This article has been focused on the analysis of changes in friction force as well as coefficient of friction of slide journal bearing in terms of the concentration of magnetic particles in the lubricating ferro-oil. There has been present an analytical and numerical calculation model based on experimentally determined physical quantities describing the dependence of ferro-oil’s viscosity on fundamental parameters such as temperature, pressure or external magnetic field in the paper. Numerical calculations of the dimensionless friction force as well as the dimensionless friction coefficient were performed by solving the Reynold’s type equation using the finite difference method using Mathcad 15 and own calculation procedures. The obtained results has been presented in the form of a series of graphs that take into account: the influence of external magnetic field, corrections related to the influence of pressure changes, corrections related to the influence of temperature changes and finally corrections related to non-Newtonian ferro-oil properties. An analysis of the obtained characteristics has been made so the observations and conclusions were drawn regarding optimum magnetic particle content in the ferro-oil lubricating the sliding journal bearing
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 Frycz M. The research and modeling of dynamic viscosity of ferro-oilswith different concentration of magnetic particles in the aspect of pressure changes Tribologia (in press) 2017.
 Frycz M. The ferro-oils viscosity depended simultaneously on the temperature and magnetic oil particles concentration η=η(Tϕ) – part I Journal of KONES Powertrain and Transport Vol. 23 No. 2 pp.113-120 2016.
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 Frycz M. Czaban A. Models of viscosity characteristics η=η(B) of ferro-oil with different concentration of magnetic particles in the presence of external magnetic field Journal of KONES Powertrain and Transport Vol. 21 No. 4 pp. 119-126 2014.
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