【摘要】 研究了流聚焦微沟道内不同两相流速比对单分散性液滴形成的影响。不相混容的两相系统能够快速、周期性地形成液滴,液滴的形态和生成率随着油相速度的变化而改变。研究采用模拟软件COMSOL Mutiphysics,模拟了不同流速下液滴的形成过程,并通过实验进行了验证,从流体动力学的角度解释了其物理机制。所得结论为在流聚焦微沟道内获得分散性良好且大小可控的液滴提供了理论和数据支持。更多还原

【Abstract】 Micro flow-focusing devices with different flow rate conditions are studied in order to produce highly monodisperse droplets. With rapid and periodic breaking-up of the focused disperse phase in two immiscible phase system, the dependence of droplet size and generation rate on the flow rate ratio of two phases are evaluated. Using COMSOL Multiphysics, our work focused on simulating the two phase flows at different flow rates, and the results validated experiments and guided device design. Physical explanation is also proposed based on the Fluid dynamics. Thereby it provides a important reference to generate highly monodisperse and size-controllable droplets in microfluidic devices.更多还原