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Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging
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Magnetic Field Deflects Water Jet.

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Summary

A permanent magnetic field deflected a water jet, demonstrating diamagnetic repulsion. This study provides experimental and theoretical insights into magnetic field interactions with water.

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Area of Science:

  • Physics
  • Fluid Dynamics
  • Magnetohydrodynamics

Background:

  • Water exhibits diamagnetic properties, meaning it is weakly repelled by magnetic fields.
  • Understanding fluid behavior in magnetic fields is crucial for various scientific and industrial applications.

Purpose of the Study:

  • To experimentally and theoretically investigate the deflection of a vertically falling water jet by a permanent magnetic field.
  • To quantify the angular deflection and explore the underlying physical principles.

Main Methods:

  • A vertically falling water jet (diameter 1.1 ± 0.05 mm) was subjected to a magnetic field (0.63 ± 0.03 T) from a neodymium magnet.
  • Experimental measurements of angular deflection were correlated with theoretical models of magnetic force on diamagnetic materials.

Main Results:

  • An average angular deflection of approximately 5.0 × 10⁻³ rad (0.3°) was observed.
  • The deflection is attributed to a bulk force pushing the diamagnetic water out of the gradient magnetic field.
  • A semiquantitative theory was developed, showing satisfactory agreement with experimental results.

Conclusions:

  • The study confirms the diamagnetic repulsion of water in a gradient magnetic field.
  • The findings provide a foundation for potential applications leveraging magnetic forces on water jets.