Experiments on exactly computing non-linear energy transfer rate in MASNUM-WAM

• Published in: Chinese journal of oceanology and limnology Vol. 34; no. 4; pp. 821 - 834
• Main Author: 江兴杰 王道龙 高大鲁 张婷婷
• Format: Journal Article
• Language: English
• Published: Heidelberg Science Press 01.07.2016; Springer Nature B.V
• Subjects: Computation; Earth and Environmental Science; Earth Sciences; Energy transfer; equations; geometry; Linear energy transfer (LET); Marine; Mathematical models; Oceanography; Oceans; Physics; Scaling; Wave power; Waveform analysis; 数值实验; 模型求解; 程序开发; 精确计算方法; 线性能量传递; 试验; 转移率; 非线性; the WRT method; MASNUM-WAM; geometric scaling; nonlinear energy transfer
• ISSN: 0254-4059; 2096-5508; 1993-5005; 2523-3521
• DOI: 10.1007/s00343-016-5007-3

The Webb-Resio-Tracy（WRT） method for exact computation of the non-linear energy transfer rate was implemented in MASNUM-WAM, which is a third-generation wave model solving the discrete spectral balance equation. In this paper, we describe the transformation of the spectral space in the original WRT method. Four numerical procedures were developed in which the acceleration techniques in the original WRT method, such as geometric scaling, pre-calculating, and grid-searching, are all reorganized. A series of numerical experiments including two simulations based on real data were performed. The availability of such implementation in both serial and parallel versions of the wave model was proved, and a comparison of computation times showed that some of the developed procedures provided good effi cacy. With exact computation of non-linear energy transfer, MASNUM-WAM now can be used to perform numerical experiments for research purposes, which augurs well for further developments of the model.