| Efficient computation method for two-dimensional nonlinear waves |
| |
| 作者姓名： | Wang Ke Kang Haigui |
| |
| 作者单位： | State Key Laboratory of Ocean & Offshore, Department of Civil Engineering, Dalian University of Technology,Dalian 116023, China
|
| |
| 摘 要： | I~IOWNUmerics wave tank is a ~ tOOl by which variouS nonlinear wave - ac interactionpwhleln can be treated in time domain. As the face stage, we f~ our efforts on the devious of an effita saution tee~ of fully nofor waves. aam numtried of water - wavesconnected PwhlemS, es~ in a wave tank, is alwayS comas Of PartS: wave generation, P~ and a~. The effi~ Of a nUm~ wave tankdepends not Only on the qwhty Of the wave abotion tecboaue, which allowS the lOng times~ and keePS finite tank leng…
|
| 关 键 词： | Numerical wave tank piston-type wave-maker sponge layer beach |
| 收稿时间： | 2000/7/13 0:00:00 |
| 修稿时间： | 2000/12/7 0:00:00 |
Efficient computation method for two-dimensional nonlinear waves |
| |
| Wang Ke,Kang Haigui.Efficient computation method for two-dimensional nonlinear waves[J].Acta Oceanologica Sinica,2001,20(2):281-297. |
| |
| Authors: | Wang Ke and Kang Haigui |
| |
| Institution: | State Key Laboratory of Ocean & Offshore, Department of Civil Engineering, Dalian University of Technology, Dalian 116023, China |
| |
| Abstract: | The theory and simulation of fully-nonlinear waves in a truncated two-dimensional wave tank in time domain are presented. A piston-type wave-maker is used to generate gravity waves into the tank field in finite water depth. A damping zone is added in front of the wave-maker which makes it become one kind of absorbing wave-maker and ensures the prescribed Neumann condition. The efficiency of numerical tank is further enhanced by installation of a sponge layer beach (SLB) in front of downtank to absorb longer weak waves that leak through the entire wave train front. Assume potential flow, the space- periodic irrotational surface waves can be represented by mixed Euler-lagrange particles Solving the integral equation at each time step for new normal velocities, the instantaneous free surface is integrated following time history by use of fourth-order Runge- Kutta method. The double node technique is used to deal with geometric discontinuity at the wave- body intersections. Several precise smoothing methods have been introduced to treat surface point with high curvature. No saw-tooth like instability is observed during the total simulation. The advantage of proposed wave tank has been verified by comparing with linear theoretical solution and other nonlinear results, excellent agreement in the whole range of frequencies of interest has been obtained. |
| |
| Keywords: | Numerical wave tank piston-type wave-maker sponge layer beach |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
