内孤立波数值造波方法及其与理论和实验结果的比较

为评估不同内孤立波数值造波方法,本文基于Kd V、m Kd V和e Kd V三种理论模型,分别采用双推板、平板拍击和速度入射边界三种数值造波方法,对内孤立波进行了模拟,并将数值模拟结果与理论及实验结果进行对比和分析。结果表明:三种数值造波方法均能实现对内孤立波的模拟,但在造波效果及效率方面存在差异。速度入射边界法在造波效果及效率方面都比较好;平板拍击法的造波效果较好,效率略差;双推板法在造波效果及效率方面均略劣于以上两种方法。

COMPARISON OF NUMERICAL WAVE-GENERATING METHODS FOR INTERNAL SOLITARY WAVES WITH THEORETICAL AND EXPERIMENTAL RESULTS

To evaluate three numerical wave-generating methods, i.e., the double push-pedals method, moving pedal method, and velocity-inlet boundary method, based on three theoretical models, KdV, mKdV, and eKdV, we simulated the internal solitary wave with the three methods, and compared the results with corresponding theoretical and experimental ones. Results show that the three methods can realize the numerical simulation of internal solitary wave, but the effect and efficiency are different. Velocity-inlet boundary method performs best in both effect and efficiency. Moving pedal method has good effect, but slightly less efficient and double push-pedals method is slightly worse in both effect and efficiency.