Szczegóły publikacji
Opis bibliograficzny
Grasping the behavior of magnetorheological fluids in gradient pinch mode via microscopic imaging / Michal Kubík, Jiří Žáček, Janusz Gołdasz, David Nečas, Michal Sedlačík, Jiří Blahuta, Wojciech Bańkosz, Bogdan SAPIŃSKI // Physics of Fluids ; ISSN 1070-6631. — 2024 — vol. 36 iss. 4 art. no. 042004, s. 042004-1–042004-10. — Bibliogr. s. 042004-9–042004-10, Abstr. — Publikacja dostępna online od: 2024-04-03
Autorzy (8)
- Kubík Michal
- Žáček Jiří
- Gołdasz Janusz
- Nečas David
- Sedlačík Michal
- Blahuta Jiří
- Bańkosz Wojciech
- AGHSapiński Bogdan
Dane bibliometryczne
| ID BaDAP | 152683 |
|---|---|
| Data dodania do BaDAP | 2024-04-26 |
| Tekst źródłowy | URL |
| DOI | 10.1063/5.0203804 |
| Rok publikacji | 2024 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physics of Fluids |
Abstract
Magnetorheological (MR) fluids are suspensions of micrometer-sized ferromagnetic particles in a carrier fluid, which react to magnetic fields. The fluids can be operated in several fundamental modes. Contrary to the other modes, the rheology and microstructure formation of the MR fluid in the gradient pinch mode have been studied to a far lesser extent. The magnetic field distribution in the flow channel is intentionally made non-uniform. It is hypothesized that the Venturi-like contraction is achieved via fluid property changes, leading to a unique behavior and the presence of a pseudo-orifice. The main goal is to investigate the presence of the Venturi-like contraction effect in the fluid by means of optical imaging and hydraulic measurements. To accomplish the goal, a unique test rig has been developed including a fluorescence microscope and MR valve prototype. The Venturi-like contraction hypothesis was confirmed. The results indicate that the effective flow channel size decreases by 92% at the maximum magnetic flux applied. This has a direct impact on the flow characteristics of the MR valve. The variation of the pressure–flow rate curve slope with magnetic field was demonstrated. The results provide valuable information for understanding the rheology and microstructure formation mechanism in MR fluids in the pinch mode.
