Macro-sized cantilevers oscillating in a fluid have been employed in applications ranging from thermal management to propulsion and represent a realistic tradeoff between full biomimicry and ease of fabrication. Surprisingly, the flow field generated upstream and downstream of the cantilever remains poorly understood. In order to properly control the resulting flow, further experimental and numerical studies are needed. From a two dimensional perspective, comprehensive analysis has been done, primarily through employing a single, very wide cantilever. However, many applications necessitate the usage of oscillating cantilevers whose oscillating amplitude is comparable to their width. As the region of analysis moves closer to a corner, where two edges of the slender cantilever meet, the flow becomes extremely three dimensional, rendering the two dimensional analysis tools less useful. The following paper seeks to further understand the highly three dimensional nature of the flow in addition to providing further insight into optimized flow control. Two perpendicular flow planes are analyzed in order to gather the x, y and z directional flow velocities using standard Particle Image Velocimetry measurements. It is shown that under certain circumstances, the resulting flow is atypical of what one would expect from a simple extrapolation from previous two dimensional flow analyses.
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ASME 2013 Fluids Engineering Division Summer Meeting
July 7–11, 2013
Incline Village, Nevada, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5554-6
PROCEEDINGS PAPER
Three Dimensional Flow Around a Biomimetic Unbounded Flapping Cantilever
Andrew Eastman,
Andrew Eastman
University of Pittsburgh, Pittsburgh, PA
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Mark Kimber
Mark Kimber
University of Pittsburgh, Pittsburgh, PA
Search for other works by this author on:
Andrew Eastman
University of Pittsburgh, Pittsburgh, PA
Mark Kimber
University of Pittsburgh, Pittsburgh, PA
Paper No:
FEDSM2013-16606, V01AT04A007; 10 pages
Published Online:
December 13, 2013
Citation
Eastman, A, & Kimber, M. "Three Dimensional Flow Around a Biomimetic Unbounded Flapping Cantilever." Proceedings of the ASME 2013 Fluids Engineering Division Summer Meeting. Volume 1A, Symposia: Advances in Fluids Engineering Education; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Applications in CFD; Bio-Inspired Fluid Mechanics; CFD Verification and Validation; Development and Applications of Immersed Boundary Methods; DNS, LES, and Hybrid RANS/LES Methods. Incline Village, Nevada, USA. July 7–11, 2013. V01AT04A007. ASME. https://doi.org/10.1115/FEDSM2013-16606
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