Buckling response of electrothermally actuated micro-beams to parallel and transverse flow

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

We explore both theoretically and experimentally the role of the flow direction on the performance of a novel flow sensor based on post buckling deflection monitoring of electro-thermally actuated double-clamped micro beams. Single crystal Si beams were buckled by a compressive stress arising due to Joule's heating. In the case of a flow directed along the beam, increase of the stream velocity resulted in decrease of the deflection due to the cooling of the beam by conductive heat transfer and convection. In the case of a transverse flow the drag force acting on the structure had a competing effect and deflection decrease was less pronounced. In the case of parallel flow, the deflection sensitivity of 1.5 μm/(m/s) and the critical current sensitivity of 0.4 mA/(m/s) were registered in the experiments. The results were qualitatively consistent with the predictions of the coupled nonlinear reduced order structural, fluidic and heat transfer models.

Original languageEnglish
Title of host publicationIEEE Sensors, SENSORS 2016 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479982875
DOIs
StatePublished - 5 Jan 2016
Event15th IEEE Sensors Conference, SENSORS 2016 - Orlando, United States
Duration: 30 Oct 20162 Nov 2016

Publication series

NameProceedings of IEEE Sensors
Volume0
ISSN (Print)1930-0395
ISSN (Electronic)2168-9229

Conference

Conference15th IEEE Sensors Conference, SENSORS 2016
Country/TerritoryUnited States
CityOrlando
Period30/10/162/11/16

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