Effect of the magnetic particles concentration on the ferro-oil’s dynamic viscosity in presence of an external magnetic field in the aspect of shear rate’s variations

• Autorzy: Frycz M. , Horak W.
• Języki publikacji: EN

Abstrakty

EN

The purpose of this study is to determine the effect of changes in the concentration of magnetic particles in ferrooil to change its physical properties, in particular the dynamic viscosity in a constant external magnetic field in terms of changes in shear rate and changes in the intensity of that field. Rheological studies were carried out on Physica MCR 301 rheometer in the “plate -plate” measurement system with an adapter to magneto-rheological studies MRD 180/1T. The applied adapter enable to obtain almost homogeneous distribution of magnetic field strength. Thermal stabilization was carried out by a water jacket in a closed chamber and controlling the nature of the magnetic field was conducted by current’s changes. Tests were performed for shear rate’s changes from 0 to 1000 1/s as regards changes an external magnetic field intensity 0–700 mT. The selected concentrations of magnetic particles in a ferro-oil were 1, 2, 4, 6 and 8% and the tested ferrofluid was product of FerroTec of Unterensingen (Germany), which is a mixture of colloidal mineral motor oil Penzzoil’s LongLife Gold's SAE 15W-40 with Fe3O4 magnetic particles and the surfactant. The paper presents, in the form of graphs, the changes of ferro-oil’s dynamic viscosity as a function of shear rate and concentration of magnetic particles in the aspect of external magnetic field’s intensity changes. The results of research were also subjected to analysis. The obtained characteristics of ferro-oil’s viscosity show clear evidence of non-Newtonian properties of the liquids. There is observed progression of these properties with increasing of magnetic particles concentration. This fact indicates the essential effect of the addition mentioned particles to the change of the ferro-oil’s viscosity characteristics.

Słowa kluczowe

EN

ferro-oil; dynamic viscosity; magnetic particles concentration; rheometer; slide journal bearings

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 3
• Strony: 139--144
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Frycz M.

• Maritime University Gdynia Faculty of Marine Engineering Morska Street 83, 81-225 Gdynia, Poland tel.: [phone], fax: [phone]

autor

Horak W.

• AGH University of Science and Technology, Faculty of Mechanical Engineering and Robotics Mickiewicza Av. 30, 30-059 Krakow, Poland tel.: [phone]

Bibliografia

• [1] Beran, E., Wpływ budowy chemicznej bazowych olejów smarowych na ich biodegradowalność i wybrane właściwości eksploatacyjne, Prace Naukowe Wydziału Chemicznego Politechniki Wrocławskiej, Wrocław 2008.
• [2] Frycz, M., Effects of Concentration of Magnetic Particles on Ferrooil’s Dynamic Viscosity as a Function of Temperature and Shear Rate, Journal of KONES Powertrain and Transport, Vol. 19, No. 2, pp. 159-165, 2012.
• [3] Melzner, K., Fleischer, J., Odenbach, S., New Developments in the Investigation of Magnetoviscous and Viscoelastic Effects in Magnetic Fluids, Magnetohydrodynamics, Vol. 37, No. 3, pp. 285-290, 2001.
• [4] Miszczak, A., Tribological Properties of Ferro-Oil, Journal of Friction and Wear, Vol. 27, No. 3, pp. 330-336, Bialoruska Akademia Nauk, Minsk 2006.
• [5] Odenbach, S., Ferroluids-Magnetically Controlled Suspensions, Colloids and Surfaces A: Physicochem, Eng. Aspects, Vol. 217, pp. 171-178, 2003.
• [6] Pytko, S., Wierzcholski, K., Magnetohydrodynamic Contact Between Two Elastic Roller, Wear, No. 65, pp. 285-293, 1981.
• [7] Spur, G., Uhlmann, E., Patzwald, R., Rheometer for Investigating the Magnetoviscous Effect of Magnetic Fluids, Magnetohydrodynamics, Vol. 37, No. 3, pp. 279-284, 2001.
• [8] Zubarev, A. Yu., Odenbach, S., Fleischer, J., Rheological Properties of Dense Ferrofluids, Journal of Magnetism and Magnetic Materials, Vol. 252, pp. 241-243, 2002.