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ID:36668409
大小:4.11 MB
页数:13页
时间:2019-05-13
《《absorbing–generatingseawardboundaryconditionsforfully-coupledhydro-morphodynamicalsolvers.》》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、CoastalEngineering99(2015)96–108ContentslistsavailableatScienceDirectCoastalEngineeringjournalhomepage:www.elsevier.com/locate/coastalengAbsorbing–generatingseawardboundaryconditionsforfully-coupledhydro-morphodynamicalsolversGiorgioIncelli⁎,RiccardoBriganti,NicholasDoddUniversityofNottingham,U
2、niversityPark,NottinghamNG72RD,UKarticleinfoabstractArticlehistory:Thispaperpresentsanewtechniquetocomputeopenboundaryconditionsforfully-coupledhydro-Received20October2014morphodynamicalnumericalsolversbasedontheNon-LinearShallowWaterandtheExnerequations.TheseReceivedinrevisedform2February2015c
3、onditionsallowthegenerationofincidentsignalsandtheabsorptionofreflectedones,takingintoaccountAccepted3February2015thebedevolutionattheboundary.TheyusetheapproximationsforlinearwavesinshallowwaterandareAvailableonline24February2015basedonthesolutionoftheRiemannEquations.Theproposedtechniqueisimpl
4、ementedinthefully-coupledhydro-morphodynamicalnumericalmodelofKeywords:Fully-coupledmorphodynamicsBrigantietal.(2012a).OpenboundaryFirstly,thegenerationandabsorptionofsinglemonochromaticwavesarestudiedtoquantifytheerroraftertheAbsorbing-generatingboundaryconditionsreflectedwaveexitedthedomain.In
5、allcasestheerrorisalwayssmall,givingevidenceoftheeffectivenessoftheNon-LinearShallowWaterEquationsnewseawardboundaryconditions.ExnerequationFurthermore,thepropagationandreflectionofamonochromaticwavetrainoveramobilebedareconsidered.Bothflowevolutionandbedchangearenotaffectedbyspuriousoscillations
6、whenlongsequencesofwavesaretested.Additionally,averylowmobilitybedisconsideredtosimulatea‘virtuallyfixed’bedandnewbound-aryconditionresultsconsistentlyconvergetothoseforthehydrodynamiconlycase.Finally,thereflectionofauniformboreoveramobilebedisstudied.ForthiscasetheRankine–Hugoniotcondi-tionsprov
7、ideananalyticalsolution.Itisapparentthattheadoptedlinearapproximationsproduceerrorsinthevelocityestimates.Nevertheless,theconditionsperformreasonablywelleveninthisdemandingnon-linearcase.©2015ElsevierB.V.Allrightsreserved.1.Introd
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