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Shear Evolution and Slippage of the Liquid-Liquid Interface over a Liquid-Infused Surface: A Many-Body Dissipative
Liuzhen Ren1, Jiangzhuo Ren1, Luyao Bao2
1School of Construction Machinery, Chang'an University, Xi'an, Shaanxi 710064, People's Republic of China.
Langmuir : the ACS Journal of Surfaces and Colloids
|February 21, 2025
Summary
Shear forces can deform liquid-liquid interfaces (LLI) on liquid-infused surfaces (LIS), affecting flow slippage. Optimizing LIS for drag reduction requires considering both LLI shear resistance and slippage behavior.
Area of Science:
- Fluid dynamics
- Surface science
- Materials science
Background:
- Liquid-liquid interfaces (LLI) are crucial for flow slippage and drag reduction on liquid-infused surfaces (LIS).
- Flow shear can significantly impact the stability and behavior of LLIs.
Purpose of the Study:
- To investigate the shear-induced evolution of LLIs on periodically grooved LIS.
- To understand the relationship between shear rate, LLI deformation, and resulting flow slippage.
Main Methods:
- Transverse many-body dissipative dynamics simulation method.
- Analysis of LLI deformation, depinning of contact lines, and effective slippage under varying shear rates.
Main Results:
- Low shear rates cause minor LLI deformation, with slippage dependent on shear rate.
- High shear rates lead to apparent LLI deformation and contact line depinning, significantly increasing slippage, especially for convex LLIs.
- Flat LLIs exhibit greater stability than convex or concave LLIs under shear.
Conclusions:
- Flow slippage is influenced by LLI deflection and shear rate.
- Designing effective LIS for drag reduction necessitates considering both the shear resistance and slippage of the LLI.
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