Dilute Polymer Droplets Show Generalized Wetting Dynamics via an Average Viscosity.

ABSTRACT: Despite the prevalence of non-Newtonian fluids in various practical applications, comprehensive dynamic wetting models are lacking. Existing models often oversimplify complex rheological behavior, limiting our ability to predict wetting dynamics. This work introduces and experimentally validates a generalized model for the dynamic wetting of non-Newtonian shear-thinning fluids (dilute polymer solutions) on solid substrates. We experimentally analyzed 12 different shear-thinning fluids using both a power-law model and Carreau-Yasuda model. The data clearly show that the dynamic contact angle can be generalized using an average viscosity to capture rheological changes during droplet spreading. The average viscosity was defined using the fluid's constitutive model over shear rates relevant to

SUBMITTER: Azimi Yancheshme A 

PROVIDER: S-EPMC11474820 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature