Frame rate free image velocimetry for microfluidic devices

Eliezer Keinan; Elishai Ezra; Yaakov Nahmias

doi:10.1063/1.4818142

Frame rate free image velocimetry for microfluidic devices

Eliezer Keinan, Elishai Ezra, Yaakov Nahmias^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Here, we introduce Streamline Image Velocimetry, a method to derive fluid velocity fields in fully developed laminar flow from long-exposure images of streamlines. Streamlines confine streamtubes, in which the volumetric flow is constant for incompressible fluid. Using an explicit analytical solution as a boundary condition, velocity fields and emerging properties such as shear force and pressure can be quantified throughout. Numerical and experimental validations show a high correlation between anticipated and measured results, with R² > 0.91. We report spatial resolution of 2 μm in a flow rate of 0.15 m/s, resolution that can only be achieved with 75 kHz frame rate in traditional particle tracking velocimetry.

Original language	English
Article number	063507
Journal	Applied Physics Letters
Volume	103
Issue number	6
DOIs	https://doi.org/10.1063/1.4818142
State	Published - 5 Aug 2013

Bibliographical note

Funding Information:
The authors would like to thank Prof. Mehmet Toner and Dr. Grace Chen for sharing streamline images. This work was supported by the European Research Council Starting Grant (TMIHCV 242699) and by International Re-integration Grant (MICROLIVER 248417). Resources were also provided by National Institute of Diabetes and Digestive and Kidney Diseases (K01DK080241). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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abstract = "Here, we introduce Streamline Image Velocimetry, a method to derive fluid velocity fields in fully developed laminar flow from long-exposure images of streamlines. Streamlines confine streamtubes, in which the volumetric flow is constant for incompressible fluid. Using an explicit analytical solution as a boundary condition, velocity fields and emerging properties such as shear force and pressure can be quantified throughout. Numerical and experimental validations show a high correlation between anticipated and measured results, with R2 > 0.91. We report spatial resolution of 2 μm in a flow rate of 0.15 m/s, resolution that can only be achieved with 75 kHz frame rate in traditional particle tracking velocimetry.",

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Frame rate free image velocimetry for microfluidic devices

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