Dynamic arrest during the spreading of a yield stress fluid drop
Grégoire Martouzet, Loren Jørgensen, Yoann Pelet, Anne‐Laure Biance, Catherine Barentin
Abstract
We study the spreading of drops made of yield-stress fluids. In contrast to what is observed in Newtonian fluids, the final contact angle reached by the drop depends on the drop size, on its yield stress, and on the liquid/solid hydrodynamic boundary condition. This highlights the crucial role of dynamic history. We then extend the classical Young's law to the case of yield stress fluids. In particular, by considering that the final shape of the drop is set by a dynamical arrest, we predict the observed final contact angle.
Topics & Concepts
Drop (telecommunication)MechanicsYield (engineering)Newtonian fluidMaterials scienceContact anglePhysicsComposite materialEngineeringMechanical engineeringRheology and Fluid Dynamics StudiesFluid Dynamics and Heat TransferSurface Modification and Superhydrophobicity