【摘要】 结合热力学和流体力学,采用COMSOL Multiphysics 4.4计算软件,对微热气泡驱动下的流体的流速场进行模拟和定量分析.结果证明,微热气泡表面具有马格兰尼效应,可以驱动流体以漩涡的方式运动,从而高效地俘获和富集微粒,这与实验现象相符.该文从理论上探究微热气泡驱动的流场性质,这对提高微流体的可操控性,促进微流控技术的发展都具有重要的意义.更多还原

【Abstract】 Combining thermodynamics and hydrodynamics,the velocity field of fluid driven by thermal microbubbles are simulated and quantitative analgzed using the Comsol Multiphysics 4. 4. The results show that the surface of thermal microbubbles existed marangoni effect,which is driving the fluid to move in the form of vortex. The vortex can effectively trap and aggregate paricles,which is consistent with the experimental phenomenon. In consequence,the properties of the fluid field driven by thermal microbubbles are studied,which is meaningful for improving the controllability of microfluid and the developing of microfluid control technique.更多还原