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Numerical Simulation of the Oscillating Flow around a Droplet

机译：液滴周围振荡流动的数值模拟

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摘要

The oscillating flow filed around the droplet in an accoustic standing wave is simulated numerically. The Navier-Stokes equations are solved by the level set and the arbitraly Lagrangian-Eulerian coupled method. Instantaneous flows in the outside of the droplet is calculated and the average flow field is obtained. It is found that the acoustic streaming appears in the average flow field, though the average pressure gradient is almost zero. The average pressure in the inside of the droplet is higher than the outside pressure due to the surface tension force. The reverse flow region is found to appear on the droplet. Vorticity is shown not only in the outside of the droplet but also in the inside of the droplet near the surface .
机译：数值模拟了在声驻波中围绕液滴产生的振荡流。 Navier-Stokes方程通过水平集和任意Lagrangian-Eulerian耦合方法求解。计算液滴外部的瞬时流量，并获得平均流场。已经发现，尽管平均压力梯度几乎为零，但是声流出现在平均流场中。由于表面张力，液滴内部的平均压力高于外部压力。发现反向流动区域出现在液滴上。涡度不仅显示在液滴的外部，还显示在表面附近的液滴的内部。

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