Effect of Shear Thinning Rheological Properties on Particle Migration in Microchannels

SHEN Yang; WANG Qikun; LIU Tangjing

doi:10.21656/1000-0887.440326

Volume 45 Issue 5

May 2024

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Article Navigation > Applied Mathematics and Mechanics > 2024 > 45(5): 637-650

SHEN Yang, WANG Qikun, LIU Tangjing. Effect of Shear Thinning Rheological Properties on Particle Migration in Microchannels[J]. Applied Mathematics and Mechanics, 2024, 45(5): 637-650. doi: 10.21656/1000-0887.440326

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Effect of Shear Thinning Rheological Properties on Particle Migration in Microchannels

doi: 10.21656/1000-0887.440326

School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, P.R.China

Received Date: 2023-11-01
Rev Recd Date: 2024-01-03
Publish Date: 2024-05-01

Abstract

Abstract

A relative motion model was used to numerically simulate the phenomenon of particle aggregation in shear thinning fluids. To understand the shear thinning effects on particle mechanical properties in microfluidics, the shear thinning matching was performed with viscoelastic and non-viscoelastic fluids. The research results indicate that, shear thinning characteristics can significantly alter the mechanical properties of particles. In non-viscoelastic fluids, shear thinning can cause the aggregation position of particles to move towards the wall, and has an incentive effect on the aggregation speed of particles. In viscoelastic fluids, the occurrence of shear thinning will bring a decrease of the fluid elasticity, resulting in particle convergence from the center to the wall.
- viscoelastic fluid,
- particle aggregation,
- shear thinning,
- numerical simulation

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References

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