Paper Title:
A Numerical Investigation of a Capacitive Viscometer with Fluid-Structure Interaction Using Equivalent Modeling
  Abstract

This paper performs a numerical investigation of a micro-electro-mechanical-system (MEMS) based capacitive viscometer. The viscometer includes a pre-stressed membrane interacted with a trapped air and a polymer solution, as well as a semi-permeable membrane that allows water and small molecular to pass through freely. A very simple modeling method is presented to solve the complicated problem. First, the fluid property of the polymer solution is estimated using relaxation time estimation. Second, a two modes vibration assumption of the pre-stressed membrane is proved using structure-air-interaction. Then the leakage through the semi-permeable membrane is also estimated using the volume flow with lubrication theory. Finally, the equivalent model of the glucose sensor is built using very simple vibration equations, the capacitance is also calculated. The simulation results show that the trapped air plays a significant role for the vibration of membrane, the volume should be large enough to reduce the nonlinear effects caused by the trapped air, which unfortunately causes the capacitance much to be smaller.

  Info
Periodical
Advanced Materials Research (Volumes 311-313)
Chapter
Other Related Topics
Edited by
Zhongning Guo
Pages
2423-2429
DOI
10.4028/www.scientific.net/AMR.311-313.2423
Citation
Z. J. Yang, R. Kelly, X. Chen, "A Numerical Investigation of a Capacitive Viscometer with Fluid-Structure Interaction Using Equivalent Modeling", Advanced Materials Research, Vols. 311-313, pp. 2423-2429, 2011
Online since
August 2011
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Price
$32.00
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