Application of Visualization Technique to Cryogenic Thermo-fluid Mechanics Research
In this article, several visualization techniques that have been successfully used in our cryogenic thermo-physical studies will be discussed. The first is categorized into direct observation methods,which can be applied to some physical phenomena in which large difference in the refractive index appears. He Ⅱ film boiling and He Ⅱ cavitation flow through a Venturi channel that could be observed by the naked eye were recorded by a high-speed video. It will be shown that some faint phenomena can be better visualized if some image enhancement technique is used together. The second examples are the application of tracer particles by which He Ⅱ thermal counterflow jet was visualized and recorded by a still camera, or through some elaborated optical systems, such as PIV and LDV. PIV was also applied to He Ⅱ cavitation flow in which cavitation bubbles were used as tracers instead of adding solid particles. The third example is the application of the laser holography interferometer to thermal shock waves in He Ⅱ.
Murakami M
Graduate School of Systems and Information Engineering,University of Tsukuba,Tsukuba 305-8573,Japan
国际会议
上海
英文
23-33
2008-04-05（万方平台首次上网日期，不代表论文的发表时间）