方案摘要
方案下载应用领域 | 其他 |
检测样本 | 其他 |
检测项目 | |
参考标准 | 暂无 |
利用德国LaVision公司的LIF分析软件平台DaVis对一种利用Taylor-Dean流体的微型混合器进行了纵横比和流动状态对混合效果的影响的研究。
Chaotic mixing in three different types of curved-rectangular channels flow has been studied experimentally
and numerically. Two walls of the channel (inner and top walls) rotate around the
center of curvature and a pressure gradient are imposed in the direction toward the exit of the
channel. This flow is a kind of Taylor-Dean flow. There are two parameters dominating the flow,
the Dean number De (∝ the pressure gradient or the Reynolds number) and the Taylor number Tr
(∝ the angular velocity of the wall rotation). In this paper, we analyze the physical mechanism of
chaotic mixing in the Taylor-Dean flow by comparing experimental results and numerical ones.
We produced three micromixer models of the curved channel, several centimeters long, with rectangular
cross-section of a few millimeters side. The secondary flow is measured using laser induced
fluorescence (LIF) method to examine secondary flow characteristics. Also we performed
three-dimensional numerical simulations with the open source CFD solver, OpenFOAM, for the
same configuration as the experimental system to study the mechanism of chaotic mixing. It is
found that good mixing performance is obtained in the case of De ≤ 0.1 Tr, and it becomes more
remarkable when the aspect ratio tends to large. And it is found that the mixing efficiency changes
according to the aspect ratio and inflow condition.
在一个双稳湍流涡旋火焰中,对间歇性动态的时间-频率定位
Particle-laden Taylor-Couette流:高阶转变和径向局部波浪涡旋的证据
7根杆束的流体-结构相互作用:用实验数据对比数值模拟
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