Abstract.

We numerically investigate the influence of interfacial deformations on the drag force exerted on a particle straddling a fluid interface. We perform finite element simulations of the two-phase flow system in a bounded two-dimensional geometry. The fluid interface is modeled with a phase-field method which is coupled to the Navier-Stokes equations to solve for the flow dynamics. The interfacial deformations are caused by the buoyant weight of the particle, which results in curved menisci. We compute drag coefficients as a function of the three-phase contact angle, the viscosity ratio of the two fluids, and the particle density. Our results show that, for some parameter values, large drag forces are not necessarily correlated with large interfacial distortions and that a lower drag may actually be achieved with non-flat interfaces rather than with unperturbed ones.

Graphical abstract

中文翻译：

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跨越流体界面的粒子上的阻力：界面变形的影响。

摘要。

我们用数值方法研究了界面变形对跨过流体界面的颗粒所施加的阻力的影响。我们在有界二维几何体中对两相流系统进行有限元模拟。使用相场方法对流体界面进行建模，该方法与Navier-Stokes方程耦合以求解流动动力学。界面变形是由颗粒的浮重引起的，这导致弯曲的半月板。我们将阻力系数计算为三相接触角，两种流体的粘度比和颗粒密度的函数。我们的结果表明，对于某些参数值，

图形概要