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ID:43487090
大小:2.96 MB
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时间:2019-10-08
《不同湍流模式下钱塘江涌潮水流三维模拟_汪求顺》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第35卷第1期海洋工程Vol.35No.12017年1月THEOCEANENGINEERINGJan.2017文章编号:1005-9865(2017)01-0080-10不同湍流模式下钱塘江涌潮水流三维模拟1,2,31,2,3汪求顺,潘存鸿(1.浙江省水利河口研究院,浙江杭州310020;2.浙江省海洋规划设计研究院,浙江杭州310020;3.浙江省河口海岸重点实验室,浙江杭州310016)摘要:钱塘江涌潮具有动力作用强和流速变化快等特点。涌潮水流紊动复杂,流速的垂向分布和紊动强度息息相关。通过涌潮水流实测资料的分析可以发
2、现,涌潮作用下流速垂向分布在底部和上层存在差异。为研究涌潮作用下流速垂向分布的特征,应用基于非结构网格下有限体积法模型FVCOM对钱塘江涌潮河段水流运动进行三维数值模拟。考虑到涌潮紊动作用复杂且对流速的垂向分布起着重要影响,采用不同的湍流模式对涌潮传播过程中水流的运动特征开展研究。通过与涌潮河段实测资料的验证,复演涌潮到达前后水流运动特征,给出涌潮水流湍动能的变化过程。研究成果有助于深入认识涌潮水流紊动特征和流速的分布规律,为涌潮作用下物质输运的研究提供基础。关键词:涌潮;三维模拟;湍动能;钱塘江河口;FVCOM中图分类号
3、:TV148文献标志码:ADOI:10.16483/j.issn.1005-9865.2017.01.009Three-dimensionalsimulationoftidalboreintheQiantangestuaryunderdifferentturbulencemodels1,2,31,2,3WANGQiushun,PANCunhong(1.ZhejiangInstituteofHydraulicsandEstuary,Hangzhou310020,China;2.ZhejiangInstituteofMarin
4、ePlanningandDesign,Hangzhou310020,China;3.KeyLaboratoryofEstuarineandCoastofZhejiangProvince,Hangzhou310016,China)Abstract:ThetidalboreintheQiantangestuaryhasthecharacteristicsofintensehydrodynamicsandrapid-variationvelocity.Theturbulenceoftidalboresiscomplicated,
5、andturbulenceintensityiscloselyrelevanttotheverticaldistributionofvelocity.Itisfoundthatthedistributionofthevelocityalongthewaterdepthisdifferentatthebottomandthetoplayersunderthetidalborebytheanalysisofthefielddata.Thisstudyistosimulatethethree-dimensionalfeature
6、ofthetidalboreintheQiantangestuarybasedontheunstructuredgridsfinite-volumemethodFVCOMmodelsoastoinvestigatethedistributionofvelocityalongthewaterdepth.Astheturbulenceofthetidalboreiscomplicatedanditplaysanimportantroleinthedistributionofvelocity,thetidalflowsarest
7、udiedduringthepropagationoftidalboresbydifferentturbulencemodels.Themovementoftheflowisreproducedbeforeandafterthearrivaloftidalboresbythecalibrationwiththemeasureddata,thetime-varyingprocessofturbulentkineticenergyisexhibited.Thepresentresultsarehelpfultodeepenth
8、eunderstandingofturbulencecharacteristicsandthedistributionofvelocity,anditwillprovideabasisforthestudyofmasstransport.Keywords:tidalbore;3Dsimulation;t
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