关于普渡大学阮修林教授来我校访问讲学的通知
时间:2016-6-3 16:29:33   阅读:   标签: 能源学院 阮修林教授 访问讲学
应我校能源学院刘林华教授的邀请,美国普渡大学阮修林教授来我校访问讲学,欢迎感兴趣的师生踊跃参加,学术讲座题目、时间和地点安排如下:
报告题目:Engineering Thermal Radiative and Conductive Properties at the Nanoscale: A Multiscale Multiphysics Simulation Approach
报告人: Xiulin Ruan教授
时间:6月6日上午9:00-10:00
地点:动力楼545
报告内容简介
Thermal transport properties are key issues limiting many important energy transfer and conversion applications such as thermal management of electronic devices, thermoelectrics, solar thermal and photovotaics. It is desired to be able to predict such properties from their atomic structures. In this talk I will give examples of predicting thermal radiative and conductive properties of solids from their atomic structures, through multiscale multiphysics simulation tools that bridge first-principles calculations, molecular dynamics, and finite difference/element methods. The first part will cover solar thermal and photovoltaic applications using carbon nanotubes, Si nanowire, thin graphitic arrays, and dielectric materials. We predict the dielectric function using first-principles methods together with Fermi’s Golden Rule. We will discuss photon-electron interaction in the visible band and photon-phonon interaction in the far-infrared. The results are then implemented into finite difference time domain (FDTD) calculations to demonstrate the extremely high optical absorption, which is desirable for solar applications. The second part of the talk will cover several unusual findings on spectral phonon scattering and heat conduction in solids. Previous perturbation theory has been limited to evaluating three-phonon scattering rates, and here we have developed a formalism to explicitly determine four-phonon scattering rates. We find that four-phonon scattering rates are comparable to three-phonon scattering rates at medium and high temperatures, and they increase quadratically with temperature. As a consequence, the thermal conductivity of argon and silicon can be considerably reduced when four-phonon scattering is included. We also show that asymmetric graphene nanoribbons show interesting nonlinear thermal transport phenomena such as thermal rectification. Such behaviors can potentially be used to make devices that can control heat flow.
阮修林教授简介:
Dr. Xiulin Ruan is an associate professor and associate director of graduate recruitment and admissions in the School of Mechanical Engineering at Purdue University.  He received his B.S. (2000) and M.S. (2002) from the Department of Engineering Mechanics at Tsinghua University. He then received another M.S. in electrical engineering (2006) and Ph.D. in mechanical engineering (2007) from the University of Michigan at Ann Arbor, before joining Purdue.  He received the NSF CAREER Award (2012), the Air Force Summer Faculty Fellowship (2010, 2011, and 2013), the ASME Heat Transfer Division Best Paper Award (2015), Purdue College of Engineering Faculty Early Career Research Award (2016), and the Outstanding Graduate Student Mentor Award (2016), among his honors. He has been an Editorial Board member for the journal Scientific Reports since 2012. His research and teaching interests are focused on multiscale multiphysics simulations and experiments of phonon, photon, and electron transport and interactions. He has published 73 journal papers on these topics.

  

发布:金凤秋 |  审核:帅永 |  来源: 能源学院