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Magnetohydrodynamic levitation for high-performance flexible pumps.

Yoav Matia1,2, Hyeon Seok An1, Robert F Shepherd1

  • 1Department of Mechanical Engineering, Cornell University, Ithaca, NY 14853.

Proceedings of the National Academy of Sciences of the United States of America
|July 20, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed a soft, elastomeric, solenoid-driven pump (ESP) using magnetohydrodynamic levitation. This innovative pump maintains performance under deformation, enabling self-propulsion in soft robotic applications.

Keywords:
fluid–structure interactionmagnetohydrodynamic levitationsoft displacement pumpsoft roboticsviscous flow

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Area of Science:

  • Soft Robotics
  • Fluid Dynamics
  • Biomimetics

Background:

  • Soft robotic systems require adaptable fluidic components.
  • Existing pumps often fail under significant deformation.
  • Magnetohydrodynamics offers novel actuation and sealing mechanisms.

Purpose of the Study:

  • To develop a soft, deformable pump for soft robotics.
  • To investigate magnetohydrodynamic levitation for pump operation.
  • To characterize pump performance under deformation.

Main Methods:

  • Fabrication of a solenoid-driven pump using a magnet piston and ferrofluid seal.
  • Modeling of magnetohydrodynamic levitation and viscous lift for centering.
  • Experimental validation of pump performance (pressure, flow rate) under deformation.
  • Integration into a soft robotic chassis for locomotion.

Main Results:

  • Achieved shut-off pressures of 2-8 kPa and flow rates of 50-320 mL/min.
  • Demonstrated continuous pumping performance during significant deformation.
  • Reported highest duty point for a pump operating under self-deformation.
  • Successfully propelled a soft robot through a complex pathway.

Conclusions:

  • Magnetohydrodynamic levitation enables efficient, deformable pumping.
  • The developed ESP is suitable for untethered soft robotic applications.
  • This technology advances the capabilities of soft robotic locomotion and fluid handling.