报告人：Ming Hu,Department of Mechanical Engineering, University of South Carolina, USA.
Ming Hu is currently a Professor in the Department of Mechanical Engineering at the University of South Carolina. He received his B.S. degree in mechanical engineering from University of Science and Technology of China (USTC) in 2001 and then his PhD in solid mechanics from the Institute of Mechanics, Chinese Academy of Sciences in 2006. He was a research associate at the Rensselaer Polytechnique Institute from 2006 to 2009 and then a senior research scientist at the Swiss Federal Institute of Technology from 2009 to 2013. In 2013 he joined the Faculty of Materials Engineering at the RWTH Aachen University in Germany as an Assistant Professor. He accepted his current position in the Department of Mechanical Engineering at the University of South Carolina in 2018. Dr. Hu has more than 19 years’ experience in computer modeling and simulation of thermal transport in advanced energy systems with applications in advanced thermal management and energy systems. Dr. Hu is currently leading the Advanced Materials Discovery and Simulation Laboratory focusing on developing big data and machine learning algorithms to discover and design novel materials and structures for advanced energy engineering and technology. Dr. Hu has authored and co-authored four book chapters and 148 high-impact international journal articles with more than 4,700 citations (Google scholar h-index: 39). Dr. Hu has been invited as keynote speakers and journal reviewer by more than 50 times. He is currently an editorial board member of Scientific Reports – an online multidisciplinary journal from the publishers of Nature.
In this seminar talk I will first summarize some novel physical effects in the heat conduction of nanomaterials and some hot research directions and material systems in this field in recent years. In low-dimensional systems, due to the quantum confinement effect, the quantum state of heat carriers—phonons—is very different from that of the three-dimensional material, resulting in many unique properties in its thermal conduction behavior, such as significant size effect, phonon coherence, and abnormal influence on heat conduction, etc. Compared with the study of the electronic and photonic properties of quantum materials, understanding of the properties of phonons is relatively lacking. This aspect is due to the fact that phonons are collectively excited quasiparticles, so they are more complicated. In the second part of the seminar, I will talk about some new thermal transport regimes. One of the representative cases is the partial-crystalline partial-liquid materials that are now widely used as thermoelectrics and battery electrodes, due to their low thermal conductivity and high ionic conductivity, respectively. However, the well-developed computational methods for pure crystalline materials such as anharmonic lattice dynamics coupled with Boltzmann transport equation (BTE) cannot be used to study such systems. Another example is the interaction between principal energy carriers, such as electron-phonon coupling (EPC) and phonon-photon interaction. It is highly expected that, by considering EPC in phononic and electronic BTE, the root reason for excess heat generation in micro-/nano-electronics and the heat dissipation on a larger scale can be deeply understood and then novel device-level architectures pertaining to more efficient thermal management will be designed and fabricated. The research on micro-/nano-scale heat transfer is not only of great significance for the temperature control of functional electronic devices, renewable energy, and other application fields, but also can deepen our understanding of transport phenomena and interaction among different energy carriers, and promote condensed matter physics and materials.