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Journal of Enhanced Heat Transfer
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ISSN Imprimer: 1065-5131
ISSN En ligne: 1563-5074

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v11.i2.20
pages 119-132

Bionic Optimization of Heat Transport Paths for Heat Conduction Problems

Zai-Zhong Xia
Department of Engineering Mechanics, Tsinghua University, Beijing, 100084, China
Xin-Guang Cheng
Department of Engineering Mechanics, Tsinghua University, Beijing, 100084, China
Zhi-Xin Li
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education School of Aerospace, Tsinghua University
Zeng-Yuan Guo
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Haidian District, Beijing 100084, China
Professor Guo was born on 28 February 1936 in Jiangsu Province, China. He graduated from Tsinghua University in 1959. He has worked in Tsinghua University, Beijing, China ever since, a tenure of over 50 years. Professor Guo’s research has been mainly concerned with thermofluid mechanics, micro/nanoscale heat transfer, thermal system optimization and efficient thermal transport. He developed the concepts of thermal drag, thermal drive, thermal displacement, and thermal instability which were presented in his keynote lectures at the 8th and 9th International Heat Transfer Conferences and in a chapter on "Thermally Induced Effects on Fluid Flow" in the Annual Review of Heat Transfer, vol. 5, 1994. Professor Guo’s research is also related to the Microscale and nanoscale heat transfer. In his keynote lecture at the International Conference on Transport Phenomena at Microscale in Canada in 2000 and at the 12th International Heat Transfer Conferences in France in 2002, Professor Guo first revealed that the microscale heat transfer size effect on the flow and heat transfer correlations is attributed to the variation of the dominant factors, such as the flow compressibility, surface roughness, and axial conduction in the tube wall, as the scale decreases even though the continuum assumption is still applicable. He was awarded the ICMM 2005 Lifetime Contribution Award in the field of Heat and Mass Transfer due to his pioneering contributions through original research related to micro/nanoscale heat transfer. In the last decade, Professor Guo has mainly focused his research of effective utilization of thermal energy. He proposed the field synergy principle for the optimization of convective heat transfer and introduced the physical quantity "entransy" to represent the physical nature of the field synergy principle, by analogy between thermal and electrical transport. The dissipation of entransy can be used to define the efficiencies of heat transfer processes and to establish the extremum principle of entransy dissipation for heat transfer optimization because it represents the irreversibility of heat transfer not related to heat-work conversions. In recent years, Professor Guo has focused his interest on the nature of heat. He proposed the Thermomass theory, using Einstein’s mass-energy relevance and proposed a general heat conduction law that includes various heat conduction models, such as the Fourier model and C-V model as special cases.

RÉSUMÉ

A fundamental problem of heat conduction optimization, the design of the most effective heat transport path using a given volume of high conductivity material, was studied in this article. Analogous to natural selection, bionic optimization is developed to construct the optimal constructs of the high conductivity material. In the numerical simulation, the high conductivity material was treated as being alive, growing at the location with maximum temperature gradient. Then, the bionic optimization is effectively used to construct the heat transport paths for a square bar and volume-to-point problem with uniform or nonuniform heat sources.