欢迎来到天天文库
浏览记录
ID:54367726
大小:1.04 MB
页数:7页
时间:2020-04-29
《内孤立波与直立圆柱体相互作用特性数值模拟.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第36卷第1期哈尔滨工程大学学报Vol.36№.12015年1月JournalofHarbinEngineeringUniversityJan.2015内孤立波与直立圆柱体相互作用特性数值模拟121王旭,林忠义,尤云祥(1.上海交通大学海洋工程国家重点实验室,上海200240;2.嘉兴南洋职业技术学院,浙江嘉兴314003)摘要:为研究直立圆柱体的内孤立波载荷特性,依据三类内孤立波理论(KdV、eKdV和MCC)的适用性条件,使用内孤立波诱导上下层深度平均水平速度作为入口条件,采用Navier⁃Stokes方程为流场控制方程,建立了
2、两层流体中内孤立波对直立圆柱体强非线性作用的数值模拟方法。系列计算结果表明,数值模拟所得内孤立波波形及其振幅与相应理论和实验结果一致,并且直立圆柱体内孤立波水平力、垂向力及其力矩数值模拟结果与实验结果吻合。直立圆柱体内孤立波载荷由波浪压差力、粘性压差力和摩擦力构成,其中摩擦力很小,可以忽略;对水平力,其波浪压差力与粘性压差力量级相当,流体粘性的影响显著;对垂向力,粘性压差力很小,流体粘性影响可以忽略。关键词:两层流体;内孤立波;直立圆柱体;载荷特性;数值模拟doi:10.3969/j.issn.1006⁃7043.201310010
3、网络出版地址:http://www.cnki.net/kcms/doi/10.3969/j.issn.1006⁃7043.201310010.html中图分类号:P751文献标志码:A文章编号:1006⁃7043(2015)01⁃006⁃06Numericalsimulationfortheinteractioncharacteristicsofinternalsolitarywaveswithaverticalcircularcylinder121WANGXu,LINZhongyi,YOUYunxiang(1.StateKeyLa
4、boratoryofOceanEngineering,ShanghaiJiaotongUniversity,Shanghai200240,China;2.SchoolofJiaxingNanyangProfessionandTechnology,Jiaxing314003,China)Abstract:Inordertoinvestigatethecharacteristicsofloadsontheverticalcircularcylinderduetointernalsolitarywavesanumericalmethodi
5、sstudied.AccordingtotheapplicabilityconditionsforthreetypesofinternalsolitarywavetheoriesincludingKdV,eKdVandMCC,anumericalmethodbasedontheNavier⁃Stokesequationinatwo⁃layerfluidispresentedtosimulatethestronglynonlinearinteractionofinternalsolitarywaveswithaverticalcirc
6、ularcylinder,wherethevelocity⁃inletboundaryisappliedbyuseofthedepth⁃averagedvelocitiesintheupper⁃andlow⁃er⁃layerfluidsinducedbytheinternalsolitarywave.Theresultshowedthatthewaveformandamplitudeoftheinter⁃nalsolitarywavebasedonthepresentnumericalmethodareingoodagreement
7、withtheexperimentalandtheoreticalresults.Numericalresultsforthehorizontalandverticalforces,aswellastorquesontheverticalcircularcylinderduetotheinternalsolitarywavearealsoingoodagreementwithexperimentalresults.Itisshownbyaseriesofcal⁃culationsthatthehorizontalandvertica
8、lforcesontheverticalcircularcylindercanbedividedintothreecompo⁃nents,includingthewaveandviscouspressureforcesduetosol
此文档下载收益归作者所有