This work can provide modeling method support and reference for natural heat convection applications.

Suggested Citation

  • Yin Zhang & Menglong Zhang & Jianwu Xiong & Gang Mao & Yicong Qi, 2023. "Computational Fluid Dynamics for Cavity Natural Heat Convection: Numerical Analysis and Optimization in Greenhouse Application," Advances in Mathematical Physics, John Wiley & Sons, vol. 2023(1).
    • Handle: RePEc:wly:jnlamp:v:2023:y:2023:i:1:n:1074719
    DOI: 10.1155/2023/1074719
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    References listed on IDEAS

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