DOI: 10.1029/2018JC013930
Scopus记录号: 2-s2.0-85050350689
论文题名: A Numerical Study of Sheet Flow Under Monochromatic Nonbreaking Waves Using a Free Surface Resolving Eulerian Two-Phase Flow Model
作者: Kim Y. ; Cheng Z. ; Hsu T.-J. ; Chauchat J.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 7 起始页码: 4693
结束页码: 4719
语种: 英语
英文关键词: boundary layer streaming
; multiphase flow
; sediment transport
; sheet flow
; surface waves
英文摘要: We present a new methodology that is able to concurrently resolve free surface wavefield, bottom boundary layer, and sediment transport processes throughout the entire water column. The new model, called SedWaveFoam, is developed by integrating an Eulerian two-phase model for sediment transport, SedFoam, and a surface wave solver, InterFoam/waves2Foam, in the OpenFOAM framework. SedWaveFoam is validated with a large wave flume data for sheet flow driven by monochromatic nonbreaking waves. To isolate the effect of free surface, SedWaveFoam results are contrasted with one-dimensional-vertical SedFoam results, where the latter represents the oscillating water tunnel condition. Results demonstrate that wave-averaged total sediment fluxes in both models are onshore-directed; however, this onshore transport is significantly enhanced under surface waves. Onshore-directed near-bed sediment flux is driven by a small mean current mainly associated with velocity skewness. More importantly, progressive wave streaming drives onshore transport mostly in suspended load region due to an intrawave sediment flux. Further analysis suggests that the enhanced onshore transport in suspended load is due to a “wave-stirring” mechanism, which signifies a nonlinear interaction between waves, streaming currents, and sediment suspension. We present some preliminary efforts to parameterize the wave-stirring mechanism in intrawave sediment transport formulations. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113573
Appears in Collections: 气候减缓与适应
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作者单位: Center for Applied Coastal Research, Department of Civil and Environmental Engineering, University of Delaware, Newark, DE, United States; Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods hole, MA, United States; Université Grenoble Alpes, CNRS, Grenoble INP, LEGI, Grenoble, France
Recommended Citation:
Kim Y.,Cheng Z.,Hsu T.-J.,et al. A Numerical Study of Sheet Flow Under Monochromatic Nonbreaking Waves Using a Free Surface Resolving Eulerian Two-Phase Flow Model[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(7)