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Dynamic interactions between drops-a critical assessment.

Rogerio Manica1, Evert Klaseboer1, Derek Y C Chan2

  • 1Institute of High Performance Computing, 1 Science Park Road, 117528, Singapore. manicar@ihpc.a-star.edu.sg evert@ihpc.a-star.edu.sg D.Chan@unimelb.edu.au.

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Summary
This summary is machine-generated.

Accurate models of colliding liquid drops show that accounting for drop deformation and film drainage is crucial. This reveals quantitative differences compared to simpler flat film models of drop coalescence.

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Area of Science:

  • Fluid dynamics
  • Interfacial phenomena
  • Multiphase flow

Background:

  • Drop coalescence is a fundamental process in many natural and industrial applications.
  • Existing models often simplify the complex dynamics of interacting liquid drops.
  • Understanding time-dependent deformations is key to accurate coalescence prediction.

Purpose of the Study:

  • To accurately model the time-dependent deformations during liquid drop collisions.
  • To highlight the importance of initial and boundary conditions in coalescence simulations.
  • To compare results with the established Stefan-Reynolds flat film model.

Main Methods:

  • Experimental measurements of colliding liquid drop deformation.
  • Development of a computational model incorporating drop deformation and film drainage.
  • Analysis of initial and boundary conditions' impact on coalescence dynamics.

Main Results:

  • Accurate measurements confirm the necessity of considering dynamic drop deformation.
  • The developed model reveals significant quantitative discrepancies with the Stefan-Reynolds model.
  • Film drainage and deformation significantly influence the coalescence outcome.

Conclusions:

  • The study underscores the limitations of simplified models in drop coalescence.
  • Accurate modeling requires comprehensive consideration of drop deformation and film drainage.
  • Findings provide a more robust framework for understanding liquid-liquid interactions.