| Author | Piyadasa, Palliya Guruge Ranjith Chandra |
| Call Number | AIT Thesis no. WA-83-10 |
| Subject(s) | Tidal currents
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Profiles .of tidal current , shear stress and eddy viscosity are interrelated concepts which are important in the design and construction of coastal engineering projects. Under the action of the tides, the flow becomes turbulent and the problem becomes more difficult to solve due to the lack of
knowledge of appropriate profiles of velocity or shear stress. This study is devoted to the determination of suitable profiles of velocity, shear stress
and eddy viscosity under tidal action. The tide is a superposition of several constituents. I n order to study
the phenomena it is decomposed to different constituents. For analytical
purposes these constituents can be considered as simple harmonics with t heir own periods, magnitudes and phases. The first two harmonics, namely diurnal and semidiurnal, are significant in the case of 24-hr period o f observations. Assuming t he exponential law
for the velocity distribution of each constituent, the profiles of shear stress, friction factor and eddy viscosity profile were determined in terms of velocity profile parameters m and n, and phase profile parameters r and c . For the long waves value of r becomes zero. Hence the phase angle can be considered as a constant. Accordingly, the simplified expressions for shear stress, friction factor and eddy viscosity can be obtained. |
| Year | 1982 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Suphat Vongvisessomjai |
| Examination Committee(s) | Arbhabhirama Anat ; Tawatchai Tingsanchali |
| Scholarship Donor(s) | The Royal Danish Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1982 |