Backward Calculation Based on the Advection and Diffusion of Oil Spills on the Sea Surface-中国期刊网

摘要 Inthelightoftheproblemofoilpollutionbroughtaboutbyships,inthispaperwepresenttheconceptofbackwardtracingoilspills.Inthecourseofbackwardcalculationofthetwo-dimensionalconvection&diffusionequation,ontheonehand,theadvectiontermitselfhasthestrongunilateralproperty,whichmeansinformationintheupperreachesistransmitteddownstreamviatheadvectionterm;ontheotherhand,becauseoftheoppositedirectionofcalculation,itisessentialforinformationtobeconveyedupstreambymeansoftheadvectionterm.Inaddition,unlikethatintheforwardcalculation,thediffusionterminthebackwardcalculationispronetoaccumulateerrors,andthusrendersthewholeschemeunstable.Therefore,weadoptthecentraldifferencetodealwithboththeconvectionaltermandthediffusionterm.Byexaminingtwopracticalexamples(1)undertheunlimitedboundarycondition,and(2)underthelimitedboundarycondition,itisproventhatthismethodcouldachievefundamentallysatisfactoryresultsnotonlyintheopenoceanbutalsointheclosedorsemi-closedbay.

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Backward Calculation Based on the Advection and Diffusion of Oil Spills on the Sea Surface

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Backward Calculation Based on the Advection and Diffusion of Oil Spills on the Sea Surface

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