Modeling of velocity distribution among microchannels with triangle manifolds
Modeling of velocity distribution among microchannels with triangle manifolds
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DOI：
10.1002/aic.11817
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发表时间：
2009-08
期刊：
影响因子：
3.7
通讯作者：
Minqiang Pan;Yong Tang;Hao Yu;Hongqing Chen
中科院分区：
文献类型：
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作者：
Minqiang Pan;Yong Tang;Hao Yu;Hongqing Chen
提出了具有三角形流形的微通道之间的速度分布模型。根据Fluent分析的流动行为，将流形划分为多个近似矩形通道，然后建立等效简化阻力网络模型，建立微通道和近似矩形通道内的速度和压降之间的关系。速度分布在两种情况下计算，分别考虑和忽略奇异损失。将本研究的结果与 Fluent 的模拟结果进行比较，以分析奇异损耗对速度分布的影响。这表明该模型适用于低雷诺数下钝角或直角三角形流形微通道间的速度分布计算。忽略奇异损失的前提是每个流动回路中的摩擦压降比奇异压降大三倍。流形优化结果表明，具有直角三角形流形的微通道之间的速度分布比相应的具有钝角流形的微通道更加均匀。 © 2009 美国化学工程师学会 AIChE J，55：1969–1982，2009
A model of velocity distribution among microchannels with triangle manifolds is proposed. According to the flow behaviors analyzed by Fluent, the manifolds are divided into several approximate rectangular channels, and then an equivalent simplified resistance network model is developed to establish the relationships between the velocities and pressure drops in microchannels and approximate rectangular channels. The velocity distributions are calculated under two situations, respectively, considering and ignoring singular losses. The outcomes of the present study are compared with Fluent's simulated results to analyze the effects of singular losses on the velocity distributions. It indicates that the proposed model is suitable for the calculation of velocity distribution among microchannels with obtuse angled or right triangle manifolds under low Reynolds numbers. The premise of ignoring singular losses is that the frictional pressure drops are three times larger than the singular pressure drops in each flow loop. The manifold optimization results indicate that the velocity distribution among microchannels with right triangle manifolds is much more uniform than that of the corresponding one with obtuse angled manifolds. © 2009 American Institute of Chemical Engineers AIChE J, 55: 1969–1982, 2009