Volume 9,
Numéro 1&2, 2002,
20 pages
DOI: 10.1615/HeatExchDesignUpd.v9.i1-2.20
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Gian Piero Celata
ENEA, Institute of Thermal Fluid Dynamics, ENEA TERM/ISP Heat Transfer Laboratory C.R.E.
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.
Zhi-Xin Li
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education School of Aerospace, Tsinghua University; Department of Engineerig Mechanics, Tsinghua University, Beijing 100084, China
Giuseppe Zummo
ENEA, Institute for Thermal Fluid Dynamics, via Anguillarese, 301, Rome, Italy