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arXiv · 1203.6427

Fluid-Structure Interaction in Deformable Microchannels

Debadi Chakraborty·J. Ravi Prakash·Leslie Yeo·James Friend
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Abstract

A microfluidic device is constructed from PDMS with a single channel having a short section that is a thin flexible membrane, in order to investigate the complex fluid-structure interaction that arises between a flowing fluid and a deformable wall. Experimental measurements of membrane deformation and pressure drop are compared with predictions of two-dimensional and three-dimensional computational models which numerically solve the equations governing the elasticity of the membrane coupled with the equations of motion for the fluid. It is shown that the two-dimensional model, which assumes a finite thickness elastic beam that is infinitely wide, approximates reasonably well the three-dimensional model, and is in excellent agreement with experimental observations of the profile of the membrane, when the width of the membrane is beyond a critical thickness, determined to be roughly twice the length of the membrane.

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Debadi Chakraborty, J. Ravi Prakash, Leslie Yeo, James Friend. 2012-03-29. Fluid-Structure Interaction in Deformable Microchannels. https://doi.org/10.1063/1.4759493

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