Loughborough University
2 files

Data for Dynamics of particle aggregation in dewetting films of complex liquids

Version 2 2024-05-14, 13:32
Version 1 2023-11-24, 09:23
online resource
posted on 2024-05-14, 13:32 authored by Junzhe ZhangJunzhe Zhang, David SibleyDavid Sibley, Andrew ArcherAndrew Archer, Dmitri TseluikoDmitri Tseluiko

We consider the dynamic wetting and de-wetting processes of films and droplets of complex liquids on planar surfaces, focusing on the case of colloidal suspensions, where the particle interactions can be sufficiently attractive to cause agglomeration of the colloids within the film. This leads to complex dynamics within the liquid and of the liquid-air interface. Incorporating concepts from thermodynamics and using the thin-film approximation, we construct a model consisting of a pair of coupled partial differential equations that represent the evolution of the liquid film and the effective colloidal height profiles. We determine the relevant phase behaviour of the uniform system, including finding associated binodal and spinodal curves, helping to uncover how the emerging behaviour depends on the particle interactions. Performing a linear stability analysis of our system enables us to identify parameter regimes where agglomerates form, which we independently confirm through numerical simulations and continuation of steady states, to construct bifurcation diagrams. We obtain various dynamics such as uniform colloidal profiles in an unstable situation evolving into agglomerates and thus elucidate the interplay between de-wetting and particle aggregation in complex liquids on surfaces.

© the authors



  • Science


  • Mathematical Sciences

Usage metrics

    Mathematical Sciences


    Ref. manager