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International Heat Transfer Conference 13

ISBN Imprimer: 1-56700-226-9 (CD)
ISBN En ligne: 1-56700-225-0


DOI: 10.1615/IHTC13.p30.200
page 18

Koichi Hishida
Department of System Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522


The concurrent development and application of optical measurement techniques, such as Particle Image Velocimetry (PIV) and Laser-Induced Fluorescence (LIF), for single and two-phase convective flow phenomena has occupied the interest of the author for nearly 20 years. This manuscript and the accompanying lecture provide an overview of combined measurements of velocity and temperature, and thus the local convective heat flux, in both the space and time domains. For two-phase bubbly flow, the author and co-workers developed a high-speed PIV system with phase discrimination via shadow imaging (of the dispersed phase) and fluorescent tracer particle in the continuous phase. These techniques provide multi-scale, time- and space information such that the heat and momentum transfer processes in convective single/two-phase flow systems are elucidated.
The author intends to summarize efforts in the following areas, classified as follows: i) and ii) for single phase flow, iii) and iv) for two-phase flow:
i) Combined planar-LIF and PIV techniques for velocity and temperature fields in thermally-stratified flow, impinging jet flow and convective mixing in a microchannel.
ii) Three-dimensional CT techniques for concentration/temperature measurements in the mixing process of a starting jet, and temperature distribution of heated jet.
iii) PIV, in conjunction with a shadow image technique for turbulent bubbly flow: turbulent kinetic energy transport in upward pipe flow, and turbulent modification in microbubble channel flow.
iv) Interferometric Laser Imaging (ILI) for measurement of droplet/bubble size of transient spray and microbubble plumes.

IHTC-13 Digital Library

Measurement of fluid temperature with an arrangement of three thermocouples FLOW BOILING OF A HIGHLY VISCOUS POLYMER SOLUTION