首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Thermocapillary Alignment of Gas Bubbles Induced by Convective Transport
Authors:Leshansky Alexander M  Nir Avinoam
Institution:a Department of Mathematics, Technion-IIT, Haifa, 32000, Israel;b Department of Chemical Engineering, Technion-IIT, Haifa, 32000, Israel
Abstract:The effect of a weak convective heat transfer on the thermocapillary interaction of two bubbles with an arbitrary orientation relative to an externally imposed temperature gradient is examined. Asymptotic analysis of the case of large separation distances, Z, suggests that the corrections to the bubbles' velocities are of (Pe/Z2), rather than (Pe2) previously found for an isolated bubble. Equal-sized bubbles are known to move with the same velocities, as if they were isolated, when heat conduction is the only transport mechanism. However, the convective transport results in a relative motion of the bubbles. The tendency of equal bubbles to line up in a plane perpendicular to the applied thermal gradient is shown analytically in the weakly nonlinear limit of small Pe numbers, and an interesting interaction behavior in the case of unequal bubbles is discussed.
Keywords:Abbreviations: thermocapillary migrationAbbreviations: hydrodynamic interactionAbbreviations: convective transportAbbreviations: particle alignment
本文献已被 ScienceDirect PubMed 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号