Please use this identifier to cite or link to this item:
https://scholarbank.nus.edu.sg/handle/10635/66343
DC Field | Value | |
---|---|---|
dc.title | Turbulent velocity profiles in sediment-laden flows | |
dc.contributor.author | Guo, J. | |
dc.contributor.author | Julien, P.Y. | |
dc.date.accessioned | 2014-06-17T08:27:03Z | |
dc.date.available | 2014-06-17T08:27:03Z | |
dc.date.issued | 2001 | |
dc.identifier.citation | Guo, J.,Julien, P.Y. (2001). Turbulent velocity profiles in sediment-laden flows. Journal of Hydraulic Research 39 (1) : 11-23. ScholarBank@NUS Repository. | |
dc.identifier.issn | 00221686 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/66343 | |
dc.description.abstract | A theoretical analysis shows that velocity profiles in sediment-laden flows are similar to those in clear water. The modified log-wake law, which is developed for clear water by Guo, is also valid in sediment-laden flows. The analysis of the effects of sediment suspension on turbulent kinetic energy and turbulent diffusion shows that: (1) sediment suspension increases mean flow energy loss; (2) sediment suspension weakens turbulent diffusion in the vertical direction and then increases velocity gradient; and (3) sediment suspension affects velocity profile in two ways: average concentration and density gradient. The comparison with narrow-channel laboratory data confirms the theoretical analysis and shows that: (1) the modified log-wake law agrees well with experimental data for sediment-laden flows; (2) both average concentration and density gradient reduce the von Karman constant; and (3) for a given width-depth ratio, sediment concentration slightly increases the wake strength while density gradient has little effect on it. In addition, the modified log-wake law can reproduce experimental data where the maximum velocity occurs below the water surface. | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | CIVIL ENGINEERING | |
dc.description.sourcetitle | Journal of Hydraulic Research | |
dc.description.volume | 39 | |
dc.description.issue | 1 | |
dc.description.page | 11-23 | |
dc.identifier.isiut | NOT_IN_WOS | |
Appears in Collections: | Staff Publications |
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