Heat transfer enhancement in Rayleigh-Benard convection using a single passive barrier

Shuang Liu Tsinghua University Sander G. Huisman University of Twente

Fluid Dynamics and Shock Waves mathscidoc:2205.14008

Physical Review Fluids, 5, 2020.12
In this numerical study on Rayleigh-Benard convection, we seek to improve the heat transfer by passive means. To this end we introduce a single tilted conductive barrier centered in an aspect ratio one cell, breaking the symmetry of the geometry and to channel the ascending hot and descending cold plumes. We study the global and local heat transfer and the flow organization for Rayleigh numbers 10(5) <= Ra <= 10(9) for a fixed Prandtl number of Pr = 4.3. We find that the global heat transfer can be enhanced up to 18%, and locally around 800%. The averaged Reynolds number is always decreased when a barrier is introduced, even for those cases where the global heat transfer is increased. We map the entire parameter space spanned by the orientation and the size of a single barrier for Ra = 10(8).
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@inproceedings{shuang2020heat,
  title={Heat transfer enhancement in Rayleigh-Benard convection using a single passive barrier},
  author={Shuang Liu, and Sander G. Huisman},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220517143735737663224},
  booktitle={Physical Review Fluids},
  volume={5},
  year={2020},
}
Shuang Liu, and Sander G. Huisman. Heat transfer enhancement in Rayleigh-Benard convection using a single passive barrier. 2020. Vol. 5. In Physical Review Fluids. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220517143735737663224.
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