Evolution dynamics of thin liquid structures investigated using a phase-field model

Wu, Yanchen; Wang, Fei; Zheng, Sai; Nestler, Britta

doi:10.1039/d3sm01553j

Cited by 1 publication

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“…The breakup of layered liquid structures has been comprehensively studied in Ref. [31] and is out of the scope of the current work. We anticipate our elucidation on the macroscopic and microscopic depletion/ adsorption layers can deepen previous understanding on the depletion/adsorption mechanism.…”

Section: Introductionmentioning

confidence: 99%

Wetting Effect Induced Depletion and Adsorption Layers: Diffuse Interface Perspective

Zhang,

Wang

et al. 2024

ChemPhysChem

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When multi‐component fluid contact the rigid substrate, the van der Waals interaction between fluids and substrate induces a depletion/adsorption layer on the intrinsic wettability of the system. In this study, we investigate the depletion/adsorption behaviors of A‐B fluid system. We derive analytical expressions for the equilibrium layer thickness and the equilibrium composition distribution near the solid wall, based on the theories of de Gennes and Cahn. Our derivation is verified through phase‐field simulations, wherein the substrate wettability, A‐B interfacial tension, and temperature are systematically varied. Our findings underscore two pivotal mechanisms governing the equilibrium layer thickness: With an increase in the wall free energy, the substrate wettability dominates, aligning with de Gennes' theory. When the interfacial tension increases, or temperature rises, the layer is determined by the A‐B interactions, obeying Cahn's theory. Additionally, we extend our study to non‐equilibrium systems where the initial composition deviates from the binodal line. Notably, macroscopic depletion/adsorption layers form on the substrate, which are significantly thicker than equilibrium microscopic layers. This macroscopic layer formation can be attributed to the interplay of phase separation and Ostwald ripening. We anticipate our finding could deepen our knowledge on the depletion/adsorption behaviors for fluids.

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Section: Introductionmentioning

confidence: 99%

Wetting Effect Induced Depletion and Adsorption Layers: Diffuse Interface Perspective

Zhang,

Wang

et al. 2024

ChemPhysChem

Self Cite

View full text Add to dashboard Cite

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Evolution dynamics of thin liquid structures investigated using a phase-field model

Abstract: Liquid structures of thin-films and torus droplets are omnipresent in daily lives. The morphological evolution of liquid structures suspending in another immiscible fluid and sitting on a solid substrate is...

Cited by 1 publication

References 101 publications

Wetting Effect Induced Depletion and Adsorption Layers: Diffuse Interface Perspective

Wetting Effect Induced Depletion and Adsorption Layers: Diffuse Interface Perspective

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