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Magnetically Induced Rotating Rayleigh-Taylor Instability
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Interaction of impinging marangoni fields.

Steven Iasella1, Ramankur Sharma1, Stephen Garoff2

  • 1Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.

Journal of Colloid and Interface Science
|September 27, 2023
PubMed
Summary
This summary is machine-generated.

Two spreading surfactant sources exhibit distinct interaction regimes: independent, interaction, and merged. Their movement and shape changes are driven by fluid dynamics and surface deformation, crucial for multi-source applications.

Keywords:
Numerical modelSolutal Marangoni flowSurface tensionSurfactantTransport phenomena

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Area of Science:

  • Fluid Dynamics
  • Surface Science
  • Chemical Engineering

Background:

  • Marangoni flows from single surfactant sources are well-studied.
  • Multi-source surfactant spreading is vital for industrial and medical applications.
  • Theoretical models often simplify systems to single surfactant sources.

Purpose of the Study:

  • To investigate the interaction dynamics of two spreading surfactant sources.
  • To explain source translation and deformation in multi-source systems.
  • To bridge the gap between single-source experiments and multi-source applications.

Main Methods:

  • Numerical simulations using COMSOL Multiphysics.
  • Modeling two oleic acid disks on a glycerol subphase.
  • Comparing two-source spreading to single-source dynamics.

Main Results:

  • Identified three interaction regimes: independent, interaction, and quasi-one disk.
  • Source translation is driven by subphase flow fields and surface deformation.
  • Source deformation occurs when surfactant fronts meet, leading to merging.

Conclusions:

  • Understanding two-source interactions is key to applying single-source insights to complex systems.
  • Transport modeling explains multi-source spreading phenomena like translation and deformation.
  • The study provides a framework for analyzing multi-source Marangoni flows.