Reynolds Boundary Condition Approximation in Journal Bearings Based on Dynamic Mesh Method
This paper proposed a new approach to Reynolds boundary condition approximation in journal bearing CFD analysis. Dynamic mesh method was applied to approach the location where the rupture of oil film or cavitation started. A numerical model of half bearing geometry was constructed to obtain the Half...
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Japanese Society of Tribologists
2021
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oai:doaj.org-article:8dd39cd7d11a4bb6920a5714edbcb1bd2021-11-05T09:31:04ZReynolds Boundary Condition Approximation in Journal Bearings Based on Dynamic Mesh Method1881-219810.2474/trol.16.81https://doaj.org/article/8dd39cd7d11a4bb6920a5714edbcb1bd2021-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/16/2/16_81/_pdf/-char/enhttps://doaj.org/toc/1881-2198This paper proposed a new approach to Reynolds boundary condition approximation in journal bearing CFD analysis. Dynamic mesh method was applied to approach the location where the rupture of oil film or cavitation started. A numerical model of half bearing geometry was constructed to obtain the Half-Sommerfeld solution. Using the solution, a pseudo-transient analysis was subsequently conducted. The boundary at the minimum film thickness was treated as the moving boundary. The Reynolds boundary condition was satisfied at a certain point when the pressure derivative of boundary nodes approached zero over the course of mesh growth. The analytical results were compared against the results of published works. It was discovered that the resulting cavitation angle and oil film pressure were consistent with those obtained by taking the Reynolds equation approach, with only slight differences observed from those obtained via the cavitation experiments and models. The proposed method is an extension of Reynolds boundary condition according to the CFD approach. It is considered an alternative to other cavitation models intended for journal bearings.Wanjun XuYongwei TianYing SongMingjie ZhangJiangang YangJapanese Society of Tribologistsarticlejournal bearingreynolds boundary conditioncavitationdynamic meshbearing analysisPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 16, Iss 2, Pp 81-88 (2021) |
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DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
journal bearing reynolds boundary condition cavitation dynamic mesh bearing analysis Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 |
| spellingShingle |
journal bearing reynolds boundary condition cavitation dynamic mesh bearing analysis Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Wanjun Xu Yongwei Tian Ying Song Mingjie Zhang Jiangang Yang Reynolds Boundary Condition Approximation in Journal Bearings Based on Dynamic Mesh Method |
| description |
This paper proposed a new approach to Reynolds boundary condition approximation in journal bearing CFD analysis. Dynamic mesh method was applied to approach the location where the rupture of oil film or cavitation started. A numerical model of half bearing geometry was constructed to obtain the Half-Sommerfeld solution. Using the solution, a pseudo-transient analysis was subsequently conducted. The boundary at the minimum film thickness was treated as the moving boundary. The Reynolds boundary condition was satisfied at a certain point when the pressure derivative of boundary nodes approached zero over the course of mesh growth. The analytical results were compared against the results of published works. It was discovered that the resulting cavitation angle and oil film pressure were consistent with those obtained by taking the Reynolds equation approach, with only slight differences observed from those obtained via the cavitation experiments and models. The proposed method is an extension of Reynolds boundary condition according to the CFD approach. It is considered an alternative to other cavitation models intended for journal bearings. |
| format |
article |
| author |
Wanjun Xu Yongwei Tian Ying Song Mingjie Zhang Jiangang Yang |
| author_facet |
Wanjun Xu Yongwei Tian Ying Song Mingjie Zhang Jiangang Yang |
| author_sort |
Wanjun Xu |
| title |
Reynolds Boundary Condition Approximation in Journal Bearings Based on Dynamic Mesh Method |
| title_short |
Reynolds Boundary Condition Approximation in Journal Bearings Based on Dynamic Mesh Method |
| title_full |
Reynolds Boundary Condition Approximation in Journal Bearings Based on Dynamic Mesh Method |
| title_fullStr |
Reynolds Boundary Condition Approximation in Journal Bearings Based on Dynamic Mesh Method |
| title_full_unstemmed |
Reynolds Boundary Condition Approximation in Journal Bearings Based on Dynamic Mesh Method |
| title_sort |
reynolds boundary condition approximation in journal bearings based on dynamic mesh method |
| publisher |
Japanese Society of Tribologists |
| publishDate |
2021 |
| url |
https://doaj.org/article/8dd39cd7d11a4bb6920a5714edbcb1bd |
| work_keys_str_mv |
AT wanjunxu reynoldsboundaryconditionapproximationinjournalbearingsbasedondynamicmeshmethod AT yongweitian reynoldsboundaryconditionapproximationinjournalbearingsbasedondynamicmeshmethod AT yingsong reynoldsboundaryconditionapproximationinjournalbearingsbasedondynamicmeshmethod AT mingjiezhang reynoldsboundaryconditionapproximationinjournalbearingsbasedondynamicmeshmethod AT jiangangyang reynoldsboundaryconditionapproximationinjournalbearingsbasedondynamicmeshmethod |
| _version_ |
1718444302609154048 |