赵西增^*

（  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CIP(Constrained Interpolation Profile)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，离散了N-S (Navier-Stokes)方程，通过多相流理论描述了水-气的相互作用，采用VOF(Volume of Fluid)类型的高精度THINC(tangent of hyperbola for interface capturing)自由面捕捉方法改进了传统的数学模型，更加准确地重构了自由水面。重点分析了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： 波浪理论；多相流;CIP方法；冲击压力；THINC方法

Zhao Xizeng^*

（  Ocean College,Zhejiang University；  ）

Abstract： 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 CIP-based method as the main flow solver, combined with a VOF typed scheme, THINC (tangent of hyperbola for interface capturing), 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.
Keywords： Water wave; multi-phase flow; CIP method; impact pressure; THINC method

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