A numerical study of sheet flow under monochromatic nonbreaking waves using a free surface resolving Eulerian two‐phase flow model
Date
2018-07-05Author
Kim, Yeulwoo
Concept link
Cheng, Zhen
Concept link
Hsu, Tian-Jian
Concept link
Chauchat, Julien
Concept link
Metadata
Show full item recordCitable URI
https://hdl.handle.net/1912/10558As published
https://doi.org/10.1029/2018JC013930DOI
10.1029/2018JC013930Abstract
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.
Description
Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 123 (2018): 4693-4719, doi:10.1029/2018JC013930.
Collections
Suggested Citation
Journal of Geophysical Research: Oceans 123 (2018): 4693-4719Related items
Showing items related by title, author, creator and subject.
-
Satellite-derived, melt-season surface temperature of the Greenland Ice Sheet (2000–2005) and its relationship to mass balance
Hall, Dorothy K.; Williams, Richard S.; Casey, K. A.; Digirolamo, Nicolo E.; Wan, Z. (American Geophysical Union, 2006-06-08)Mean, clear-sky surface temperature of the Greenland Ice Sheet was measured for each melt season from 2000 to 2005 using Moderate-Resolution Imaging Spectroradiometer (MODIS)–derived land-surface temperature (LST) data-product ... -
Elevation change of the Greenland Ice Sheet due to surface mass balance and firn processes, 1960–2014
Munneke, Peter Kuipers; Ligtenberg, Stefan R. M.; Noel, Brice P. Y.; Howat, Ian M.; Box, Jason E.; Mosley-Thompson, Ellen; McConnell, Joseph R.; Steffen, Konrad; Harper, Joel T.; Das, Sarah B.; van den Broeke, Michiel R. (Copernicus Publications on behalf of the European Geosciences Union, 2015-11-02)Observed changes in the surface elevation of the Greenland Ice Sheet are caused by ice dynamics, basal elevation change, basal melt, surface mass balance (SMB) variability, and by compaction of the overlying firn. The last ... -
Relationship between Greenland Ice Sheet surface speed and modeled effective pressure
Stevens, Laura A.; Hewitt, Ian J.; Das, Sarah B.; Behn, Mark D. (John Wiley & Sons, 2018-09-27)We use a numerical subglacial hydrology model and remotely sensed observations of Greenland Ice Sheet surface motion to test whether the inverse relationship between effective pressure and regional melt season surface ...