Abstract
We focus on colloidal liquid used as thermal transport media applied to thermal storage or heat transfer enhancement. Electro-kinetic behavior of colloidal liquid is a key for the heat transfer in these applications, especially at the interface between liquid and solid where heat transfer takes place. We develop a novel measurement technique for measuring the electro-kinetic mobility of colloidal particles particularly in the vicinity of a solid wall. The measurement is based on laser Doppler technique using evanescent waves created on the surface of a glass plate facing at colloidal test liquid. In the present paper, we report on the development of the measurement system and the latest results of the experiments including the initial measurement signals of the system using colloidal particles.
