https://scholars.lib.ntu.edu.tw/handle/123456789/611826
標題: | Dynamics of gas bubbles in time-variant temperature fields | 作者: | Webb I.R. Arora M. Roy R.A. Payne S.J. Coussios C.-C. STEPHEN JOHN PAYNE |
關鍵字: | Bubble behaviour;Bubble dynamics;Bubble models;Bubble size;Diffusivities;Digital photography;Gas bubble;Gas solubility;Gel phantom;Numerical simulation;Physical parameters;Sizing algorithms;Temperature dependence;Temperature field;Time variant;Vapour pressures;Xanthan Gum;Behavioral research;Computer simulation;Heating;Surface tension;Tracking (position);Dynamics;algorithm;bubble;fluid dynamics;gas;numerical model;simulation;temperature gradient | 公開日期: | 2010 | 卷: | 663 | 起(迄)頁: | 209-232 | 來源出版物: | Journal of Fluid Mechanics | 摘要: | The effect of time-variant temperature on the dynamics of a single gas bubble in a liquid is investigated. With changes in temperature, several physical parameters controlling bubble behaviour change including surface tension, diffusivity, vapour pressure and gas solubility. A single-bubble model is formulated and a numerical simulation implemented to model the radius-time profile of a bubble, across a range of initial bubble sizes and rates of heating, taking into account the aforementioned parameter temperature dependences. The model is validated experimentally in a xanthan gum gel phantom, tracking the evolution of the bubbles using digital photography and an image analysis sizing algorithm. It is shown that the natural tendency for a bubble to dissolve can be reversed by an increase in temperature, but only above a certain radius-dependent threshold rate of heating. ? 2010 Cambridge University Press. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-78649976510&doi=10.1017%2fS0022112010003472&partnerID=40&md5=a411f1b5c8c828ae89ea3ffe1de4a943 https://scholars.lib.ntu.edu.tw/handle/123456789/611826 |
DOI: | 10.1017/S0022112010003472 |
顯示於: | 應用力學研究所 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。