Lecture

Classical Size Effects: Transport Parallel to Boundaries

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In course

ME-469: Nano-scale heat transfer

In this course we study heat transfer (and energy conversion) from a microscopic perspective. First we focus on understanding why classical laws (i.e. Fourier Law) are what they are and what are their limits of validity. Next we discuss emerging opportunit ...

Description

This lecture covers classical size effects in transport parallel to boundaries, focusing on energy transport by waves, energy conversion mechanisms, and transport regimes. It discusses the impact of kinetic energy, thermal energy storage, and thermal energy conversion. The lecture also delves into the Boltzmann equation for energy transport and the characteristics of diffuse and ballistic transport. The instructor explores the behavior of carriers in planar geometries parallel to boundaries, emphasizing electrical conduction along thin films and heat conduction along thin films. The lecture concludes with insights on transport in planar geometries perpendicular to boundaries, highlighting the importance of slow transient processes and small temperature variations within mean free paths.

Instructor

Giulia Tagliabue

Dr. Giulia Tagliabue is an Assistant Professor at the Institute of Mechanical Engineering (IGM). She obtained her B.S. and M.S degrees cum laude in Mechanical Engineering from the University of Udine in Italy. Concurrently she also obtained the diploma from the Scuola Normale Superiore of Udine. In 2015 she obtained her PhD in Mechanical Engineering from ETH Zurich with a thesis on nanophotonic design for light-to-heat and light-to-charge conversion devices. In 2015 Dr. Tagliabue was awarded the Early Mobility Fellowship from the Swiss National Science Foundation and moved to Caltech as a PostDoctoral fellow. In 2017, thanks to the award of an Advanced Mobility Fellowship, she prolonged her stay at Caltech. Here, in collaboration with the Joint Center for Artificial Photosynthesis (JCAP) she investigated coupled light, heat and charge transfer processes in nanophotonic structures and low-dimensional materials for photoelectrochemical and photovoltaic sustainable energy conversion.

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