Abstract
We report on an attempt to investigate electro kinetic behavior of the particles dispersed in colloidal liquid. Colloidal liquids are expected to be potentially useful as thermal transport media such as nanofluids and micro - /nano emulsion. In the present study, we investigate the velocities of colloidal particles influenced by different aspects of electrokinetics. We developed a measurement system for evaluating velocities of colloidal particles in the vicinity of solid glass surface. The measurement principle is based on laser Doppler method using an interference of coherent evanescent lights created at the boundary between solid glass and test colloid. In the present study, we used aqueous solution of polystyrene particles with different diameters filled in a test section. We measured the flow velocities of the particles under different magnitudes of the electric fields induced to the test liquid. The results shows a linear increase of the mobility with the induced strength of the electric field. In the final presentation, we will report on the initial investigation with a temperature controlled test section.
