Journal article

Assessment of a miniature four-roll mill and a cross-slot microchannel for high-strain-rate stagnation point flows

Farzan Akbaridoust, Jimmy Philip, Ivan Marusic

MEASUREMENT SCIENCE AND TECHNOLOGY | IOP PUBLISHING LTD | Published : 2018

Abstract

Stagnation point flows have been widely used to study the deformation and break-up of objects in two-dimensional pure straining flows. Here, we report a systematic study of the characterisation of stagnation point flows in two devices, a miniature Taylors fourroll mill and a cross-slot microchannel. The aim of the study is to find the best platform suitable for investigating the effect of strain rate on the mechanical properties of waterborne microorganisms. Using micro-PIV, the velocity field and the strain rates in both devices were measured at different flow rates and compared with an ideal hyperbolic stagnation point flow. The cross-slot microchannel was found to be a better experimental..

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Grants

Funding Acknowledgements

The authors gratefully acknowledge the Australian Research Council for the financial support of this work. This work was performed in part at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF).