关于带有小变形的多孔河床水波散射问题研究（英文）

关于带有小变形的多孔河床水波散射问题研究（英文）Scattering of Water Waves on Porous Bed with Small Deformations: A StudyIntr

关于带有小变形的多孔河床水波散射问题研究（英 文） ScatteringofWaterWavesonPorousBedwithSmall Deformations:AStudy Introduction: Waterwavescatteringisacrucialaspectofoceanography, hydrodynamics,andcoastalengineering.Porousbedisa ubiquitousfeatureinmanynaturalandman-madewaterbodies, anditspresencecanmodifythewavedynamicssignificantly.The scatteringofwaterwavesonaporousbedhasbeenanareaof activeresearchformanydecades.Severaltheoretical,numerical, andexperimentalstudieshavebeenconductedtounderstandthe complexphysicsofwavepropagationandscatteringonaporous bed.Smalldeformationsontheporousbedleadtoadditional scatteringmechanisms,whicharenotcapturedbylinear scatteringtheory.Inthisstudy,weinvestigatethescatteringof waterwavesonaporousbedwithsmalldeformations. Porousbedandwaterwavescattering: Aporousbedconsistsofalayerofsedimentparticleswith varyingdegreesofpermeabilityandroughness.Thislayer interactswiththefluidflow,influencingwavepropagation,energy dissipation,andsedimenttransport.Whenwaterwavespropagate towardsaporousbed,theyinteractwiththeporousbedthrough severalmechanisms,includingreflection,refraction,diffraction, andabsorption.Thescatteringofwaterwavesonaporousbedis duetotheinteractionofthesemechanisms.Themagnitudeand directionofthescatteringdependonthewavelength,the porosity,thepermeability,theroughness,andtheacoustic propertiesoftheporousbed. Smalldeformationsandwavescattering: Iftheporousbedhassmalldeformations,suchasripplesand smalldunes,theycancreateadditionalscatteringmechanismsnot capturedbylinearwavescatteringtheory.Thesesmall deformationsinteractwiththeincomingwaterwaves,leadingto thegenerationofnewwavesthathavedifferentwavelengthsand directions.Themagnitudeanddirectionofthenewwavesdepend