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August 8, 2026Journal of Fluid Mechanics

Unsteady flow of a two-layer fluid generated by a moving circular cylinder

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Authors

VKVasily KostikovAGAlexander E. GolikovNMN. I. Makarenko

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Overview

Randomized trial observes interface flow dynamics in two-layer fluids, suggesting gravity's minor impact early on.

Key Points

  • This research aims to understand the behavior of interface flow in two-layer fluids caused by the motion of a circular cylinder.
  • Develop an integro-differential system of equations for velocity components at the interface.
  • Construct a small-time asymptotic solution for a cylinder accelerating from rest.
  • Analyze the impact of various density ratios and cylinder motion directions on flow behavior.
  • The study reveals negligibly small contributions of nonlinear effects and gravitational forces during the initial stage of cylinder motion.
  • Different density ratios affect the interface flow distinctly, with more pronounced effects at higher ratios.
  • Hydrodynamic forces acting on the cylinder vary based on the direction of its motion and the density difference.

Cite This Study

Kostikov et al. (2026) studied this question.

synapsesocial.com/papers/6a76db2df12abadc7981634chttps://doi.org/10.1017/jfm.2026.11884
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