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May 24, 2026Journal of Fluid MechanicsOpen Access

Self-similar pinch-off in surfactant-laden flows in a capillary tube

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Authors

MSMosayeb ShamsDPDebashis PandaAAAbdullah Mahdi Abdal

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Overview

Randomized trial investigates pinch-off behavior in surfactant-laden fluids, implying critical insights for fluid dynamics.

Key Points

  • The research aims to analyze how surfactants influence the pinch-off dynamics during fluid displacement in capillary tubes.
  • Investigated dynamics of a fluid surrounded by a viscous fluid in cylindrical tubes.
  • Focused on visco-capillary displacement at critical flow rates with varying wettability.
  • Examined contact line behaviors influenced by insoluble surfactants.
  • The neck diameter evolution follows a power law τ^α with α decreasing from near 1/2 to 1/5 as contact-line velocity reduces.
  • Surfactant presence causes contact-line velocity to scale linearly with surfactant elasticity due to Marangoni stresses.
  • Pinch-off dynamics display consistent self-similar scaling characteristics, similar to surfactant-free conditions.

Cite This Study

Shams et al. (2026) studied this question.

synapsesocial.com/papers/6a1296b248a0ea1665673b3ahttps://doi.org/10.1017/jfm.2026.11583
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