Experimental studies of a ferrofluid ring in a valve mode
Source abstract
Abstract
In this paper, a novel ferrofluid valve is proposed. The structure is free of mechanical moving parts and is based on a ferrofluid ring. The valve opening is created by a small leakage channel in the ferrofluid ring. The control of the valve is achieved through a magnetic field produced by an electromagnet. This type of valve can operate in a fast-opening mode and can also have characteristics similar to a check valve. It closes itself when the upstream and downstream pressure differential is below a critical value. The aim of the research is to determine the basic flow characteristics and the value of the current in the electromagnet at which the valve opens. The measured pressure/flow response was found to be linear up to the maximum pressure of 25 kPa and the flow rate of 0.87 L/min for all four different ferrofluids used in these experiments. The degree of valve opening was not higher than 2.5%. The overall analysis of the data shows that, in general, ferrofluids of high magnetization values and low viscosity are the preferred choice for the valve application.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microfluidic and Bio-sensing Technologies · Characterization and Applications of Magnetic Nanoparticles · Microfluidic and Capillary Electrophoresis Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Study of audio speakers containing ferrofluid10.1088/0953-8984/20/20/204147 ↗
2. Investigation of hydrodynamic clutch with a magnetorheological fluid10.1177/1045389X18803463 ↗
3. P. Gas, E. Kurgan, Cooling effects inside water-cooled inductors for magnetic fluid hyperthermia, 2017 Progress in Applied Electrical Engineering (PAEE). (2017) 1-4, https://doi.org/10.1109/PAEE.2017.8008997.10.1109/PAEE.2017.8008997 ↗
4. Critical review: magnetism in microfluidic chips10.1039/B513005K ↗
5. Micro-magnetofluidics: interactions between magnetism and fluid flow on the microscale
6. A rotating permanent magnetic actuator for micropumping devices with magnetic nanofluids10.1088/1361-6439/ab8dd1 ↗
7. A ferrofluidic magnetic micropump10.1109/84.925748 ↗
8. A microchannel immunoassay chip with ferrofluid actuation to enhance the biochemical reaction10.1016/j.snb.2013.03.078 ↗
9. J. Ahn, JG. Oh., B. Choi, A novel type of a microfluidic system using ferrofluids for an application of μ-TAS. Microsyst. Technol. 10, (2004) 622–627. https://doi.org/10.1007/s00542-003-0340-9.10.1007/s00542-003-0340-9 ↗
10. A Stepper Micropump for Ferrofluid Driven Microfluidic Systems10.2174/1876402910901010017 ↗
11. Plastic micropump with ferrofluidic actuation10.1109/JMEMS.2004.839007 ↗
12. The “One drop” ferrofluidic pump with analog control10.1016/j.sna.2009.05.006 ↗
13. A novel implantable glaucoma valve using ferrofluid10.1371/journal.pone.0067404 ↗
14. Ferrofluid-based microchip pump and valve10.1016/j.snb.2004.01.016 ↗
15. Ferrofluid valve operated by the magnetic field of a straight current-carrying wire10.18502/keg.v3i4.2225 ↗
16. Diffuser miniature pump with an extra ferrofluidic valve10.1007/s10404-015-1642-9 ↗
17. The influence of the temperature rise on the sealing performance of the rotating magnetic fluid seal10.1109/TMAG.2020.3023018 ↗
18. Miniature magnetic fluid seal working in liquid environments10.1016/j.jmmm.2016.09.032 ↗
19. Simulation and experimental study on pressure transfer mechanism in multi-teeth magnetic fluid seals
20. Influence of selected parameters on the reseal instability mechanism in magnetic fluid seals10.4283/JMAG.2019.24.1.032 ↗
21. The loss of continuity in a liquid ring formed by a magnetic fluid10.1109/TMAG.2019.2916322 ↗
22. Experimental validation and numerical simulation of static pressure in multi-stage ferrofluid seals