Abstract
In this work, we present a measurement system based on the thin layer of magnetic fluid aimed at scanning either the non-uniform magnetic field distribution applicable for magnetic levitation systems (MagLev) or determining small excess gas pressure. The key idea is based on the photo registration of a transparent air-filled cavity formed in a thin magnetic fluid layer due to balancing the gas pressure and the pressure emerging due to magnetic forces. As a result, the contour of the magnetic field lines in 3D space is visible. It is shown that the theoretical analysis and numerical simulations are consistent with experimental results.
Highlights
Ring magnet systems creating a sufficiently non-uniform axially-symmetric magnetic field attract actual recent attention in application to various fields of developing measuring devices and technical constructions
Systems of magnetic levitation (MagLev) aimed at the contactless manipulation by nonmagnetic objects immersed in a para-and superparamagnetic media may be listed
Magnetic fluid was used as a contactless transmitter from the pressure cell to a microbalance even in the celebrated pressure measuring device,7 the more sophisticated realizations are of the recent demand
Summary
Ring magnet systems creating a sufficiently non-uniform axially-symmetric magnetic field attract actual recent attention in application to various fields of developing measuring devices and technical constructions. Magnetic fluids (MF) enhances the effect and used as a part of sensitive sensors and pressure-controlling components for microfluidic transport devices.. Magnetic fluids (MF) enhances the effect and used as a part of sensitive sensors and pressure-controlling components for microfluidic transport devices.3,4 Another particular application area of MF–based systems is devices for measuring vapour pressures at low temperatures that is crucially important for the development of equations of state and represents a complicated technical problem when the partial pressures of interest are sufficiently low that the ambient atmospheric one.. The main goal of the present work is a further elaboration of the setup proposed in the work aimed at: i) its improvement, which allows the usage as a sensitive gas pressure meter, and ii) introducing and validating a computational procedure for calculating the force fields quantifying the registered data with respect to the device’s purposes
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