Competition after liquid droplet contact on super-cooled surfaces: spreading vs solidification

ORAL

Abstract

Additive manufacturing processes are based on liquid droplet solidification after their deposition on super-cooled surfaces. However, the exact processes leading to certain splat properties are yet unknown. Observing spreading hexadecane droplets on super-cooled plates by means of total internal reflection (TIR) imaging allows completely new, temporally and spatially resolved, insights into the solidification patterns and dynamics. Various regimes of solidification are observed, depending on the surface temperature. The total rate of solidification can be theoretically described, based by the Johnson-Mehl-Avrami-Kolmogorov (JMAK) equation. We also quantify the nucleation rate and dendritic growth during the solidification, to investigate the arrest behavior of spreading droplets.

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Presenters

  • Robin Koldeweij

    • Univ of Twente, TNO
    • Twente Tech Univ

Authors

  • Robin Koldeweij

    • Univ of Twente, TNO
    • Twente Tech Univ

  • Kirsten Harth

    • Univ of Twente
    • Univ. Twente

  • Michiel A. J. Limbeek

    • Univ of Twente
    • University of Twente

  • Pallav Kant

    • Univ of Twente
    • Twente

  • Jacco H. Snoeijer

    • Univ of Twente
    • University of Twente
    • Physics of Fluids, University of Twente, The Netherlands
    • Twente

  • Detlef Lohse

    • University of Twente
    • Physics of Fluids and Max Planck Center for Complex Fluids Dynamics, University of Twente, Enschede, The Netherlands
    • Univ of Twente
    • Univ of Twente, Max Plank Institute for Dynamics and Self-Organization
    • Twente Tech Univ
    • University of Twente, Max Planck Center for complex fluid dynamics