Numerical Simulation of Hydrophobic Spheres Entering Water at Low Weber Numbers

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Numerical Simulation of Hydrophobic Spheres Entering Water at Low Weber Numbers

更新时间：2025-07-09

- Numerical Simulation of Hydrophobic Spheres Entering Water at Low Weber Numbers
- Vol. 46, Issue 11, Pages: 40-43(2012)
- 作者机构：
  
  西安交通大学热流科学与工程教育部重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： O353.4
- Online First：10 November 2012，
  
  Published：2012
- 稿件说明：
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Numerical Simulation of Hydrophobic Spheres Entering Water at Low Weber Numbers[J]. 2012, 46(11): 40-43.
DOI：

Numerical Simulation of Hydrophobic Spheres Entering Water at Low Weber Numbers[J]. 2012, 46(11): 40-43. DOI：

摘要

为了能准确预测壁面湿润性对固体入水的影响

使用二维轴对称模型和动网格技术模拟了疏水小球低速竖直入水实验

使用用户自定义函数(UDF)加入动态接触角模型来处理壁面湿润性.气液界面的捕捉采用流体体积(VOF)法

界面重构应用Compressive方法.首先模拟了小密度超疏水小球入水实验以验证小球受力计算的准确性

然后针对3种不同空泡类型实验进行数值模拟

模拟结果与实验符合较好

并数值分析了入水初速度的改变对入水过程的影响

对于shallow seal空泡

无量纲闭合时间与韦伯数可用二次曲线精确拟合.

Abstract

In order to analyze the influence of the wetting property on the water entry

a numerical simulation on the vertical water entry of small hydrophobic spheres at low impact speed was performed using the 2D axisymmetric grid and the dynamic mesh model. The dynamic contact angle model with UDFs was applied to handle the wetting property. In the numerical simulation

the VOF method and the compressive scheme were used to track and reconstruct the interfaces

respectively. The accuracy of the force calculation method was validated in the simulation by using a light superhydrophobic sphere. The simulation results for different cavity types agree reasonably with the experimental data. The influence of the impact speed was analyzed based on simulation results. For the shallow seal cavity

the dimensionless pinch-off time could be fitted well by the quadratic functions with an increase in the impact speed.

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references

WORTHINGTON A M, COLE R S. Impact with a liquid surface, studied by the aid of instantaneous photography[J]. Phil Trans R Soc Lond, 1897, 189(A): 137-148.

MAY A. Vertical entry of missiles into water[J]. Journal of Applied Physics, 1952, 23(12): 1362-1372.

DUCLAUX V, CAILLE F, DUEZ C, et al. Dynamics of transient cavities[J]. Journal of Fluid Mechanics, 2007, 591: 1-19.

ARISTOFF J M, BUSH J W M. Water entry of small hydrophobic spheres[J]. Journal of Fluid Mechanics, 2009, 619: 45-78.

YAN H M, LIU Y M, KOMINIARCZUK J, et al. Cavity dynamics in water entry at low Froude numbers[J]. Journal of Fluid Mechanics, 2009, 641: 441-461.

DO-QUANG M, ANBERG G. The splash of a solid sphere impacting on a liquid surface: numerical simulation of the influence of wetting[J]. Physics of Fluids, 2009, 21(2): 022102.

LEE D G, KIM H Y. Impact of a superhydrophobic sphere onto water[J]. Langmuir, 2008, 24(1): 142-145.

BRACKBILL J U, KOTHE D B, ZEMACH C. A continuum method for modeling surface-tension[J]. Journal of Computational Physics, 1992, 100(2): 335-354.

SAHA A A, MITRA S K. Effect of dynamic contact angle in a volume of fluid(VOF)model for a microfluidic capillary flow[J]. Journal of Colloid and Interface Science, 2009, 339(2): 461-480.

JIANG T S, OH S G, SLATTERY J C. Correlation for dynamic contact angle[J]. Journal of Colloid and Interface Science, 1979, 69(1): 74-77.

SIKALO S, WILHELM H D, ROISMAN I V, et al. Dynamic contact angle of spreading droplets: experiments and simulations[J]. Physics of Fluids, 2005, 17(6): 062103.

BRACKE M. The kinetics of wetting the dynamic contact angle[J]. Progr Colloid Polym Sci, 1989, 79:142-149.

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