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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >The effect of fluid flow on the detachment of drops in the wake of a flat plate
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The effect of fluid flow on the detachment of drops in the wake of a flat plate

机译：平板尾流中流体流动对液滴分离的影响

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The pinch-off a liquid drops from the end of a flat plate has been studied. Gas flows parallel to the plate with mean velocity v, and creates a wake at the plate end. The break-up process if found to be reproducible, with the number of satellites increasing with both increasing velocity and increasing mass density. The diameter of the main drop after detachment, d, at Weber numbers exceeding 5 is found to be given byd/d(v-0) = 1 - CRep1with C=(5.6 +/- 0.3) (.) 10(-5) for ethanol and C=(2.9 +/- 0.4) (.) 10(-5) for water. The diameter in quiescent gas, d(r)=0, is easily predicted, and Re-p1 is the Reynolds number based on v and the thickness of the plate. Diameters at smaller Weber numbers are better predicted by a similar correlation in terms of the Weber number. Instantaneous acceleration and forces on a drop have been measured and analyzed. Hydrodynamic interaction between liquid and gas at high gas velocities at moments of strong interaction could be quantified with the usual expression for the drag force and a drag coefficient of about 1.3. (C) 2004 Elsevier Inc. All rights reserved.
机译：已经研究了从平板的末端捏掉液滴的方法。气体以平均速度v平行于板流动，并在板端产生尾流。如果发现分裂过程是可重复的，则卫星的数量会随着速度和质量密度的增加而增加。发现在韦伯数超过5时分离后的主滴直径d为d / d（v-0）= 1-CRep1，C =（5.6 +/- 0.3）（。）10（-5）对于乙醇，对于C ＝（2.9 +/- 0.4）（。）10（-5）。静态气体的直径d（r）= 0很容易预测，Re-p1是基于v和平板厚度的雷诺数。在韦伯数较小的情况下，通过韦伯数的相似相关性可以更好地预测直径。已测量并分析了瞬时加速度和作用在跌落上的力。可以用惯常的阻力和阻力系数约为1.3的常用表达式来量化高气体速度下在高气体速度下液体和气体之间的流体动力相互作用。 （C）2004 Elsevier Inc.保留所有权利。

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