A Novel Approach for Modeling Surface Effects in Hydrodynamic Lubrication
AbstractThe common approach for the flow factor calculation is based on using the Reynolds equation to simulate the micro-level flow. However, for structured surfaces the fluid flow cannot be represented correctly, due to the assumptions made when deriving the Reynolds equation. In this work, a novel method using the Navier-Stokes equations for the calculation of the micro-level flow is presented and validated against results from Patir and Cheng. The three-dimensional lubrication gap was generated by a rough Gaussian random surface and a perfectly smooth moving counter surface, in order to be available for different numerical methods. The presented results illustrate similar trends for both the approaches. Additionally, the use of the Navier-Stokes equations allows for the observance of surface induced effects which cannot be resolved by the approach of Patir and Cheng. Furthermore, a numerical approach for a shear flow factor calculation with a rough moving surface is presented and validated against other simulation methods. While the validation is maintained with pressure- and temperature-independent density and viscosity, these effects will be taken into account for later research activities of textured surfaces. View Full-Text
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Pusterhofer, M.; Bergmann, P.; Summer, F.; Grün, F.; Brand, C. A Novel Approach for Modeling Surface Effects in Hydrodynamic Lubrication. Lubricants 2018, 6, 27.
Pusterhofer M, Bergmann P, Summer F, Grün F, Brand C. A Novel Approach for Modeling Surface Effects in Hydrodynamic Lubrication. Lubricants. 2018; 6(1):27.Chicago/Turabian Style
Pusterhofer, Michael; Bergmann, Philipp; Summer, Florian; Grün, Florian; Brand, Clemens. 2018. "A Novel Approach for Modeling Surface Effects in Hydrodynamic Lubrication." Lubricants 6, no. 1: 27.
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