Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2012-03-29
Physics
Condensed Matter
Soft Condensed Matter
35 pages, 16 figures, submitted to Phys. Fluids
Scientific paper
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.
Chakraborty Debadi
Friend James
Prakash Ravi J.
Yeo Leslie
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