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Area of Science:

  • Fluid Dynamics
  • Solid Mechanics
  • Instability Phenomena

Background:

  • Investigating the behavior of flexible structures in fluid flow is crucial for understanding various engineering and biological systems.
  • Beam buckling is a fundamental concept in structural mechanics, but its interaction with fluid flow introduces complex dynamics.

Purpose of the Study:

  • To analyze the buckling instability of a clamped beam subjected to creeping flow in a rectangular channel.
  • To elucidate the role of pressure feedback mechanisms in fluid-structure interaction.
  • To explore the potential application of this system as a passive flow control device.

Main Methods:

  • Precision experiments were conducted to observe the beam's behavior.
  • Computational simulations were employed to model the fluid-structure interaction.
  • Theoretical modeling was used to rationalize the observed phenomena and develop dimensionless parameters.

Main Results:

  • The study identified a critical flow rate at which the beam buckles and bends towards the channel wall.
  • A pressure feedback mechanism was shown to significantly influence the buckling instability.
  • The relationship between instability and dimensionless parameters was successfully rationalized.

Conclusions:

  • The clamped beam in creeping flow exhibits a flow-induced instability dependent on pressure feedback.
  • The system's ability to bend and interact with the channel wall allows for tunable flow selection.
  • This research demonstrates a novel application for passive flow redirection in hydraulic systems.