Effect of Molecular Interactions between the Solid Wall and Liquid on the Flow Properties in Microtubes
BAO Fu-Bing1,2, LIN Jian-Zhong1,2
1College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 3100182State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027
Effect of Molecular Interactions between the Solid Wall and Liquid on the Flow Properties in Microtubes
BAO Fu-Bing1,2, LIN Jian-Zhong1,2
1College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 3100182State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027
摘要The flow properties in microtubes, such as velocity profiles and pressure distributions, are different from those in macrotubes. We attribute this phenomenon to the molecular interactions between the solid wall and inner liquid. The apparent viscosity, which takes into consideration the molecular interactions, is introduced in the present study and the Navier-Stokes equations are solved. Water is adopted in the calculation. For the hydrophilic material wall, the water is more like to adhere to the wall. The velocity near the wall is smaller than that of conventional theory, while the centerline velocity and pressure gradients are much larger. Such a phenomenon becomes much more obvious with the decrease in tube diameter.
Abstract：The flow properties in microtubes, such as velocity profiles and pressure distributions, are different from those in macrotubes. We attribute this phenomenon to the molecular interactions between the solid wall and inner liquid. The apparent viscosity, which takes into consideration the molecular interactions, is introduced in the present study and the Navier-Stokes equations are solved. Water is adopted in the calculation. For the hydrophilic material wall, the water is more like to adhere to the wall. The velocity near the wall is smaller than that of conventional theory, while the centerline velocity and pressure gradients are much larger. Such a phenomenon becomes much more obvious with the decrease in tube diameter.
BAO Fu-Bing;LIN Jian-Zhong;. Effect of Molecular Interactions between the Solid Wall and Liquid on the Flow Properties in Microtubes[J]. 中国物理快报, 2009, 26(5): 56802-056802.
BAO Fu-Bing, LIN Jian-Zhong,. Effect of Molecular Interactions between the Solid Wall and Liquid on the Flow Properties in Microtubes. Chin. Phys. Lett., 2009, 26(5): 56802-056802.
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2009, Vol. 26 
