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波浪对钱塘江古海塘墙体作用的CIP方法模拟

发表时间:2016-10-31  浏览量:1275  下载量:265
全部作者: 赵西增
作者单位: 浙江大学海洋学院
摘 要: 针对钱塘江古海塘的破坏现状和当地的水动力条件,基于紧致插值(constrained interpolation profile,CIP)方法建立多相流数学模型,开展波浪对墙体作用的立面二维数值模拟研究,重点分析作用过程中的冲击压力和流场特性。模型在直角坐标下建模,以高阶差分CIP方法为流场基本求解器,离散纳维斯托克斯(N-S)方程,通过多相流理论描述水-气的相互作用,采用流体体积(volume of fluid,VOF)函数类型的高精度双曲正切函数(tangent of hyperbola for interface capturing,THINC)自由面捕捉方法改进传统的数学模型,更加准确地重构了自由水面。重点分析波浪对墙体的冲击压力,并通过与实验结果的比较,验证了结果的正确性。计算结果对开展海塘墙体防护工作具有重要意义。
关 键 词: 海洋工程;多相流;紧致插值方法;冲击压力;高精度双曲正切函数方法
Title: Numerical study of wave impact on the ancient seawall along Qiantang River using CIP-based method
Author: ZHAO Xizeng
Organization: Ocean College, Zhejiang University
Abstract: Two dimensional numerical simulation of wave impact on the ancient seawall along Qiantang River is carried out according to the wall’s current condition and local wave conditions. Main attention is paid to the impact pressure and velocity field. The numerical model is developed through the constrained interpolation profile (CIP) based method as the main flow solver of the Navier-Stokes equation, combined with a more accurate volume of fluid (VOF) typed scheme, tangent of hyperbola for interface capturing (THINC), as the free surface capturing method. The multiphase model is used to treat the water-air-solid interactions. Computational results are compared with the experimental data and a good agreement is found. It is concluded that the calculated results are fit for evaluating seawall structure safety.
Key words: ocean engineering; multi-phase flow; constrained interpolation profile method; impact pressure; tangent of hyperbola for interface capturing method
发表期数: 2016年10月第20期
引用格式: 赵西增. 波浪对钱塘江古海塘墙体作用的CIP方法模拟[J]. 中国科技论文在线精品论文,2016,9(20):2141-2150.
 
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