Accelerated Particle Separation in a DLD Device at Re > 1 Investigated by Means of µPIV
Accelerated Particle Separation in a DLD Device at Re > 1 Investigated by Means of µPIV
复制标题
通过 µPIV 研究 Re > 1 时 DLD 设备中的加速颗粒分离
作者：
J. Kottmeier;M. Wullenweber;S. Blahout;J. Hussong;I. Kampen;A. Kwade;A. Dietzel
设计了一种耐压且光学可访问的确定性横向位移（DLD）装置，并由硅和玻璃微制造，用于3.0和7.0 μm之间的颗粒的高通量分级，其包括具有5 μm的柱尺寸的不同倾斜角的阵列段。该设计由使用OpenFOAM软件的计算流体动力学（CFD）模拟支持。模拟表明，在较高的雷诺数下，分馏的临界颗粒直径会发生变化。这在DLD装置中通过微粒图像测速法（µPIV）进行了实验证实，示踪粒子为0.86 µm。当雷诺数大于8时，可以观察到柱之间的非对称流场图案。此外，新的DLD装置允许在Re = 0.5-25下成功分离2 μm和5 μm的荧光聚苯乙烯颗粒。
A pressure resistant and optically accessible deterministic lateral displacement (DLD) device was designed and microfabricated from silicon and glass for high-throughput fractionation of particles between 3.0 and 7.0 µm comprising array segments of varying tilt angles with a post size of 5 µm. The design was supported by computational fluid dynamic (CFD) simulations using OpenFOAM software. Simulations indicated a change in the critical particle diameter for fractionation at higher Reynolds numbers. This was experimentally confirmed by microparticle image velocimetry (µPIV) in the DLD device with tracer particles of 0.86 µm. At Reynolds numbers above 8 an asymmetric flow field pattern between posts could be observed. Furthermore, the new DLD device allowed successful fractionation of 2 µm and 5 µm fluorescent polystyrene particles at Re = 0.5–25.
影响因子：
2.8
作者：
Dincau, Brian M.;Aghilinejad, Arian;Kim, Jong-Hoon
通讯作者：
Kim, Jong-Hoon