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Dynamic wetting of solid-liquid-liquid system by molecular kinetic theory. | LitMetric

Dynamic wetting of solid-liquid-liquid system by molecular kinetic theory.

J Colloid Interface Sci

State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, PR China; Chemical and Petroleum Engineering, University of Calgary, Alberta T2N1N4, Canada.

Published: November 2020

AI Article Synopsis

  • The study explores dynamic wetting in a solid-liquid-liquid (SLL) system using molecular kinetic theory (MKT) to analyze how the viscosity of two liquids impacts wetting behavior.
  • The research identifies and categorizes the viscosity effects into three distinct regions: two pure liquid zones and a mixing zone, while also proposing a new model for understanding energy dissipation at the three-phase contact line.
  • Findings contribute to a deeper understanding of the interplay between fluid viscosity and solid surface characteristics in dynamic wetting, highlighting limitations of existing theories and proposing methods for better prediction of wetting dynamics.

Article Abstract

Hypothesis: The mechanisms of dynamic wetting of solid-liquid-liquid (SLL) system, especially the viscosity effects of two liquids, can be investigated by the molecular kinetic theory (MKT).

Methods: The molecular kinetic theory combined with published data was used to study the roles of a fluid viscosity and a solid surface in dynamic wetting.

Findings: First, the MKT on dynamic wetting was introduced and its limitation was analyzed. Second, a viscosity effect and a solid surface effect were considered. The viscosity effect was divided into three parts for the first time, including two pure liquid zones and a mixing zone. Third, a coefficient activation free energy model was proposed, considering the effects of mixing liquids and a solid surface. Finally, the key parameters in the MKT and the application and validation of the coefficient activation free energy model were discussed in detail. This model can explain the energy dissipation in a vicinity of a three-phase contact-line successfully in a SLL wetting system. This work sheds light on the physical mechanisms of fluid and solid surface properties on the dynamic wetting in a SLL system.

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Source
http://dx.doi.org/10.1016/j.jcis.2020.06.101DOI Listing

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