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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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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：在数值上模拟围绕声波液滴围绕液滴的振荡流程。 Navier-Stokes方程由水平集和仲裁拉格朗日 - 欧拉耦合方法解决。计算出液滴外部的瞬时流动，获得平均流场。发现声流出现在平均流场中，但平均压力梯度几乎为零。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。 Vorticity不仅在液滴的外侧表示，而且在表面附近的液滴内部表示。

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