Title: Simulation of radial journal bearings using the FSI approach and a multi-phase model with integrated cavitation

Authors: M. Geller; C. Schemmann; N. Kluck

Addresses: Department of Mechanical Engineering, University of Applied Sciences and Arts Dortmund, Sonnenstr. 96, 44139 Dortmund, Germany ' Department of Mechanical Engineering, University of Applied Sciences and Arts Dortmund, Sonnenstr. 96, 44139 Dortmund, Germany ' Department of Mechanical Engineering, University of Applied Sciences and Arts Dortmund, Sonnenstr. 96, 44139 Dortmund, Germany

Abstract: Journal bearings are an essential component in mechanical engineering. While the fundamental functional principle is well known, the internal processes in a bearing and the complex interactions between lubrication film and bearing structure have hitherto not been fully researched. Traditionally journal bearing analysis is carried out by special simulation codes based on lubrication theory or use of the Reynolds equation. To take phenomena such as turbulence, cavitation or heat transfer into account, empirical and numerical models are integrated into the calculations. These codes have proven to be efficient and sufficiently accurate for fundamental bearing analysis but are also subject to certain limitations in that they do not allow visualisation of physical phenomena such as cavitation, recirculation or elastohydrodynamic effects in complex geometries. This paper presents an approach based on state of the art numerical fluid structure interaction (FSI) methods. Application of three dimensional computational fluid dynamics (CFD) and finite element methods (FEM) allows the analysis of arbitrary bearing geometries. Furthermore, this approach also permits a detailed analysis of flow phenomena inside the bearing.

Keywords: radial journal bearings; cavitation; hydrodynamic lubrication; elastohydrodynamic effect; multiphase flows; fluid structure interaction; FSI; gap flows; absorption; desorption; 3D modelling; computational fluid dynamics; CFD; finite element method; FEM; arbitrary bearing geometries.

DOI: 10.1504/PCFD.2014.059196

Progress in Computational Fluid Dynamics, An International Journal, 2014 Vol.14 No.1, pp.14 - 23

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 07 Feb 2014 *

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