Issue 14, 2021

Microchannel measurements of viscosity for both gases and liquids

Abstract

Quantifying the viscosity of a fluid is of great importance in determining its properties and can even be used to identify what the fluid is. While many techniques exist for measuring the viscosity of either gases or liquids, it is very challenging to probe both gases and liquids with a single approach because of the significant difference in their nature, and the vast difference in the values of their viscosities. We introduce a facile approach to measuring the viscosity of a Newtonian fluid, either a gas or a liquid, by flowing it through a deformable microchannel where the deformation depends on the pressure required to induce the flow, which, in turn, depends on the fluid viscosity. A strain gauge embedded just above and across the microchannel transduces the flow-induced deformation into strain. The strain is proportional to the square of the flow-induced deformation enabling us to precisely discriminate not only gases but also liquids based on their viscosities with the same device.

Graphical abstract: Microchannel measurements of viscosity for both gases and liquids

Supplementary files

Article information

Article type
Paper
Submitted
12 Mar 2021
Accepted
07 May 2021
First published
09 Jun 2021

Lab Chip, 2021,21, 2805-2811

Microchannel measurements of viscosity for both gases and liquids

K. Shiba, G. Li, E. Virot, G. Yoshikawa and D. A. Weitz, Lab Chip, 2021, 21, 2805 DOI: 10.1039/D1LC00202C

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