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首页> 外文会议>4th International Conference on Nanochannels, Microchannels and Minichannels 2006(ICNMM2006) pt.A >THE EFFECT OF THE TIME DEPENDENT PRESSURE DIFFERENCE ON BUBBLE DYNAMICS IN MICROCHANNELS
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THE EFFECT OF THE TIME DEPENDENT PRESSURE DIFFERENCE ON BUBBLE DYNAMICS IN MICROCHANNELS

机译：时间相关的压差对微通道内气泡动力学的影响

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摘要

The physical processes responsible for bubble formation in microchannels are not well understood and lack fundamental understanding. Experimental results are not exactly in agreement with each other and there are no definite theories to explain the possible effects of different parameters. Among different parameters the microchannel hydraulic diameter can affect the bubble formation mechanism in microchannels strongly. In this paper the effect of the time dependent pressure difference between inside and outside of the bubble on bubble dynamics in microchannels have been investigated. The source of this time dependency can be the emergence of bubble embryos which produces a density perturbation in liquid. Results show that bubble growth rate and maximum bubble diameter in microchannels are smaller than them in ordinary size channels. These results are in good agreement with some researchers' observations, sometimes called fictitious boiling and bubble-extinction, in microchannels.
机译：导致微通道中气泡形成的物理过程尚未得到很好的理解，并且缺乏基本的理解。实验结果彼此并不完全一致，也没有确切的理论来解释不同参数的可能影响。在不同的参数中，微通道水力直径会严重影响微通道中的气泡形成机理。本文研究了气泡内部和外部之间随时间变化的压差对微通道中气泡动力学的影响。时间依赖性的来源可能是气泡胚的出现，气泡胚会在液体中产生密度扰动。结果表明，微通道中的气泡生长速率和最大气泡直径小于普通尺寸通道中的气泡生长速率和最大气泡直径。这些结果与一些研究人员在微通道中的观察结果（有时称为虚拟沸腾和消泡）非常吻合。

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