Mixing induced by a transversely oscillating circular cylinder in a straight channel
Mixing induced by a transversely oscillating circular cylinder in a straight channel
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DOI：
10.1063/1.3177001
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发表时间：
2009-07
影响因子：
4.6
通讯作者：
B. Celik;A. Beskok
中科院分区：
文献类型：
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作者：
B. Celik;A. Beskok
通过通道中横向振荡圆柱的流动可以用作主动中尺度混合器，Celik等人对其运动学进行了研究。[“通过带有上游分流板的通道中振荡圆柱的流动，”物理学。[j] .流体力学与工程学报，2009,32(4):444 - 444。本研究对混合器内的物质输运进行了数值模拟，得到了不同圆柱激励频率下的物质输运，以及大范围Peclet数下的物质进口配置。混合指数是利用涡度场的周期性，在涡距基础上计算混合指数的新概念。混合指数对比表明，混合效率强烈依赖于壁面剪切层和涡旋核内物质的同一性。当柱体激励频率比自然涡脱落频率高25%时，相对于直道和固定柱体情况，在…
Flow past a transversely oscillating circular cylinder in a channel can be used as an active mesoscale mixer, kinematics of which was investigated by Celik et al. [“Flow past an oscillating circular cylinder in a channel with an upstream splitter plate,” Phys. Fluids 20, 103603 (2008)] at Re=100. This study presents numerical simulations of species transport in the mixer, obtained for various cylinder excitation frequencies and the species inlet configurations for a wide range of Peclet numbers. Mixing indices are calculated on the vortex spacing based mixing blocks, which is a newly introduced concept that utilizes periodicity of the vorticity field. Mixing index comparisons show that mixing efficiency is strongly dependent on the identity of the species within wall shear layers and vortex cores. For the cylinder excitation frequency of 25% higher than the natural vortex shedding frequency, 60% and 46% mixing enhancements relative to the straight channel and the stationary cylinder cases are observed at ...