Aerodynamic focusing of nanoparticles: II. Numerical simulation of particle motion through aerodynamic lenses
Aerodynamic focusing of nanoparticles: II. Numerical simulation of particle motion through aerodynamic lenses
复制标题
DOI：
10.1080/02786820500181950
复制
发表时间：
2005-07-01
影响因子：
5.2
通讯作者：
McMurry, PH
中科院分区：
文献类型：
--
作者：
Wang, XL;Gidwani, A;McMurry, PH
我们已经开发出一种数值模拟方法，能够准确地表征气动透镜系统的聚焦性能。采用计算流体力学（CFD）商用软件FLUENT对气体流场进行了数值模拟。使用拉格朗日方法跟踪粒子轨迹。在我们的数值模拟中成功地结合了纳米粒子的布朗运动。然后，使用该模拟工具来评估空气动力学透镜组件的性能，该空气动力学透镜组件被设计成按照论文I（Wang等人，2005）中描述的指南聚焦3 nm球形单位密度颗粒。我们的模拟显示，这种透镜组件的性能是接近什么是预测的设计准则。模拟还证明了空气动力学透镜聚焦亚30 nm球形单位密度颗粒的能力。
We have developed a numerical simulation methodology that is able to accurately characterize the focusing performance of aerodynamic lens systems. The commercial computational fluid dynamics (CFD) software FLUENT was used to simulate the gas flow field. Particle trajectories were tracked using the Lagrangian approach. Brownian motion of nanoparticles was successfully incorporated in our numerical simulations. This simulation tool was then used to evaluate the performance of an aerodynamic lens assembly that was designed to focus 3 nm spherical unit density particles following the guidelines described in Paper I ( Wang et al. 2005). Our simulations show that the performance of this lens assembly is close to what is predicted by the design guidelines. The simulations also demonstrate the ability of aerodynamic lenses to focus sub-30 nm spherical unit density particles.