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Updated: Dec 23, 2025

Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
3D motion of flexible ferromagnetic filaments under a rotating magnetic field
Abdelqader Zaben1, Guntars Kitenbergs1, Andrejs Cēbers1
1MMML Lab, University of Latvia, Jelgavas 3, Riga, LV-1004, Latvia. andrejs.cebers@lu.lv.
Abstract:
Ferromagnetic filaments in a rotating magnetic field are studied both numerically and experimentally. The filaments are made from micron-sized ferromagnetic particles linked with DNA strands. It is found that at low frequencies of the rotating field, a filament rotates synchronously with the field and beyond a critical frequency, it undergoes a transition to a three dimensional regime. In this regime the tips of the filament rotate synchronously with the field on circular trajectories in the plane parallel to the plane of the rotating field. The characteristics of this motion found numerically match the experimental data and allow us to obtain the physical properties of such filaments. We also discuss the differences in behaviour between magnetic rods and filaments and the applicability of filaments in mixing.
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