Effects of Viscosity Variation and Surface Roughness on the Couple stress Squeeze Film Characteristics of Short Journal Bearings
The theoretical analysis of the combined effects of surface roughness and viscosity variation on the couple stress squeeze film characteristics of short journal bearings is presented. The modified stochastic Reynold’s equation accounting for the viscosity variation of couple stresses fluid and rando...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Kragujevac
2015-03-01
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| Series: | Tribology in Industry |
| Subjects: | |
| Online Access: | http://www.tribology.fink.rs/journals/2015/2015-1/15.pdf |
| _version_ | 1819057316215914496 |
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| author | G.H. Ayyappa N.B. Naduvinamani A. Siddangouda S.N. Biradar |
| author_facet | G.H. Ayyappa N.B. Naduvinamani A. Siddangouda S.N. Biradar |
| author_sort | G.H. Ayyappa |
| collection | DOAJ |
| description | The theoretical analysis of the combined effects of surface roughness and viscosity variation on the couple stress squeeze film characteristics of short journal bearings is presented. The modified stochastic Reynold’s equation accounting for the viscosity variation of couple stresses fluid and randomized surface roughness structure on bearing surface is mathematically derived using the Christensen stochastic theory. It is observed that, the transverse roughness pattern improves the squeeze film characteristics whereas the bearing performance is affected due to the presence of one dimensional longitudinal surface roughness. Further, it is observed that, the effect of viscosity variation is to reduce the load carrying capacity and squeeze film time as compared to the case of constant viscosity. |
| first_indexed | 2024-12-21T13:37:22Z |
| format | Article |
| id | doaj.art-6f168073e9da49cbac9bbace23d7fe10 |
| institution | Directory Open Access Journal |
| issn | 0354-8996 2217-7965 |
| language | English |
| last_indexed | 2024-12-21T13:37:22Z |
| publishDate | 2015-03-01 |
| publisher | University of Kragujevac |
| record_format | Article |
| series | Tribology in Industry |
| spelling | doaj.art-6f168073e9da49cbac9bbace23d7fe102022-12-21T19:02:07ZengUniversity of KragujevacTribology in Industry0354-89962217-79652015-03-01371117127Effects of Viscosity Variation and Surface Roughness on the Couple stress Squeeze Film Characteristics of Short Journal BearingsG.H. Ayyappa0N.B. Naduvinamani1A. Siddangouda2S.N. Biradar3Department of Mathematics, Poojya Doddappa Appa College of Engineering, Kalaburagi, IndiaDepartment of Mathematics, Gulbarga Univesity, Kalaburagi, IndiaDepartment of Mathematics, Appa Institute of Engineering & Technology, Kalaburagi, IndiaDepartment of Mathematics, C.B. College, Bhalki, IndiaThe theoretical analysis of the combined effects of surface roughness and viscosity variation on the couple stress squeeze film characteristics of short journal bearings is presented. The modified stochastic Reynold’s equation accounting for the viscosity variation of couple stresses fluid and randomized surface roughness structure on bearing surface is mathematically derived using the Christensen stochastic theory. It is observed that, the transverse roughness pattern improves the squeeze film characteristics whereas the bearing performance is affected due to the presence of one dimensional longitudinal surface roughness. Further, it is observed that, the effect of viscosity variation is to reduce the load carrying capacity and squeeze film time as compared to the case of constant viscosity.http://www.tribology.fink.rs/journals/2015/2015-1/15.pdfShort Journal bearingSqueeze filmCouple stressViscosity variationRandomized roughness |
| spellingShingle | G.H. Ayyappa N.B. Naduvinamani A. Siddangouda S.N. Biradar Effects of Viscosity Variation and Surface Roughness on the Couple stress Squeeze Film Characteristics of Short Journal Bearings Tribology in Industry Short Journal bearing Squeeze film Couple stress Viscosity variation Randomized roughness |
| title | Effects of Viscosity Variation and Surface Roughness on the Couple stress Squeeze Film Characteristics of Short Journal Bearings |
| title_full | Effects of Viscosity Variation and Surface Roughness on the Couple stress Squeeze Film Characteristics of Short Journal Bearings |
| title_fullStr | Effects of Viscosity Variation and Surface Roughness on the Couple stress Squeeze Film Characteristics of Short Journal Bearings |
| title_full_unstemmed | Effects of Viscosity Variation and Surface Roughness on the Couple stress Squeeze Film Characteristics of Short Journal Bearings |
| title_short | Effects of Viscosity Variation and Surface Roughness on the Couple stress Squeeze Film Characteristics of Short Journal Bearings |
| title_sort | effects of viscosity variation and surface roughness on the couple stress squeeze film characteristics of short journal bearings |
| topic | Short Journal bearing Squeeze film Couple stress Viscosity variation Randomized roughness |
| url | http://www.tribology.fink.rs/journals/2015/2015-1/15.pdf |
| work_keys_str_mv | AT ghayyappa effectsofviscosityvariationandsurfaceroughnessonthecouplestresssqueezefilmcharacteristicsofshortjournalbearings AT nbnaduvinamani effectsofviscosityvariationandsurfaceroughnessonthecouplestresssqueezefilmcharacteristicsofshortjournalbearings AT asiddangouda effectsofviscosityvariationandsurfaceroughnessonthecouplestresssqueezefilmcharacteristicsofshortjournalbearings AT snbiradar effectsofviscosityvariationandsurfaceroughnessonthecouplestresssqueezefilmcharacteristicsofshortjournalbearings |