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Theoretical Analysis of A Buoyant Jet Interacting with Small Amplitude Waves 被引量:5
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作者 Ying-Pin LIN Hung-Chu HSU Yang-Yih CHEN 《China Ocean Engineering》 SCIE EI 2009年第1期73-84,共12页
A new theoretical solution is presented here for the dynamic characteristics of a buoyant jet due to opposing small amplitude waves. The conservation equations of mass, tangential moment^n and vertical momentum are so... A new theoretical solution is presented here for the dynamic characteristics of a buoyant jet due to opposing small amplitude waves. The conservation equations of mass, tangential moment^n and vertical momentum are solved by the integral method which encompasses the Gaussian profiles of velocity and density. The action of waves is incorporated into the equations of motion as an external force and a new exact solution is obtained to predict the trajectory, velocity distribution and boundary thickness of the buoyant jet over an arbitrary lateral cross section. It is found that the velocity along the centerline is inversely proportional to the ratio of the momentum of the wave to the buoyant jet. The averaged bound- ary width varies with the fluctuation of the boundary width, the distance from the orifice and the velocity correction function. Owing to the motion of waves, the fluctuation of the boundary width is proportional to the wave steepness. 展开更多
关键词 buoyant jet small amplitude waves radiation stress jet trajectory
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Organizing Filament of Small Amplitude Scroll Waves 被引量:1
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作者 ZHOUTian-Shou ZHANGSuo-Chun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2001年第6期657-660,共4页
We theoretically analyze the organizing filament of small amplitude scroll waves in general excitable media by perturbation method and explicitly give the expressions of coefficients in Keener theory. In particular fo... We theoretically analyze the organizing filament of small amplitude scroll waves in general excitable media by perturbation method and explicitly give the expressions of coefficients in Keener theory. In particular for the excitable media with equal diffusion, we obtain a close system for the motion of the filament. With an example of the Oregonator model, our results are in good agreement with those simulated by Winfree. 展开更多
关键词 excitable media small amplitude scroll wave organizing filament perturbation method CURVATURE TORSION
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Third-order Stokes wave solutions for interfacial internal waves in a three-layer density-stratified fluid
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作者 陈小刚 郭志萍 +4 位作者 宋金宝 赫晓东 郭军明 包曙红 崔巍 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第5期1906-1916,共11页
Interracial internal waves in a three-layer density-stratified fluid are investigated using a singular perturbation method, and third-order asymptotic solutions of the velocity potentials and third-order Stokes wave s... Interracial internal waves in a three-layer density-stratified fluid are investigated using a singular perturbation method, and third-order asymptotic solutions of the velocity potentials and third-order Stokes wave solutions of the associated elevations of the interfacial waves are presented based on the small amplitude wave theory. As expected, the third-order solutions describe the third-order nonlinear modification and the third-order nonlinear interactions between the interracial waves. The wave velocity depends on not only the wave number and the depth of each layer but also on the wave amplitude. 展开更多
关键词 three-layer density-stratified fluid interracial internal waves third-order Stokes wavesolutions small amplitude wave theory
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CFD-Based Load Calculation Method for Monopile Support Configuration of Offshore Wind Turbine
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作者 Guo Tongqing Tong Xiaolong Lu Zhiliang 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2016年第1期88-94,共7页
An unsteady load calculation method for the support configuration of a monopile-supported offshore wind turbine is developed based on the Fluent software platform.Firstly,the water wave is generated by imposing the in... An unsteady load calculation method for the support configuration of a monopile-supported offshore wind turbine is developed based on the Fluent software platform.Firstly,the water wave is generated by imposing the inlet boundary conditions according to the exact potential flow solution.Then the wave evolution is simulated by solving the unsteady incompressible Navier-Stokes(N-S)equations coupled with the volume of fluid method.For the small amplitude wave with reasonable wave parameters,the numerical wave result agrees well with that of the given wave model.Finally,a monopile support configuration is introduced and a CFD-based load calculation method is established to accurately calculate the unsteady load under the combined action of wave and wind.The computed unsteady wave load on a small-size monopile support located in the small amplitude wave flow coincides with that of the Morison formula.The load calculations are also performed on a large-size monopile support and a monopile-supported offshore wind turbine under the combined action of small amplitude wave and wind. 展开更多
关键词 monopile-supported offshore wind turbine Navier-Stokes(N-S)equations volume of fluid(VOF) method small amplitude wave unsteady load
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