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Updated: Mar 29, 2026

Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer
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Note: A kinematic shaker system for high amplitude, low frequency vibration testing.

Anand Swaminathan1, Matthew E Poese2, Robert W M Smith2

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The Review of Scientific Instruments
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Summary

A novel shaker system enables high-velocity, large-amplitude, low-frequency vibrations for Rayleigh-Bénard convection studies. This advanced system surpasses standard electromagnetic shakers, facilitating new research in parametric excitation.

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Area of Science:

  • Fluid Dynamics
  • Experimental Physics
  • Mechanical Engineering

Background:

  • Rayleigh-Bénard convection is a fundamental phenomenon in fluid dynamics.
  • Controlling convection often involves external forcing, such as acceleration modulation.
  • Standard vibration systems may lack the necessary parameters for specific excitation studies.

Purpose of the Study:

  • To describe a newly constructed shaker system.
  • To demonstrate its capability for high peak-velocity, large amplitude, low-frequency excitation.
  • To highlight its application in Rayleigh-Bénard convection experiments.

Main Methods:

  • The shaker system utilizes a kinematic linkage connected to two counter-rotating flywheels.
  • A variable-speed electrical motor drives the flywheels.
  • The system generates near-sinusoidal excitation with large displacements (15.24 cm peak-to-peak).

Main Results:

  • The shaker system was successfully constructed and employed in experiments.
  • It demonstrated the capability to produce high peak-velocity vibrations (up to 3.7 m/s).
  • The system operated without failure under demanding conditions.

Conclusions:

  • The developed shaker system offers unique capabilities beyond standard equipment.
  • It is suitable for parametric excitation studies requiring specific vibration characteristics.
  • This system advances experimental possibilities in fluid dynamics research.