Mixing Enhancement in Serpentine Micromixers with a Non-Rectangular Cross-Section.
Mixing Enhancement in Serpentine Micromixers with a Non-Rectangular Cross-Section.
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DOI：
10.3390/mi9030107
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发表时间：
2018-03-02
期刊：
影响因子：
3.4
通讯作者：
Fodor PS
中科院分区：
文献类型：
--
作者：
Clark J;Kaufman M;Fodor PS
在这项数值研究中，一种新型的蛇形微混合器，包括混合单元与非矩形截面进行了研究。与其他蛇形/螺旋形微混合器类似，该设计利用了压力驱动系统中横向涡流（迪恩流）的形成，该横向涡流与流体在其被限制为沿沿着弯曲几何形状移动时所经受的离心力相关联。然而，与其他先前的设计相比，利用在混合单元之间改变取向的非矩形横截面来控制所形成的横向流的旋转中心。因此，在混合段之间形成的相关拉伸流补充了现有的旋转流，导致更复杂的流体运动。流体的流动特性和相关的混合数值计算解的Navier-Stokes方程和浓度扩散方程。结果发现，所研究的混合器的性能超过了简单的蛇形通道具有更一致的行为在低和高雷诺数。使用熵混合指数的混合质量的分析表明，最大的混合可以实现在雷诺数小至20在少于四个蛇形混合单元。
In this numerical study, a new type of serpentine micromixer involving mixing units with a non-rectangular cross-section is investigated. Similar to other serpentine/spiral shaped micromixers, the design exploits the formation of transversal vortices (Dean flows) in pressure-driven systems, associated with the centrifugal forces experienced by the fluid as it is confined to move along curved geometries. In contrast with other previous designs, though, the use of non-rectangular cross-sections that change orientation between mixing units is exploited to control the center of rotation of the transversal flows formed. The associated extensional flows that thus develop between the mixing segments complement the existent rotational flows, leading to a more complex fluid motion. The fluid flow characteristics and associated mixing are determined numerically from computational solutions to Navier–Stokes equations and the concentration-diffusion equation. It is found that the performance of the investigated mixers exceeds that of simple serpentine channels with a more consistent behavior at low and high Reynolds numbers. An analysis of the mixing quality using an entropic mixing index indicates that maximum mixing can be achieved at Reynolds numbers as small as 20 in less than four serpentine mixing units.
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影响因子：
1
作者：
Fodor, P. S.;Itomlenskis, M.;Kaufman, M.
通讯作者：
Kaufman, M.
影响因子：
1.4
作者：
Camesasca, Marco;Kaufman, Miron;Manas-Zloczower, Ica
通讯作者：
Manas-Zloczower, Ica
影响因子：
2
作者：
Cook, Kristina J.;Fan, YanFeng;Hassan, Ibrahim
通讯作者：
Hassan, Ibrahim
DOI：
10.1007/978-1-62703-134-9_20
发表时间：
2013
期刊：
Methods in molecular biology (Clifton, N.J.)
影响因子：
--
作者：
Jayamohan H;Sant HJ;Gale BK
通讯作者：
Gale BK
影响因子：
3.4
作者：
Javaid MU;Cheema TA;Park CW
通讯作者：
Park CW