2020/09/05 by Virgile Thiévenaz, Thomas Séon, Christophe Josserand
Engineering · Physics and Astronomy · #Boundary layer #Drop (telecommunication) #Drop impact #Fluid Dynamics Simulations and Interactions #Fluid Dynamics and Heat Transfer #Fluid Dynamics and Thin Films #Reynolds number #Scaling #Thermal #physics.flu-dyn
paper · pdf · doi:10.1209/0295-5075/132/24002
Seven pages, five figures
arxiv created 2020/09/05 · openalex created_date 2020/09/11 · openalex publication_date 2020/10/01 · arxiv updated 2021/02/03 · openalex updated_date 2026/08/05
Abstract We experimentally investigate the effect of freezing on the spreading of a water drop. Whenever a water drop impacts a cold surface, whose temperature is lower than 0 °C, a thin layer of ice grows during the spreading. This freezing has a notable effect on the impact: at given Reynolds and Weber numbers, we show that lowering the surface temperature reduces the drop maximal extent. Using an analogy between this ice layer and the viscous boundary layer, which also grows during the spreading, we are able to model the effect of freezing as an effective viscosity. The scaling laws designed for viscous drop impact can therefore be applied to such a solidification problem, avoiding the recourse to a full and complex modelling of the thermal dynamics.