報告題目：Thermal metamaterials and heat transfer in moving medium
報 告 人：Dr. Ying Li（新加坡國立大學）
It is well known that the motion of matter has a dragging effect on the transportation of physical fields including electromagnetic wave, acoustic wave, and diffusion, because of the convective effects of the velocity field. Thermal convection is a common phenomenon that has been studied for a long time, but its utilization is limited to conventional cooling purposes. Here, we introduce the progresses of thermal metamaterials in recent years, and some novel approaches to extend the field into thermal convection. We report three kinds of systems that suppress the dragging effect of moving medium. Inspired by the recent developments in photonics and other novel wave materials, we propose physical models in analogue of zero-index photnonics, preserving anti-parity-time symmetry, or based on nonreciprocal considerations. Our theories can describe and well predict the behaviors of the systems at high and low moving speeds, as confirmed by simulations and experiments. The results indicate new directions of researches on heat transfer with deeper understanding and promising applications.
李鷹，新加坡國立大學電子與計算機工程系博士后研究員。2011年獲得復旦大學力學與工程科學系（現航空航天系）理學學士學位，2016年獲得復旦大學航空航天系流體力學博士學位。以第一作者身份在 Science, Nature Materials, Nature Communications, Physical Review Letters, Light: Science & Applications等期刊發表論文。主要研究興趣包括：材料及復雜結構的傳熱性能研究與智能調控，非厄密物理在熱輸運、光機械系統、無線傳能等領域的應用，紅外熱輻射調控及反偵察，對流傳熱調控、熱電材料的傳熱性質及其溫度調控等。