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• W2012634579 abstract "A theoretical formulation and corresponding numerical solutions are presented for fluid flow and sediment transport past evolutionary sand dunes. Time-dependent curvilinear coordinates are employed to fully couple flow aloft with the developing landform. The differential conservation law that defines shape of the lower boundary depends on details of local surface stress, thereby favoring the large eddy simulation of the boundary layer. To shrink the gap between the time scales characteristic of planetary boundary layer flows O(10(3)) s and sand dune evolution O(10(6)) s, a hypothetical severe-wind scenario is adopted with the saltation flux amplified up to 3 orders of magnitude. While the results are largely insensitive to the rescaling, the efficacy of computations is greatly improved. The flux-form partial differential equation for the interface profile--via saltation and sand avalanches--is formulated as an advection-diffusion equation, to facilitate discrete integrations. Numerical experiments verify the adopted theoretical framework by reproducing scaling results reported in the literature. The versatility of the approach is illustrated with evolution of a sandhole--an example of application likely never addressed in the literature, yet realizable in nature." @default.
• W2012634579 created "2016-06-24" @default.
• W2012634579 creator A5007106763 @default.
• W2012634579 creator A5051586860 @default.
• W2012634579 date "2009-04-20" @default.
• W2012634579 modified "2023-09-23" @default.
• W2012634579 title "Coupling the dynamics of boundary layers and evolutionary dunes" @default.
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• W2012634579 doi "https://doi.org/10.1103/physreve.79.041307" @default.
• W2012634579 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19518224" @default.
• W2012634579 hasPublicationYear "2009" @default.
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