A. Thess, E. V. Votyakov
We describe a noncontact technique for velocity measurement in electrically conducting fluids, termed Lorentz force velocimetry (LFV). The objective is to provide a solution for measuring flow velocity in high-temperature melts, such as metals and glass, which traditional methods struggle to address due to electrode corrosion. The methodology involves exposing the fluid to a magnetic field and measuring the drag force on magnetic field lines. We conducted two series of experiments: one to determine the force through the angular velocity of a rotary magnet system, and the other to measure the force on a fixed magnet system directly. The results confirm that the measured signal is a linear function of flow velocity, and we derive a scaling law that relates the force on a localized distribution of magnetized material to fluid velocity. The implications of this work suggest that LFV could have wide applications in industries like metallurgy, semiconductor crystal growth, and glass manufacturing.
@article{a9c0bdd5-f2ba-4367-b733-01c189a9ff75,
title={Lorentz Force Velocimetry},
author={A. Thess and E. V. Votyakov},
year={2026},
language={en}
}TY - JOUR TI - Lorentz Force Velocimetry AU - A. Thess AU - E. V. Votyakov PY - 2026 LA - en ER -
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