Influences of topographic variations of the offshore fringing reef on the harbor oscillations excited by incident Nwaves with different amplitudes and waveform types are studied for the first time.Both the propagation...Influences of topographic variations of the offshore fringing reef on the harbor oscillations excited by incident Nwaves with different amplitudes and waveform types are studied for the first time.Both the propagation of the Nwaves over the reef and the subsequently-induced harbor oscillations are simulated by a Boussinesq-type numerical model,FUNWAVE-TVD.The present study concentrates on revealing the influences of the plane reef-face slope,the reef-face profile shape and the lagoon width on the maximum runup,the wave energy distribution and the total wave energy within the harbor.It shows that both the wave energy distribution uniformity and the total wave energy gradually increase with decreasing reef-face slope.The profile shape of the reef face suffering leading-elevation Nwaves(LEN waves)has a negligible impact on the wave energy distribution uniformity,while for leading-depression N-waves(LDN waves),the latter gradually decreases with the mean water depth over the reef face.The total wave energy always first increases and then decreases with the mean water depth over the reef face.In general,the total wave energy first sharply decreases and then slightly increases with the lagoon width,regardless of the reef-face width and the incident waveform type.The maximum runup subjected to the LEN waves decreases monotonously with the lagoon width.However,for the LDN waves,its changing trend with the lagoon width relies on the incident wave amplitude.展开更多
文献[1,2]进行了数值波浪水池波浪环境的模拟、规则波顶浪中船舶水动力的计算以及船舶辐射问题的模拟。文章在其基础上,基于N-S方程,对规则波中顶浪前进的Wigley船模运动进行了模拟。数值模拟的船模运动结果与DUT(Delft University of T...文献[1,2]进行了数值波浪水池波浪环境的模拟、规则波顶浪中船舶水动力的计算以及船舶辐射问题的模拟。文章在其基础上,基于N-S方程,对规则波中顶浪前进的Wigley船模运动进行了模拟。数值模拟的船模运动结果与DUT(Delft University of Technology)的试验数据进行了比较、分析,二者符合较好。文中与文献[1,2]的研究工作一起,初步构建了真正意义上的基于N-S方程的数值波浪水池。展开更多
基金financially supported by the National Key Research and Development Program of China(Grant No.2017YFC1404200)the National Natural Science Foundation of China(Grant Nos.51911530205 and 51809039)+5 种基金the Natural Science Foundation of Jiangsu Province(Grant No.BK20201455)the Natural Science Foundation of the Jiangsu Higher Education Institutions(Grant No.20KJD170005)the Qing Lan Project of Jiangsu Universitiessupported by UK EPSRC(Grant No.EP/T026782/1)the Royal Academy of Engineering(Grant No.UK-CIAPP/73)the Royal Society(Grant No.IEC\NSFC\181321)。
文摘Influences of topographic variations of the offshore fringing reef on the harbor oscillations excited by incident Nwaves with different amplitudes and waveform types are studied for the first time.Both the propagation of the Nwaves over the reef and the subsequently-induced harbor oscillations are simulated by a Boussinesq-type numerical model,FUNWAVE-TVD.The present study concentrates on revealing the influences of the plane reef-face slope,the reef-face profile shape and the lagoon width on the maximum runup,the wave energy distribution and the total wave energy within the harbor.It shows that both the wave energy distribution uniformity and the total wave energy gradually increase with decreasing reef-face slope.The profile shape of the reef face suffering leading-elevation Nwaves(LEN waves)has a negligible impact on the wave energy distribution uniformity,while for leading-depression N-waves(LDN waves),the latter gradually decreases with the mean water depth over the reef face.The total wave energy always first increases and then decreases with the mean water depth over the reef face.In general,the total wave energy first sharply decreases and then slightly increases with the lagoon width,regardless of the reef-face width and the incident waveform type.The maximum runup subjected to the LEN waves decreases monotonously with the lagoon width.However,for the LDN waves,its changing trend with the lagoon width relies on the incident wave amplitude.
文摘文献[1,2]进行了数值波浪水池波浪环境的模拟、规则波顶浪中船舶水动力的计算以及船舶辐射问题的模拟。文章在其基础上,基于N-S方程,对规则波中顶浪前进的Wigley船模运动进行了模拟。数值模拟的船模运动结果与DUT(Delft University of Technology)的试验数据进行了比较、分析,二者符合较好。文中与文献[1,2]的研究工作一起,初步构建了真正意义上的基于N-S方程的数值波浪水池。
文摘近年来,数值波浪水槽在海洋工程研究中发挥着越来越为重要的作用,成为了水波动力学研究的焦点之一。为此,基于Navier-Stokes(N-S)方程组,首先完成了二维数值波浪水槽的构建。对于N-S方程,采用FVM(Finite Volume Method)法进行离散求解;在入口边界处,模拟活塞推板运动产生了入射波;同时,利用VOF(Volume of Fluid)法对波浪自由面进行了捕捉;在数值波浪水槽尾部,通过设置人工阻尼区实现了消波。利用该二维数值波浪水槽,对典型非线性二阶Stokes波进行了仿真模拟,通过设置虚拟波高监测仪,获取了非线性二阶Stokes波发生、发展和消亡的全过程。对比校验表明,所有仿真结果均与理论精确解相吻合。
