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Updated: Aug 11, 2026

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique
Published on: June 12, 2015
Influence of scale-breaking phenomena on turbulent mixing rates
Erwin George1, James Glimm, Xiaolin Li
1Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, New York 11794-3600, USA. egeorge@ams.sunysb.edu
Abstract:
Simulations not seen before compare turbulent mixing rates for ideal fluids and for real immiscible fluids with experimental values for the surface tension. The simulated real fluid mixing rates lie near the center of the range of experimental values. A comparison to theoretical predictions relating the mixing rate, the bubble width, and the bubble height fluctuations based on bubble merger models shows good agreement with experiment. The ideal fluid mixing rate is some 50% larger, providing an example of the sensitivity of the mixing rate to physical scale breaking interfacial phenomena; we also observe this sensitivity to numerical scale-breaking artifacts.
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