I³MS - Hu Seminar
Prof. Ruo Li, Ph.D. - From Discrete Velocity Models to Moment Methods in Kinetic Gas Theory
School of Mathematical Sciences, Peking University
Rapid progress in synthesis and processing of nanomaterials has created a pressing demand for greater scientific understanding of thermal transport at the nanoscale. Employing the related interweaving surface/interface and confinement phenomena, two key research paradigms of importance to energy conversion and transport will be discussed in this talk. On the one hand, owing to miniaturization and nanostructuring, heat conduction can be significantly hindered in a controlled manner so that materials with very low thermal conductivity can be nanofabricated, which can be beneficial for energy conversion applications, e.g. in high efficiency thermoelectrics. On the other hand, interfacial thermal transport can be improved by phonon manipulation such that low interfacial thermal resistance can be realized in electronics to enhance heat dissipation in thermal management. In this seminar I will focus on my presentation on thermal transport of thermoelectric materials (energy conversion). In particular, I will propose some novel concepts of material nanostructuring to significantly enhance their ZT coefficient. These results exemplify opportunities and challenges of nanoengineering in nanoscale thermal transport and provide a new perspective to innovative energy conversion.