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Proposing Institution

Lehrstuhl für Maschinenelemente,TUM
Project Manager

Dr.-Ing. Michael Otto
Boltzmannstr. 15
85748 Garching
The lubricated contact of teeth in power transmission is designated as a thermal elastohydrodynamically lubricated (TEHL) contact. Thereby, lubricant separates both driving contact surfaces by elastic deformation and the hydrodynamic buildup of a lubricant film. Currently, these contacts are investigated by means of TEHL simulations including the coupling of linear elasticity equation, hydrodynamic equation, energy conservation equation and lubricants rheological properties. The major challenge in calculating TEHL contacts is the resolution of the hydrodynamic equations, due to viscosity variations over several decimal powers. Hence, typically the Navier Stokes equations, which shows high computational effort during resolution, were simplified to generalized Reynolds equations. The applied assumptions of Reynolds equation are not generally applicable to all operation conditions. Therefore, TEHL simulation models are currently dealing with the resolution of the Navier Stokes equation.
The aim of this project is to simulate the TEHL contact by means of the resolution of the Navier Stokes equation and compare the results with results obtained by Reynolds equations. Thereby, the simulation software ANSYS FLUENT is used.

Impressum, Conny Wendler