基于势流理论和OpenFOAM的耦合模型对多向不规则波浪的模拟

基于势流理论的数值水池可以快速计算波浪的传播及其对建筑物的作用， 但是势流理论是基于波浪的无黏性假设的， 而在工程中， 通常需要在固体边界及波浪破碎的区域考虑黏性效应。针对基于求解Ｎａｖｉｅｒ⁃Ｓｔｏｋｅｓ 方程的黏性水池计算量较大、速度较慢的缺点， 采用耦合的方法模拟多向不规则波浪的传播， 即在外域通过基于势流理论的数值水池产生多向不规则波浪， 内域采用求解Ｎａｖｉｅｒ⁃Ｓｔｏｋｅｓ 方程和流体体积法（ＶＯＦ 方法）对自由表面进行追踪， 通过外域所提供的边界波浪， 内域计算可以在较小区域进行计算， 从而达到减少计算量、提高计算效率的目的 The numerical wave tank based on the potential theory simulates the wave progression and wave-structure interaction quickly, but it is based on the assumption of non-viscous.

In reality, viscous effects are always considered at solid boundaries and wave-broken areas. For the viscous numerical wave basin based on solving the Navier-Stokes equation, however, it has the insufficient of large amount of calculation. Currently, the coupling method is used to simulate wave progression to reduce the amount of calculation and enhance the efficiency.

In the outer domain, multidirectional irregular waves are generated from potential theory, and in the inner domain, the Navier-Stokes equation is solved in combination the VOF method to track the free surface.