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Keywords: computational fluid dynamics
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Journal Articles
Article Type: Research Papers
J. Tribol. May 2021, 143(5): 051113.
Paper No: TRIB-21-1120
Published Online: May 6, 2021
... particles called a primitive. A computational fluid dynamics framework is proposed to directly simulate the capillary and hydrodynamic effects of the interfacial flow that is responsible for primitive formation. The computational model uses the volume-of-fluid method for capturing dynamic binder-air...
Journal Articles
Article Type: Research Papers
J. Tribol. March 2020, 142(3): 031801.
Paper No: TRIB-19-1237
Published Online: November 18, 2019
... computational fluid dynamics bearing design and technology fluid film lubrication hydrodynamic lubrication One well-known effect of hydrodynamic journal bearings in rotating systems is the fluid-induced instability that represents an undesirable phenomenon in the system due to its destructive...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2011, 133(4): 041702.
Published Online: October 14, 2011
... Devices,” Ph.D. thesis, National University of Singapore, Singapore. 31 03 2011 25 07 2011 12 08 2011 14 10 2011 14 10 2011 computational fluid dynamics friction genetic algorithms machine bearings micromotors minimisation Navier-Stokes equations numerical...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2011, 133(2): 021702.
Published Online: March 18, 2011
... as well as programming effort for the solution of the compressible-fluid Reynolds equation. 30 08 2010 20 11 2010 18 03 2011 18 03 2011 compressible flow computational fluid dynamics conjugate gradient methods differential equations Newton method Reynolds equation...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2010, 132(1): 011104.
Published Online: December 10, 2009
... of the three-dimensional, single-phase flow between a stationary and a rotating clutch plate is presented, which is capable of describing pressures and shear stress distribution for plates with radial grooved geometries. The computational fluid dynamics code FLUENT ® is used to examine the single-phase...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2010, 132(1): 011801.
Published Online: November 10, 2009
... and continuous phases to the total lubricant pressure and pressure gradient are functions of the oil concentration and the film thickness. The parameters used in these functions are determined by a series of computational fluid dynamics simulations. The onset of inversion and the viscosity after inversion...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2009, 131(1): 011702.
Published Online: December 2, 2008
... computational fluid dynamics finite element analysis flow simulation Reynolds equation fluid film theory hydrodynamic journal bearing Jakobsson–Floberg–Olsson (JFO) boundary conditions moving mesh arbitrary Lagrangian–Eulerian (ALE) The arbitrary Lagrangian–Eulerian (ALE) method ( 1...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2009, 131(1): 012201.
Published Online: December 2, 2008
... to be zero everywhere in the domain. The simulation then begins stepping though time. Each of the time steps involves an update of the slurry velocity field (performed using the integrated computational fluid dynamic (CFD) solver, described below): a calculation of the contact stress distribution between...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2009, 131(1): 011704.
Published Online: December 2, 2008
... in the vicinity of bearing walls. negative squeeze behavior vaporization bubble dynamics Rayleigh–Plesset equation bubbles cavitation compressibility compressible flow computational fluid dynamics fracture liquid films lubrication vaporisation 24 01 2008 29 08 2008 02 12...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2009, 131(1): 012001.
Published Online: November 26, 2008
... can be expected. However, such disk velocities are not applied in modern hard disk drives and were not considered in this study. 03 06 2007 11 07 2008 26 11 2008 computational fluid dynamics disc drives hard discs magnetic heads magnetic recording microchannel flow Monte...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2008, 130(4): 041503.
Published Online: August 5, 2008
...Markus Hartinger; Marie-Laure Dumont; Stathis Ioannides; David Gosman; Hugh Spikes In this paper a computational fluid dynamics (CFD) approach for solving elastohydrodynamic lubrication using the freely available package OPENFOAM is introduced. The full Navier–Stokes equations are solved, which...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2008, 130(2): 021701.
Published Online: April 7, 2008
... without incurring incoming recirculating flow. The wall profile shape controlling the velocity profile can be optimized for many hydrodynamic contacts. 02 02 2007 19 09 2007 07 04 2008 computational fluid dynamics hydrodynamics laminar flow machine bearings surface texture...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2008, 130(1): 011001.
Published Online: December 6, 2007
... bearing and, together with bearing force models, yields a criterion for whirl instability onset. Detailed three-dimensional computational fluid dynamics calculations of the journal bearing flow have been conducted to assess the criterion. A singular behavior in whirl ratio as a function of the reduced...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2007, 129(2): 384–390.
Published Online: December 11, 2006
... to be established. However, it is very difficult to obtain the detailed information about the flow structure from flow visualization because of a very thin bearing clearance. Therefore, we calculated the flow field using computational fluid dynamics, which can solve the Navier-Stokes equations directly...
Journal Articles
Article Type: Technical Briefs
J. Tribol. April 2007, 129(2): 424–429.
Published Online: October 20, 2006
...Gocha Chochua; Thomas A. Soulas A method is proposed for computations of rotordynamic coefficients of deliberately roughened stator gas annular seals using computational fluid dynamics. The method is based on a transient analysis with deforming mesh. Frequency-dependent direct and cross-coupled...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2007, 129(1): 129–134.
Published Online: September 18, 2006
...Adnan Al-Ghasem, Ph.D. Candidate; G. L. Morrison; John P. Platt, Jr. The effectiveness of a computational fluid dynamics (CFD) commercial code to accurately predict the leakage rate for a windback seal was evaluated. The windback seal under consideration has a rectangular cavity and is similar...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2007, 129(1): 120–128.
Published Online: June 27, 2006
... computational fluid dynamics seals (stoppers) turbulence flow simulation Couette flow laminar flow sealing materials mechanical seal flow field CFD K−ε turbulence model fractional approach method The most practical and common method for preventing process fluid (sometimes hazardous) from...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2006, 128(2): 422–430.
Published Online: September 19, 2005
.... Increasing clearance results in reduction of these gradients and hence the torque reduces as well. To verify the model, results were obtained from the computational fluid dynamics package FLUENT that satisfies the full Navier-Stokes equations. As a result, we need additional boundary conditions...
Journal Articles
Article Type: Technical Briefs
J. Tribol. October 2005, 127(4): 899–902.
Published Online: June 13, 2005
... perturbation theory shapes (structures) friction computational fluid dynamics New fabrication methods such as indentation, chemical etching, micromachining, laser ablation, LIGA processes, etc., have recently become available for lubricated devices. Such methods allow for the detailed texturing...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2005, 127(4): 820–825.
Published Online: May 26, 2005
... bearing performance. 13 01 2005 26 05 2005 machine bearings slip friction lubrication computational fluid dynamics The behavior of conventional journal bearings is determined by the classical Reynolds equation, which governs the fluid pressure distribution in the lubricating...