3月 18（水） 16:00～

発表者

義永　那津人 (所属：東京大学)

題目

Thermophoresis and induced flow near surface under temperature gradient

概要

 
Thermophoresis, also known as the Soret effect, is phenomenon that
particles spontaneously move under temperature gradient. This, together
with similar phenomena of electrophoresis and diffusiophoresis, attracts
growing interest of manipulating and transporting particles to
destinations in microfluidics.
It has been discussed that the flow near a particle results in force
acting on a particle in this phenomenon; this implies that surface
properties play crucial roles. Despite of intensive past studies,
microscopic pictures of correlation between surface properties and
induced flow are still controversial.
In this presentation, I will present recent studies of thermophoresis.
In particular, the results of Molecular Dynamics simulations of fluids
between two walls under a gradient of temperature are shown. We found
that there is indeed flow near walls depending on interactions between
solvents and walls, and both magnitude and direction of force acting on
the walls are accordingly dependent on them. Furthermore, I shall
discuss the mechanism of thermophoresis and potential applications to
control direction of motion.

      

場所

京都大学 基礎物理学研究所 研究棟・講義室K206

地図 (Map)