Application of a wall function to simulate turbulent flows in foil bearings at high rotational speeds

Qin, Kan, Gollan, Rowan J. and Jahn, Ingo H. (2017) Application of a wall function to simulate turbulent flows in foil bearings at high rotational speeds. Tribology International, 115 546-556. doi:10.1016/j.triboint.2017.06.018


Author Qin, Kan
Gollan, Rowan J.
Jahn, Ingo H.
Title Application of a wall function to simulate turbulent flows in foil bearings at high rotational speeds
Journal name Tribology International   Check publisher's open access policy
ISSN 0301-679X
1879-2464
Publication date 2017-11-01
Sub-type Article (original research)
DOI 10.1016/j.triboint.2017.06.018
Open Access Status Not yet assessed
Volume 115
Start page 546
End page 556
Total pages 11
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
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.
Keyword Checker-boarding
Foil thrust bearings
Turbulent simulation
Wall function
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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