The damping model for sea waves covered by oil films of a finite thickness

作     者：ZHANG Yanmin ZHANG Jie WANG Yunhua MENG Junmin ZHANG Xi 

作者机构：The First Institute of OceanographyState Oceanic Administration College of Information Science and EngineeringOcean University of China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2015年第34卷第9期

页      面：71-77页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 0707[理学-海洋科学] 08[工学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：The Young Scientists Fund of the National Natural Science Foundation of China under contract No.41106153 China Postdoctoral Science Foundation Funded Project under contract No.2012M521293 

主　　题：sea surface wave oil film of finite thickness damping ratio 

摘      要：In combination with a wave action balance equation, a damping model for sea waves covered by oil films of a finite thickness is proposed. The damping model is not only related to the physical parameters of the oil film, but also related to environment parameters. Meanwhile, the parametric analyses have been also conducted to understand the sensitivity of the damping model to these parameters. And numerical simulations demonstrate that a kinematic viscosity, a surface/interfacial elasticity, a thickness, and a fractional filling factor cause more significant effects on a damping ratio than the other physical parameters of the oil film. From the simulation it is also found that the influences induced by a wind speed and a wind direction are also remarkable. On the other hand, for a thick emulsified oil film, the damping effect on the radar signal induced by the reduction of an effective dielectric constant should also be taken into account. The simulated results are compared with the damping ratio evaluated by the 15 ENVISAT ASAR images acquired during the Gulf of Mexico oil spill accident.