| Author | Pinlac, Esterlito M. |
| Call Number | AIT Thesis no.WA-85-45 |
| Subject(s) | Diffusion in hydrology
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | An experimental study was undertaken to investigate the mechanism of diffusion of a co-flow sediment-laden water jet discharged in a rectangular open channel. The width-to-depth ratios were selected not lesser than 15 to assure a depth-averaged condition. The range of Reynolds numbers were high to correspond to hydraulically rough conditions and the range of Froude numbers of flow was within 0.2 and 0.1 which is typical for large rivers. Results of the runs using bigger particles, such as gypsum. The effect of roughness was also investigated. The basic data showed that that the transverse concentration distribution across the jet essentially follows a Gaussian curve. The centerline concentration Cm decays along the distance x at the rate m, in which m is a function of sediment concentration and flow conditions while the standard deviation 0 of the Gaussian curve varies parabolically along x within the range of experiments. Results from this study agree with the findings of other investigators regarding: (1) the settling of sediment has very little effect on diffusion but controls mainly the decay of centerline concentration; and (2) turbulent diffusion mainly generated from bed roughness governs the rate of mixing of sediment particles with the ambient flow. |
| Year | 1985 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Tawatchai Tingsanchali |
| Examination Committee(s) | Suphat Vongvisessomjai ;Wang, Tsan-Wen ;Prida Thimakorn |
| Scholarship Donor(s) | Royal Thai Government (King's) |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1985 |