基于SPH方法的孤立波数值模拟

Numerical Simulation of Solitary Waves Based on SPH Method

文中应用DualSPHysics开源代码平台,基于Goring理论采用推板造波方法构建二维数值造孤立波水槽,探究粒子间距D p对数值模拟孤立波的影响.采用6种粒子间距D p分别对2种波高的孤立波进行了数值模拟,显示了2个监测点处数值模拟与解析解的波形对比,计算和分析了不同D p下、4个监测点处的波高与理论波高的误差.结果表明:粒子间距D p=0.01 m时数值模拟精度较高同时计算耗时较少,并将此种粒子间距D p的数值模拟结果与物理试验测量结果进行了对比,二者吻合程度好.

Using the open source code platform of DualSPHysics,based on Goring theory,a two-dimensional numerical solitary wave tank was constructed by using the push-plate wave-making method,and the influence of particle spacing D p on numerical simulation solitary waves was explored.The solitary waves with two wave heights were numerically simulated by using six kinds of particle spacing D p,and the waveforms of numerical simulation and analytical solution at two monitoring points were compared.The errors between wave heights and theoretical wave heights at four monitoring points under different D p were calculated and analyzed.The results show that the numerical simulation accuracy is higher and the calculation time is less when the particle spacing D p=0.01 m,and the numerical simulation results of this particle spacing D p are compared with the physical test results,and they are in good agreement.