TY - CONF
T1 - The effect of viscosity on turbulent mixing in a co-flowing jet mixer
AU - Pathikonda, Gokul
AU - Usta, Mustafa
AU - Ahmad, Cameron
AU - Lee, Vincent
AU - Khan, Irfan
AU - Gillis, Paul
AU - Ranjan, Devesh
AU - Aidun, Cyrus
N1 - Funding Information:
This project is funded by Dow through the University Project Initiative. This work also used the Extreme Science and Engineering Discovery Environment (XSEDE) for computational need, which is supported by National Science Foundation grant number TG-CTS100012. Specifically, we used the Stampede2 system at the Texas Advanced Computing Center (TACC).
Publisher Copyright:
© 2019 International Symposium on Turbulence and Shear Flow Phenomena, TSFP. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Turbulent shear-driven mixing in a coaxial and co-flowing configuration is studied experimentally and computationally to understand and model the effect of viscosity gradients in the flow field. Two liquids with a large disparity in dynamic viscosity are mixed, with a low viscosity liquid injected as a high-velocity inner jet into a high viscosity co-flowing outer flow. Simultaneous experimental measurements of the velocity and concentration fields are made using high-resolution PIV and PLIF to obtain their turbulent cross-correlation statistics for viscosity ratios of 1 and 40. LES simulations are also performed using various mixture subgrid-scale (SGS) to investigate the effectiveness of the same in predicting the scalar mixing and to complement the experimental observations. We aim to understand the effect viscosity gradients in the flow have on turbulent mixing at high Schmidt (Sc) and Reynolds numbers (Re). The preliminary experimental and computational results already show a stark difference in the flow structure.
AB - Turbulent shear-driven mixing in a coaxial and co-flowing configuration is studied experimentally and computationally to understand and model the effect of viscosity gradients in the flow field. Two liquids with a large disparity in dynamic viscosity are mixed, with a low viscosity liquid injected as a high-velocity inner jet into a high viscosity co-flowing outer flow. Simultaneous experimental measurements of the velocity and concentration fields are made using high-resolution PIV and PLIF to obtain their turbulent cross-correlation statistics for viscosity ratios of 1 and 40. LES simulations are also performed using various mixture subgrid-scale (SGS) to investigate the effectiveness of the same in predicting the scalar mixing and to complement the experimental observations. We aim to understand the effect viscosity gradients in the flow have on turbulent mixing at high Schmidt (Sc) and Reynolds numbers (Re). The preliminary experimental and computational results already show a stark difference in the flow structure.
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M3 - Paper
AN - SCOPUS:85084024374
T2 - 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
Y2 - 30 July 2019 through 2 August 2019
ER -