• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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Volume 19 Issue 2
Apr.  2006
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Article Contents
WANG Weidong, JIA Jianyuan. Damping Characteristics of Microfluid on Perforated Disks with a Centre Hole[J]. Journal of Southwest Jiaotong University, 2006, 19(2): 218-222.
Citation: WANG Weidong, JIA Jianyuan. Damping Characteristics of Microfluid on Perforated Disks with a Centre Hole[J]. Journal of Southwest Jiaotong University, 2006, 19(2): 218-222.

Damping Characteristics of Microfluid on Perforated Disks with a Centre Hole

  • Received Date: 12 Jun 2005
  • Publish Date: 25 Apr 2006
  • Based on the equations of gap flow and squeezed flow,the viscous-modified solution under the slip boundary condition was obtained to calculate the damping characteristic of microfluid acting on a perforated disk with a centre hole.The correlation between the kinetic damping and dimensions of the perforated disk,such as the gap and the radius of the centre hole and the thickness of the disk,was obtained.An analytical expression of damping composed of slide film damping and squeeze film damping was presented.It was found that the damping of microfluid acting on the disk is correlative with surface characteristics of the disk.Suitable equivalent viscosity can be obtained by introducing a momentum accommodation coefficient to calculate the damping forces of microfluid acting on moving objects.A calculation example shows that the analytical solutions accord well with the numerical results obtained with finite element method.

     

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