Fabrication of an in-plane SU-8 cantilever with integrated strain gauge for wall shear stress measurements in fluid flows

N.J. Allen, David Wood, M.C. Rosamond, D.B. Sims-Williams, J. Brugger (Editor), D. Briand (Editor)

Research output: Contribution to journalArticlepeer-review

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Abstract

We present a cantilever fabricated from the polymer SU-8 for the measurement of wall shear stress in fluid flows. The pressure induced deflection of the cantilever, measured using a calibrated and integrated nichrome strain gauge, can be related to the wall shear stress on the surface. The initial degree of curvature of the cantilever can be controlled via the exposure dose, which allows a small positive deflection to be achieved, and so minimises the intrusion into the flow. Wind tunnel testing results show a sensitivity greater than 2.5 mV/Pa, with a shear stress of 0.38 Pa and excitation of 1 V.
Original languageEnglish
Pages (from-to)923-926
Number of pages4
JournalProcedia chemistry.
Volume1
Issue number1
DOIs
Publication statusPublished - 1 Sep 2009

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