Mixing of miscible shear-thinning fluids in a lid-driven cavity

doi:10.1016/j.cjche.2022.10.004

Chinese Journal of Chemical Engineering ›› 2023, Vol. 58 ›› Issue (6): 112-123.DOI: 10.1016/j.cjche.2022.10.004

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Mixing of miscible shear-thinning fluids in a lid-driven cavity

Junhao Wang^1,2, Shugang Ma³, Peng Chen^1,2, Zhipeng Li^1,2, Zhengming Gao^1,2, J. J. Derksen⁴

1. Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2. State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
3. PetroChina Petrochemical Research Institute, Beijing 102206, China;
4. School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK

Received:2022-06-18 Revised:2022-09-30 Online:2023-08-31 Published:2023-06-28
Contact: Zhipeng Li,E-mail:lizp@mail.buct.edu.cn;Zhengming Gao,E-mail:gaozm@mail.buct.edu.cn
Supported by:
The financial supports from the National Natural Science Foundation of China (22178014) is gratefully acknowledged.

Mixing of miscible shear-thinning fluids in a lid-driven cavity

Junhao Wang^1,2, Shugang Ma³, Peng Chen^1,2, Zhipeng Li^1,2, Zhengming Gao^1,2, J. J. Derksen⁴

1. Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2. State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
3. PetroChina Petrochemical Research Institute, Beijing 102206, China;
4. School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK

通讯作者: Zhipeng Li,E-mail:lizp@mail.buct.edu.cn;Zhengming Gao,E-mail:gaozm@mail.buct.edu.cn
基金资助:
The financial supports from the National Natural Science Foundation of China (22178014) is gratefully acknowledged.

Abstract

Abstract: The concentration and velocity fields of two refractive index matched miscible shear-thinning fluids in a lid-driven cavity were investigated by using planar laser-induced fluorescence and particle image velocimetry, as well by computational fluid dynamics. Quantitative analyses show that the results obtained by flow simulations with the species transport model are in good agreement with the experimental results. The effects of different parameters were studied by using the intensity of segregation. For two fluids with the same rheological parameters, the relative amounts of liquids H₁/H and the power-law index n dominate the mixing process while the Reynolds number Re plays a marginal role. As for two fluids with density difference, buoyancy has significant influence on the mixing process. The dimensionless group Ar/Re (redefined such as to include shear thinning behavior) is proposed for assessing the effect of buoyancy and rheological properties on the mixing of miscible shear-thinning fluids.

Key words: Shear-thinning fluid, Mixing of miscible fluids, Particle image velocimetry, Planar laser-induced fluorescence, Species transport model, Lid-driven cavity

摘要： The concentration and velocity fields of two refractive index matched miscible shear-thinning fluids in a lid-driven cavity were investigated by using planar laser-induced fluorescence and particle image velocimetry, as well by computational fluid dynamics. Quantitative analyses show that the results obtained by flow simulations with the species transport model are in good agreement with the experimental results. The effects of different parameters were studied by using the intensity of segregation. For two fluids with the same rheological parameters, the relative amounts of liquids H₁/H and the power-law index n dominate the mixing process while the Reynolds number Re plays a marginal role. As for two fluids with density difference, buoyancy has significant influence on the mixing process. The dimensionless group Ar/Re (redefined such as to include shear thinning behavior) is proposed for assessing the effect of buoyancy and rheological properties on the mixing of miscible shear-thinning fluids.

关键词: Shear-thinning fluid, Mixing of miscible fluids, Particle image velocimetry, Planar laser-induced fluorescence, Species transport model, Lid-driven cavity

Junhao Wang, Shugang Ma, Peng Chen, Zhipeng Li, Zhengming Gao, J. J. Derksen. Mixing of miscible shear-thinning fluids in a lid-driven cavity[J]. Chinese Journal of Chemical Engineering, 2023, 58(6): 112-123.

Junhao Wang, Shugang Ma, Peng Chen, Zhipeng Li, Zhengming Gao, J. J. Derksen. Mixing of miscible shear-thinning fluids in a lid-driven cavity[J]. 中国化学工程学报, 2023, 58(6): 112-123.

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Mixing of miscible shear-thinning fluids in a lid-driven cavity

Mixing of miscible shear-thinning fluids in a lid-driven cavity

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