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arXiv 2202.01631cond-mat.softphysics.comp-ph
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液-液界面附近和界面处自扩散电泳粒子的格子Boltzmann模型

A lattice Boltzmann model for self-diffusiophoretic particles near and at liquid-liquid interfaces

Lucas Palacios, Andrea Scagliarini, Ignacio Pagonabarraga

摘要:

介绍了一种新的基于多相多组分格子玻尔兹曼方法的介观计算模型,用于模拟存在液-液界面的自泳粒子。我们的模型具有完全解析的溶剂流体动力学,由于其多功能性,它可以处理多物理问题的重要方面,包括颗粒润湿性和产品在两个液相中的溶解度差异。该方法在简单的数值实验中得到了广泛的验证,其结果在理论上是可预测的,然后应用于研究界面附近和界面处捕获的活性粒子的行为。我们发现,它们的运动可以通过调整相关的控制参数,如泳动迁移率,接触角和产品的溶解度不同地转向。

英文摘要:

We introduce a novel mesoscopic computational model based on a multiphase-multicomponent lattice Boltzmann method for the simulation of self-phoretic particles in the presence of liquid-liquid interfaces. Our model features fully resolved solvent hydrodynamics and, thanks to its versatility, it can handle important aspects of the multiphysics of the problem, including particle wettability and differential solubility of the product in the two liquid phases. The method is extensively validated in simple numerical experiments, whose outcome is theoretically predictable, and then applied to the study of the behaviour of active particles next to and trapped at interfaces. We show that their motion can be variously steered by tuning relevant control parameters, such as the phoretic mobilities, the contact angle and the product solubility.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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