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首页> 外文期刊>The Canadian Journal of Chemical Engineering >An engineering Analysis of Transient laminar flows in long mlcrochannels
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An engineering Analysis of Transient laminar flows in long mlcrochannels

机译：长微通道中瞬态层流的工程分析

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摘要

An engineering model of a transient laminar flow from a pressurised vessel through a long microchannel under a condition of a rapid valve opening at a channel outlet is developed. A valve at the channel outlet, which is opening with a given speed, is modelled as a time-dependent boundary condition. Transient flows are investigated numerically by the method of characteristics. The calculations show that variations of pressure and velocity distributions along the channel over time, caused by a transient flow regime, decrease with a decrease in the channel diameter and the channel length, an increase in the time of valve opening and an increase in the fluid viscosity.
机译：建立了在通道出口快速打开阀门的情况下，从压力容器通过长微通道的瞬态层流的工程模型。以给定速度打开的通道出口处的阀门被建模为与时间有关的边界条件。通过特征方法对瞬态流动进行了数值研究。计算表明，由瞬态流态引起的沿通道的压力和速度分布随时间的变化随通道直径和通道长度的减小，阀打开时间的增加以及流体的增加而减小。粘度。

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