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The shape oscillations of a two-dimensional drop including viscous effects

机译:包含粘性效应的二维液滴的形状振荡

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摘要

The implementation of a boundary integral method for potential flow is presented for the case of a two-dimension drop freely oscillating in a vacuum. Calculations using a standard boundary integral formulation and a double-layer potential boundary integral formulation are compared for the case of an inviscid drop with a clean interface. Additional comparison are mad easing a least-esquires spectral transform method for interpolating and differentiating versus more common methods using cubic splines and central differences. The boundary integral method for potential (i.e. inviscid) flow is extended in two viscous examples to approximate (i) the weak viscous effects in the bulk fluid far from the clean interface, or (ii) the surface viscous effects in an inviscid drop arresting from an interface that is highly contaminated with an insoluble surfactant.
机译:针对二维液滴在真空中自由振荡的情况,提出了一种边界流方法的实现方案。比较了使用标准边界积分公式和双层势边界积分公式进行的计算,可得出具有干净界面的无粘性液滴的情况。额外的比较疯狂地简化了最小要求的频谱变换方法,以进行内插和微分,而使用三次样条和中心差的方法则更为常见。潜在(即无粘性)流动的边界积分方法在两个粘性示例中得到了扩展,以近似(i)远离清洁界面的散装流体中的弱粘性效应,或(ii)从被不溶性表面活性剂高度污染的界面。

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