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CFD Feasibility of oil flow around a bearing ball-raceway contact with Star-CCM+©

Nguyen, M.D. (2017) CFD Feasibility of oil flow around a bearing ball-raceway contact with Star-CCM+©.

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Abstract:New challenges in rolling element bearing design are continuously raised not only because of stringent operational and environment requirement but also a strain for more accurate results to classical problems in bearing design such as service life, fatigue life, etc. The two sources of challenges are also often compounded. One classical and critical problem is film formation inside a lubricated contact which is well-predicted with Reynolds model in a so-called fully flooded limit. However, the lapse in knowledge about flow and redistribution of lubrication around the contact impedes the accuracy for film formation prediction in strict situation such as starvation. This study presents an effort to solve three-dimensional problem of oil flow around a single ball bearing-raceway contact by means of Computational Fluid Dynamics (CFD) with the “closing contact” assumption, i.e., the domain isolates the flow through the contact. The effort is also made to resolve the large-scale variation of geometry and numerical accuracy. The numerical solutions demonstrate the capability of CFD to predict the flow pattern transition. Uncertainty estimation in sensitivity analysis of the results quantifies the extent to which the CFD setup can accurately predict the pattern. The results from this analysis suggest a promising progress toward establishing the CFD results in this study as a robust tool in the design process for rolling element bearing.
Item Type:Internship Report (Master)
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Keywords:CFD, Tribology, EHL, Starvation, Free surface flow, Interface-capturing method
Link to this item:http://purl.utwente.nl/essays/84030
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