Hudson, S.
(2009),
Poiseuille flow and drop circulation in microchannels, Rheologica ACTA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=903050
(Accessed October 27, 2025)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Poiseuille flow and drop circulation in microchannels
Published
Author(s)
Abstract
Microfluidics aims to control precisely the transport of fluids and suspended particles or drops. Here we calculate two characteristics of interest in rectangular microchannels, as a function of the cross-sectional aspect ratio. First, we present a convenient expression for the ratio of the centerline to bulk flow velocities, which is relevant for controlling the flow of suspended or flow-focused objects. In addition, using the theory of Nadim and Stone, the droplet circulation fountain-flow pattern in such channels is evaluated explicitly, and implications for interfacial mobility measurements are discussed. For example, when the interface is retarded, part of the fountain reverses direction, thus alleviating stagnation, promoting mixing, and reducing interfacial concentration gradients.Citation
Rheologica ACTA
Volume
49
Issue
3
Pub Type
Journals
Download Paper
Keywords
microfluidics, multiphase flow, droplets, interfacial retardation, Marangoni flow
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact [email protected].
Created October 29, 2009, Updated February 19, 2017