Lattice Boltzmann simulations of droplet formation during microchannel emulsification.
Lattice Boltzmann simulations of droplet formation during microchannel emulsification.
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DOI：
10.1016/j.jcis.2009.03.060
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发表时间：
2009-07
影响因子：
9.9
通讯作者：
Eduard van der Zwan;R. V. D. van der Sman;K. Schroën;R. Boom
中科院分区：
文献类型：
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作者：
Eduard van der Zwan;R. V. D. van der Sman;K. Schroën;R. Boom
在这项研究中，我们比较了微流体装置中的微通道液滴形成与两相格子玻尔兹曼模拟。液滴的形成被发现是定性描述的，在模拟中的液滴稍小。这是由于模拟中界面的有限厚度。该模型可以很好地预测分散流速的依赖性，同时更好地了解液滴形成过程中的内部压力和流速。这些被发现是很好地描述了简单的关系;（1）内的分散相的压力预测非常好的拉普拉斯压力，而（2）通过颈部的流速可以估计通过流量通过一个孔。这些见解简化了新的微通道器件的设计规则的发展。
In this study, we compared microchannel droplet formation in a microfluidics device with a two phase lattice Boltzmann simulation. The droplet formation was found to be qualitatively described, with a slightly smaller droplet in the simulation. This was due to the finite thickness of the interface in the simulations. Dependence on dispersed flow rate could be very nicely predicted by the model, while a better insight was obtained on the internal pressures and flow velocities during droplet formation. These were found to be well described by simple relations; (1) the pressure inside the dispersed phase was predicted very well by the Laplace pressure while (2) the flow rate through the neck could be estimated by the flow through an orifice. These insights simplify the development of design rules for new microchannel devices.