Thermocapillary delay of drop coalescence

ORAL

Abstract

We present the results of a combined experimental and theoretical investigation of drop coalescence. Particular attention is given to elucidating how the time to coalescence, or residence time, is affected by a temperature difference between drop and bath. Experiments show that the residence time increases as the temperature difference to the 2/3 power. This simple scaling is rationalized through consideration of the thermal Marangoni flows induced.

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Authors

  • Michela Geri

    MIT- Department of Mechanical Engineering

  • Gareth McKinley

    Massachusetts Inst of Tech-MIT, Department of Mechanical Engineering, Massachusetts Institute of Technology, MIT, MIT- Department of Mechanical Engineering

  • John Bush

    MIT, Massachusetts Institute of Technology, Department of Mathematics, Massachusetts Institute of Technology, Department of Mathematics, MIT, MIT - Department of Mathematics