Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session G14: Aerodynamics: Fluid Structure Interaction II
10:35 AM–12:45 PM,
Monday, November 19, 2018
Georgia World Congress Center
Room: B301
Chair: David MacPhee, The University of Alabama
Abstract ID: BAPS.2018.DFD.G14.2
Abstract: G14.00002 : Could implantable body flow sensors be self-powered?
10:48 AM–11:01 AM
Presenter:
Lucy Elaine Fitzgerald
(University of Virginia)
Authors:
Lucy Elaine Fitzgerald
(University of Virginia)
Maria Lilibeth Contreres
(University of Virginia)
Daniel Quinn
(Stanford Univ, University of Virginia)
The rise of Smart Health has led to implantable healthcare devices that can diagnose and monitor diseases in real-time. Some diagnoses are based on fluids in the body: reduced lung flow may indicate an asthma attack, and high turbulence in the blood may indicate hemolysis. A key challenge of current `implantables’ is that they are difficult to power and require iterative surgeries to replace batteries. Here we show that a piezoelectric flow sensor could monitor a fluid flow and power itself from the same flow at the same time. The effectiveness of this dual-purpose sensor/harvester depends on flow properties. A sensor that measures flowrate needs a different duty cycle than one that measures subtle abnormalities, such as turbulent wakes caused by inflammation. In the human airway, a sensor could use bidirectional airflow to create an oscillating voltage directly. In unidirectional artery flow, sensing/harvesting depends on complex fluid-structure interactions like flutter. This variation allows a breadth of applications, but it also demands advanced models that capture the tradeoffs between sensing fidelity and harvesting potential. To develop these models, we built a platform for testing the sensing/harvesting capability of piezocantilevers in bio-inspired oscillating flows.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.G14.2
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