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Free-surface flows over submerged obstacles |
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| รหัสดีโอไอ | |
| Title | Free-surface flows over submerged obstacles |
| Creator | Panat Guayjarernpanishk |
| Contributor | Jack Asavanant |
| Publisher | Chulalongkorn University |
| Publication Year | 2551 |
| Keyword | Surfaces (Physics), Fluids, Boundary element methods |
| Abstract | We consider free-surface flows over submerged obstacles under the effects of gravity and surface tension. The fluid is treated as inviscid and incompressible. The flow is assumed to be steady, two-dimensional, and irrotational. The flow is characterized by the following parameters: Froude number F, Bond number Bo, distance between the obstacles x[subscript d], and height of the obstacles hob. Fully nonlinear problem is solved numerically by using the boundary integral equation technique. After the discretization, we obtain a system of nonlinear algebraic equations which can be solved by the Newton’s method. In addition, the weakly nonlinear problem of steady and time-dependent flows are investigated and compared with the fully nonlinear results. In this thesis, special case of flows over a single obstacle is summarized in the solution diagram of (F, hob)-plane for bump(hob > 0) and dip (hob < 0). New family of solutions of free-surface flows over two obstacles are proposed. |
| URL Website | cuir.car.chula.ac.th |
