Energy dissipation in microfluidic beam resonators: Effect of Poisson's ratio
Name
Manalis-2011-Energy dissipation in microfluidic beam.pdf
Size
1.05 MB
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Adobe PDF
Checksum (MD5)
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Author(s)
Sader, John E.
Burg, Thomas P.
Lee, Jungchul
Manalis, Scott R.
Date Issued
August 2011
Journal
Physical Review E
Publisher
American Physical Society
Citation
Sader, John et al. “Energy dissipation in microfluidic beam resonators: Effect of Poisson’s ratio.” Physical Review E 84 (2011): n. pag. Web. 19 Oct. 2011. © 2011 American Physical Society
Version
Final published version
Abstract
Dissipation of mechanical energy underlies the sensitivity of many nanomechanical devices, with environmental effects often having a significant effect. One case of practical relevance is the interaction of elastic beam resonators with fluid, which is known to dramatically increase energy dissipation. Recently, we investigated energy dissipation in a different class of elastic beam resonator that embeds a microfluidic channel in its interior. In this paper, we examine the effect of the beam material Poisson ratio on these devices and discover that it can strongly affect energy dissipation—this is in direct contrast to conventional cantilever beams immersed in fluid. Increasing the Poisson ratio in these microfluidic devices is found to decrease energy dissipation, with the incompressible material limit providing minimum energy dissipation. Our paper establishes that, in this limit, placement of the fluid channel away from the beam neutral axis has negligible effect on energy dissipation in many cases of practical interest. The physical implications of these findings are discussed, and a detailed comparison with available experimental results is provided.
MIT Department
Massachusetts Institute of Technology. Department of Biological Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevE.84.026304
