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Constructal multi-scale cylinders with natural convection

Publication ,  Journal Article
Bello-Ochende, T; Bejan, A
Published in: International Journal of Heat and Mass Transfer
October 1, 2005

This paper shows that in a space filled with assemblies of cylinders cooled by natural convection the heat transfer density can be increased progressively by the use of cylinders of several sizes, and the optimal placement of each cylinder in the assembly. Smaller cylinders are placed closer to the entrance to the assembly, in the wedge-shaped flow regions occupied by fluid that has not yet been used for heat transfer. The paper reports the optimized flow architectures and performance for structures with one and two cylinder sizes, which correspond to structures with one and two degrees of freedom. The heat transfer rate density increases as the optimized structure becomes more complex. The optimized cylinder diameters are relatively robust, i.e., insensitive to changes in complexity and flow regime (Rayleigh number). The optimized spacings decrease monotonically as the Rayleigh number increases. The structure performance can be improved by endowing the cylinder assemblies with more degrees of freedom. © 2005 Elsevier Ltd. All rights reserved.

Duke Scholars

Published In

International Journal of Heat and Mass Transfer

DOI

ISSN

0017-9310

Publication Date

October 1, 2005

Volume

48

Issue

21-22

Start / End Page

4300 / 4306

Related Subject Headings

  • Mechanical Engineering & Transports
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

Citation

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ICMJE
MLA
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Bello-Ochende, T., & Bejan, A. (2005). Constructal multi-scale cylinders with natural convection. International Journal of Heat and Mass Transfer, 48(21–22), 4300–4306. https://doi.org/10.1016/j.ijheatmasstransfer.2005.05.023
Bello-Ochende, T., and A. Bejan. “Constructal multi-scale cylinders with natural convection.” International Journal of Heat and Mass Transfer 48, no. 21–22 (October 1, 2005): 4300–4306. https://doi.org/10.1016/j.ijheatmasstransfer.2005.05.023.
Bello-Ochende T, Bejan A. Constructal multi-scale cylinders with natural convection. International Journal of Heat and Mass Transfer. 2005 Oct 1;48(21–22):4300–6.
Bello-Ochende, T., and A. Bejan. “Constructal multi-scale cylinders with natural convection.” International Journal of Heat and Mass Transfer, vol. 48, no. 21–22, Oct. 2005, pp. 4300–06. Scopus, doi:10.1016/j.ijheatmasstransfer.2005.05.023.
Bello-Ochende T, Bejan A. Constructal multi-scale cylinders with natural convection. International Journal of Heat and Mass Transfer. 2005 Oct 1;48(21–22):4300–4306.
Journal cover image

Published In

International Journal of Heat and Mass Transfer

DOI

ISSN

0017-9310

Publication Date

October 1, 2005

Volume

48

Issue

21-22

Start / End Page

4300 / 4306

Related Subject Headings

  • Mechanical Engineering & Transports
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences