Application of a wall function to simulate turbulent flows in foil bearings at high rotational speeds
Article
Article Title | Application of a wall function to simulate turbulent flows in foil bearings at high rotational speeds |
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ERA Journal ID | 3721 |
Article Category | Article |
Authors | Qin, Kan, Gollan, Rowan J. and Jahn, Ingo H. |
Journal Title | Tribology International |
Journal Citation | 115, pp. 546-556 |
Number of Pages | 11 |
Year | 2017 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0301-679X |
1879-2464 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.triboint.2017.06.018 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0301679X17303067 |
Abstract | For turbulent simulations in hydrodynamic applications, a fine mesh close to wall boundaries is required to correctly predict the friction and heat fluxes. This results in a remarkable increase of computational cost due to the high aspect ratio cells and reduced allowable time step. To reduce the computational cost, a compressible wall function is introduced and validated with the representative flows. Moreover, high aspect ratio cells lead to simulation instabilities. These spurious oscillations are smoothed through the addition of a fourth-order artificial dissipation term. To verify that the solution accuracy is not affected, the method of manufactured solution is applied. These two additions result in a fast and stable solver for turbulent simulations of foil thrust bearings. |
Keywords | Foil thrust bearings; Turbulent simulation; Checker-boarding; Wall function |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 4012. Fluid mechanics and thermal engineering |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
https://research.usq.edu.au/item/z2172/application-of-a-wall-function-to-simulate-turbulent-flows-in-foil-bearings-at-high-rotational-speeds
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