Formulas for friction factor in transitional regimes
This note concerns variations of the friction factor in the two transitional regimes, one between laminar and turbulent flows and the other between fully smooth and fully rough turbulent flows. An interpolation approach is developed to derive a single explicit formula for computing the friction fact...
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | Journal Article |
| Idioma: | English |
| Publicado em: |
2012
|
| Assuntos: | |
| Acesso em linha: | https://hdl.handle.net/10356/93959 http://hdl.handle.net/10220/7647 |
| _version_ | 1826119206903480320 |
|---|---|
| author | Cheng, Nian-Sheng |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Cheng, Nian-Sheng |
| author_sort | Cheng, Nian-Sheng |
| collection | NTU |
| description | This note concerns variations of the friction factor in the two transitional regimes, one between laminar and turbulent flows and the other between fully smooth and fully rough turbulent flows. An interpolation approach is developed to derive a single explicit formula for computing the friction factor in all flow regimes. The results obtained for pipe flows give a better representation of Nikuradse's experimental data, in comparison with other implicit formulas available in the literature. Certain modifications are also made for applying the obtained friction formula to open-channel flows. |
| first_indexed | 2024-10-01T04:56:23Z |
| format | Journal Article |
| id | ntu-10356/93959 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:56:23Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | ntu-10356/939592020-03-07T11:43:40Z Formulas for friction factor in transitional regimes Cheng, Nian-Sheng School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering This note concerns variations of the friction factor in the two transitional regimes, one between laminar and turbulent flows and the other between fully smooth and fully rough turbulent flows. An interpolation approach is developed to derive a single explicit formula for computing the friction factor in all flow regimes. The results obtained for pipe flows give a better representation of Nikuradse's experimental data, in comparison with other implicit formulas available in the literature. Certain modifications are also made for applying the obtained friction formula to open-channel flows. Accepted version 2012-03-21T08:39:43Z 2019-12-06T18:48:30Z 2012-03-21T08:39:43Z 2019-12-06T18:48:30Z 2008 2008 Journal Article Cheng, N. S. (2008). Formulas for Friction Factor in Transitional Regimes. Journal of Hydraulic Engineering, 134(9), 1357-1362. 0733-9429 https://hdl.handle.net/10356/93959 http://hdl.handle.net/10220/7647 10.1061/(ASCE)0733-9429(2008)134:9(1357) en Journal of hydraulic engineering © 2008 ASCE. This is the author created version of a work that has been peer reviewed and accepted for publication byJournal of Hydraulic Engineering, Amemrican Society of Civil Engineers. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1061/(ASCE)0733-9429(2008)134:9(1357)] 23 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Civil engineering Cheng, Nian-Sheng Formulas for friction factor in transitional regimes |
| title | Formulas for friction factor in transitional regimes |
| title_full | Formulas for friction factor in transitional regimes |
| title_fullStr | Formulas for friction factor in transitional regimes |
| title_full_unstemmed | Formulas for friction factor in transitional regimes |
| title_short | Formulas for friction factor in transitional regimes |
| title_sort | formulas for friction factor in transitional regimes |
| topic | DRNTU::Engineering::Civil engineering |
| url | https://hdl.handle.net/10356/93959 http://hdl.handle.net/10220/7647 |
| work_keys_str_mv | AT chengniansheng formulasforfrictionfactorintransitionalregimes |