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圆孔外Stokes流中球形粒子的运动*

山慧贤 严宗毅

山慧贤, 严宗毅. 圆孔外Stokes流中球形粒子的运动*[J]. 应用数学和力学, 1989, 10(9): 789-800.
引用本文: 山慧贤, 严宗毅. 圆孔外Stokes流中球形粒子的运动*[J]. 应用数学和力学, 1989, 10(9): 789-800.
Shan Hui-xian, Yan Zong-yi. The Motion of a Spherical Particle in the Stokes Flow Outside a Circular Orifice[J]. Applied Mathematics and Mechanics, 1989, 10(9): 789-800.
Citation: Shan Hui-xian, Yan Zong-yi. The Motion of a Spherical Particle in the Stokes Flow Outside a Circular Orifice[J]. Applied Mathematics and Mechanics, 1989, 10(9): 789-800.

圆孔外Stokes流中球形粒子的运动*

基金项目: * 国家自然科学基金资助项目

The Motion of a Spherical Particle in the Stokes Flow Outside a Circular Orifice

  • 摘要: 在研究悬浮液入孔问题时,粒子在孔外任意位置所受的力和力矩是所需的最基本数据.本文在严宗毅等(1987)算出的有限个离散数据的基础上.首次给出了球在圆孔外的全部十二个力和力矩系数的近似解析表达式.我们应用这些系数计算零雷诺数下球形粒子入孔时的轨道和旋转角速度,结果与现有实验数据完全一致.分析不同系数的相对重要性表明,在孔口和孔壁附近不能忽略旋转效应.在靠近孔口边缘的局部区域必须计及侧向力效应.以往的理论结果在孔口附近与实验不符,正是由于忽略了这些因素.本文还详细讨论了粒子和孔口尺寸的相对大小以及重力和浮力对于粒子运动轨道、速度分布和旋转的影响,指出用大粒子做中性悬浮实验时,对其密度的要求特别严格.本文所提供的力和力矩系数,考虑因素全面、比较准确,便于计算,为进一步研究各种涉及粒子入口的问题提供了良好的前提.
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    [3] Wang,Y.(王永安),J.Kao(高如南),S.Weinbaum and R.Pfeffer,On the inertial impaction of small particles at the entrance of a pore including hydrodynamic and molectular wall interation effects,Chem.Eng.Sci.,41(1986),2845.
    [4] Yan,Z.(严宗毅),S.Weinbaum and R.Pfeffer.On the fine structure of osmosis including three dimensional pore entrance and exit behaviour,J.Fluid Mech.,162(1986),415.
    [5] Yan.Z.(严宗毅),S.Weinbaum,G.Ganatos and R.Pfeffer,The three-dimensional hydrodynamic interaction of a finite sphere with a circular orifice at low Reynolds number,J.Fluid Mech.,174(1987),39.
    [6] Happel.J.and H.Brenner,Low Reynolds Number Hydrodynamics,2nd ed.,Noordhoff(1973).
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出版历程
  • 收稿日期:  1988-06-10
  • 刊出日期:  1989-09-15

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