Department of Mechanical and Aerospace EngineeringNEWS & EVENTS
MECH6090L PG SEMINAR

Recent results in nanoscale heat transfer and energy conversion
Professor Nuo YANG
School of Energy and Power Engineering, Huazhong University of Science and Technology (HUST), Wuhan, China
Date  :  21 Apr 2017 (Fri)
Time  :  4:30- 5:20p.m.
Venue  :  Room 1104, HKUST (1/F., Lift #19)

Abstract

In the past decades, rapid developments in synthesis and processing of nanoscale materials have created a great demand for understanding of thermal transport in low dimensional nanomaterials. I will introduce three recently works as:

We proposed an instantaneously adjustable thermal resistor based on folded graphene [Nanoscale, 2016, 8, 14943]. The phonon-folding scattering effect and the dependence of thermal resistivity on the lengths of graphene were explored in theoretical analysis and simulations.

The two-temperature model (TTM) has been successfully applied to investigate the electron-phonon coupling in nonequilibrium [Phys. Rev. B 93 125432 (2016)]. We extend the TTM to describe phonon-phonon coupling between different phonon groups and use graphene as a sample material [arXiv:1702.05237]. Our results can explain theoretically not only the lower thermal conductivity of graphene-based composites [Nano Lett. 16 6 (2016)], but the measured different temperature of phonon modes [Nano Lett. 2017, 17, 2049].

Solar energy is an important renewable resource, which can be used in generating steam. We proposed a low cost high efficiency solar steam generator by graphite microparticles [arXiv:1702.05232]. Based on the heat localization, a wick material was used to transport the water from the bulk water to the evaporating surface. The energy efficiency is up to 79%. Both of the graphite particle concentration and size affect the efficiency.

Short Bio

Dr. Nuo YANG obtained Bachelor of Science at University of Science and Technology of China (USTC) in 2000 and Master of Engineering at Chinese Academy of Science (CAS) in 2003. He obtained Ph.D. in department of physics at National University of Singapore (NUS) in 2010. Then, he did postdoctoral training at NUS and Massachusetts Institute of Technology. From Jan. 2012 to Dec. 2014, he worked at School of Physical Science and Engineering, Tongji University as a Research Professor. From Jan. 2014 to now, he worked at School of Energy and Power Engineering, Huazhong University of Science and Technology (HUST) as a Professor. (Homepage is http://nanoheat.energy.hust.edu.cn/ )

His research interests mainly but not limited to theories, simulations and measurement of heat transfer by electrons and phonons. Besides, he has special interests in energy conversions, thermal managements in nanomaterials, the heat transfer mechanisms in nanostructures or across the interfacial structures, and solar desalination by nanotechnology.

He was awarded as the Chutian distinguished Professor by the education department of Hubei province in 2016, Invitation Fellowship by Japan Society for the Promotion of Science (JSPS) in 2016, and the Pujiang scholars by Shanghai committee of science and technology in 2013. Till now, he published around 50 academic papers on journals, such as Nano Lett., Nano Today (R), Small, Nanoscale, Phys. Rev. B (R), Appl. Phys. Lett. , Ren. Sust. Ener. Rev., Appl. Ener., Sci. Rep. etc., which was cited by others over 663 (WOS).




Professor Nuo YANG