A soft microchannel decreases polydispersity of droplet generation

Yan Pang; Hyoungsoo Kim; Zhaomiao Liu; Howard A. Stone

doi:10.1039/c4lc00871e

A soft microchannel decreases polydispersity of droplet generation

Yan Pang, Hyoungsoo Kim, Zhaomiao Liu, Howard A. Stone

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

46 Scopus citations

Abstract

We study the effect of softness of the microchannel on the process of droplet generation in two-phase flows in a T-junction microchannel. One side of the microchannel has a flexible thin PDMS layer, which vibrates naturally while droplets are generated; the deformation frequency coincides with the frequency of droplet formation. Furthermore, we compare the polydispersity of water-in-oil droplets formed with a microchannel with one soft wall with those formed in a conventional rigid microchannel. We show that deformation of the soft wall reduces the polydispersity in the droplet size.

Original language	English (US)
Pages (from-to)	4029-4034
Number of pages	6
Journal	Lab on a Chip
Volume	14
Issue number	20
DOIs	https://doi.org/10.1039/c4lc00871e
State	Published - Oct 21 2014

All Science Journal Classification (ASJC) codes

General Chemistry
Bioengineering
Biochemistry
Biomedical Engineering

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10.1039/c4lc00871e

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N2 - We study the effect of softness of the microchannel on the process of droplet generation in two-phase flows in a T-junction microchannel. One side of the microchannel has a flexible thin PDMS layer, which vibrates naturally while droplets are generated; the deformation frequency coincides with the frequency of droplet formation. Furthermore, we compare the polydispersity of water-in-oil droplets formed with a microchannel with one soft wall with those formed in a conventional rigid microchannel. We show that deformation of the soft wall reduces the polydispersity in the droplet size.

AB - We study the effect of softness of the microchannel on the process of droplet generation in two-phase flows in a T-junction microchannel. One side of the microchannel has a flexible thin PDMS layer, which vibrates naturally while droplets are generated; the deformation frequency coincides with the frequency of droplet formation. Furthermore, we compare the polydispersity of water-in-oil droplets formed with a microchannel with one soft wall with those formed in a conventional rigid microchannel. We show that deformation of the soft wall reduces the polydispersity in the droplet size.

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A soft microchannel decreases polydispersity of droplet generation

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