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  • Cited by 2
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    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Ozsun, Ozgur Thompson, Rebecca L. Ekinci, Kamil L. and Tien, Joe 2014. Non-invasive mapping of interstitial fluid pressure in microscale tissues. Integr. Biol., Vol. 6, Issue. 10, p. 979.


    Chaudhury, A.R. Pantazis, A.K. and Chronis, N. 2016. An image contrast-based pressure sensor. Sensors and Actuators A: Physical, Vol. 245, p. 63.


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  • Journal of Fluid Mechanics, Volume 734
  • November 2013, R1

Non-invasive measurement of the pressure distribution in a deformable micro-channel

  • Ozgur Ozsun (a1), Victor Yakhot (a1) and Kamil L. Ekinci (a1)
  • DOI: http://dx.doi.org/10.1017/jfm.2013.474
  • Published online: 07 October 2013
Abstract
Abstract

Direct and non-invasive measurement of the pressure distribution in test sections of a micro-channel is a challenging, if not an impossible, task. Here, we present an analytical method for extracting the pressure distribution in a deformable micro-channel under flow. Our method is based on a measurement of the channel deflection profile as a function of applied hydrostatic pressure; this initial measurement generates ‘constitutive curves’ for the deformable channel. The deflection profile under flow is then matched to the constitutive curves, providing the hydrodynamic pressure distribution. The method is validated by measurements on planar microfluidic channels against analytic and numerical models. The accuracy here is independent of the nature of the wall deformations and is not degraded even in the limit of large deflections, ${\zeta }_{max} / 2{h}_{0} = O(1)$, with ${\zeta }_{max} $ and $2{h}_{0} $ being the maximum deflection and the unperturbed height of the channel, respectively. We discuss possible applications of the method in characterizing micro-flows, including those in biological systems.

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Email address for correspondence: ekinci@bu.edu
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Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
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