DOI: 10.1002/2017JF004399
Scopus记录号: 2-s2.0-85045661269
论文题名: Direct Numerical Simulation of Transverse Ripples: 2. Self-Similarity, Bedform Coarsening, and Effect of Neighboring Structures
作者: Zgheib N. ; Fedele J.J. ; Hoyal D.C.J.D. ; Perillo M.M. ; Balachandar S.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 3 起始页码: 478
结束页码: 500
语种: 英语
英文关键词: bedform interactions
; coupled bed-flow simulation
; direct numerical simulation
; pattern formation
; ripples
; self-similarity
Scopus关键词: computer simulation
; flow field
; flow pattern
; flow structure
; landform evolution
; quantitative analysis
; ripple
; turbulence
英文摘要: Coupled bed-flow direct numerical simulations investigating the early stages of pattern formation and bedform (ripple) interactions were examined in a previous paper (Part 1), making use of the resolved flow field. In this paper (Part 2), we compare our results to published experimental data and provide an extensive quantitative analysis of the bed using spectral analysis and two-point correlations. The effect of the mobile rippled bed on the flow structure and turbulence is investigated locally (at specific streamwise locations) and over the entire computational domain. We show that developing ripples attain a self-similar profile in both the shape and the corresponding bed shear stress. We demonstrate the importance of neighboring structures, especially upstream neighbors, on bedform dynamics in terms of the growth, decay, and speed of ripples. Finally, we examine the defect-free interactions in the later stages of bed evolution, which primarily lead to wave coarsening. ©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/114394
Appears in Collections: 气候减缓与适应
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作者单位: Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, United States; School of Engineering, Lebanese American University, Byblos, Lebanon; ExxonMobil Upstream Research Company, Houston, TX, United States
Recommended Citation:
Zgheib N.,Fedele J.J.,Hoyal D.C.J.D.,et al. Direct Numerical Simulation of Transverse Ripples: 2. Self-Similarity, Bedform Coarsening, and Effect of Neighboring Structures[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(3)