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A NOVEL ADAPTIVE σ coordinate MODEL AND ITS APPLICATIONS TO WAVE AND STRUCTURE INTERACTION

Journal of Hydrodynamics 2012年第3期24卷 323-331页

作者： SU Xiao-hui ZOU De-gao ZHANG Jian-tao LESCHKA Stefan LIN Peng-zhi ZHANG Kai-lin School of Energy and Power Engineering Dalian University of Technology Dalian 116023 China Institute of Earthquake Engineering Dalian University of Technology Dalian 116024 China Institute of Water Resource and Hydropower Dalian University of Technology Dalian 116023 China DHI-NTU Water and Environment Research Center and Education Hub Singapore 760330 College of Water Resource and Hydropower Sichuan University Chengdu 610065 China

In this paper, a novel adaptive mesh σ coordinate model is proposed for the studies of Wave and Structure Interaction （WSI）. The model is validated by using the case of a solitary wave movement in an open channel with constant water depth and the case of nonbreaking solitary wave propagating over a step. Numerical results agree well with the analytical solutions obtained based on the Boussinesq theory, the laboratory data and other numerical model results. The proposed model is then used to study a solitary wave interacting with a suspended fixed structure.

关键词： adaptive mesh σ coordinate solitary wave wave structure interaction

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A VERTICAL 2-D NUMERICAL SIMULATION OF SUSPENDED SEDIMENT TRANSPORT

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Journal of Hydrodynamics 2007年第2期19卷 217-224页

作者： ZHANG Jing-xin LIU Hua Department Of Engineering Mechanics Shanghai Jiaotong University Shanghai 200240 China

Numerical simulation of sediment transport and bed evolution has become an important technique in the sediment research. In this article, a numerical model of suspended sediment transport was proposed, which was established in the vertical σ coordinate for fitting the free surface and bottom. In the research of the sediment transport, the predominant factors were found to be the eddy diffusion, the settling velocity, the bed condition and so on. By the aid of the model in the article, the contribution of the Rouse parameter to the vertical profile of sediment concentration was clarified, which was identical to the theoretical results. In the comparison of the numerical results with laboratory data, the agreement between experimental data and numerical results was reached except for some data. And the possible reasons for the disagreement were discussed.

关键词： suspended sediment transport 2-D numericalmodel σ coordinate

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