A two-phase approach to wave-induced sediment transport under sheet flow conditions

2011 ◽  
Vol 58 (11) ◽  
pp. 1072-1088 ◽  
Author(s):  
Xin Chen ◽  
Yong Li ◽  
Xiaojing Niu ◽  
Daoyi Chen ◽  
Xiping Yu
Keyword(s):  
Sediment Transport ◽  
Flow Conditions ◽  
Sheet Flow ◽  
Two Phase ◽  
Phase Approach ◽  
Wave Induced

scholarly journals MODELING COARSE SAND TRANSPORT UNDER SKEWED OSCILLATORY FLOW USING A CFD-DEM APPROACH

2018 ◽  
pp. 18
Author(s):  
Yashar Rafati ◽  
Zhen Cheng ◽  
Xiao Yu ◽  
Tian-Jian Hsu ◽  
Joseph Calantoni
Keyword(s):  
Sediment Transport ◽  
Surf Zone ◽  
Regional Scale ◽  
Breaking Waves ◽  
Coarse Sand ◽  
Sand Transport ◽  
Sheet Flow ◽  
Two Phase ◽  
Coastal Morphology ◽  
Flow Transport

Onshore/offshore sediment transport in the nearshore is an important mechanism driving the evolution of coastal morphology. The so-called sheet flow is a transport regime, in which the flow forces are intense such that a large amount of transport occurs in a concentrated layer near the bed. Onshore transport is often associated with flow skewness/asymmetry. In the nearshore zone, due to the bottom slope and wave shoaling, the wave velocity tends be onshore skewed before breaking in the surf zone. For breaking waves, the velocity asymmetry (or acceleration skewness) may also play a key role in determining net sediment transport. Understanding the net sediment transport rate in response to wave skewness/asymmetry is fundamental to a better prediction of sediment transport in regional scale morphodynamic models. In this study, we used an Euler-Lagrange two-phase model to study sheet flow transport of coarse sand under oscillatory flows subject to velocity/acceleration skewness.

Two-phase hydrodynamic and sediment transport modeling of wave-generated sheet flow

2009 ◽  
Vol 32 (8) ◽  
pp. 1267-1283 ◽  
Author(s):  
R. Bakhtyar ◽  
A. Yeganeh-Bakhtiary ◽  
D.A. Barry ◽  
A. Ghaheri
Keyword(s):  
Sediment Transport ◽  
Transport Modeling ◽  
Sheet Flow ◽  
Two Phase

A two-phase flow model of wave-induced sheet flow

2003 ◽  
Vol 41 (3) ◽  
pp. 299-310 ◽  
Author(s):  
Tai-WeN. Hsu ◽  
Hsien-Kuo Chang ◽  
Chih-MiN. Hsieh
Keyword(s):  
Flow Model ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Sheet Flow ◽  
Two Phase ◽  
Wave Induced

scholarly journals Multi-dimensional rheology-based two-phase model for sediment transport and applications to sheet flow and pipeline scour

2016 ◽  
Vol 28 (5) ◽  
pp. 053305 ◽  
Author(s):  
Cheng-Hsien Lee ◽  
Ying Min Low ◽  
Yee-Meng Chiew
Keyword(s):  
Sediment Transport ◽  
Phase Model ◽  
Sheet Flow ◽  
Two Phase

scholarly journals GEOMETRIC CHARACTERISTICS OF WAVE-GENERATED SAND RIPPLES: A FULL-SCALE EXPERIMENTAL STUDY

2018 ◽  
pp. 48
Author(s):  
Dongxu Wang ◽  
Jing Yuan ◽  
Ole S. Madsen
Keyword(s):  
Experimental Study ◽  
Sediment Transport ◽  
Coastal Environment ◽  
Transport Processes ◽  
Flow Conditions ◽  
Sand Ripples ◽  
Geometric Characteristics ◽  
The Past ◽  
Coherent Vortex ◽  
Wave Induced

In the coastal environment, wave-induced sand ripples are usually observed under moderate near-bed flow conditions. Their occurrence significantly changes the local hydrodynamics and sediment transport processes. Over the past few decades, some solid progresses have been made towards understating the ripple dimensions under wave-generated near-bed flows, e.g., O'Donoghue et al. [2006], but very few studies are targeted on the more detailed geometric characteristics, e.g., the generic shape of ripples and the sharpness of ripple crests, which are closely related to the coherent vortex structures. This study is aimed at filling this knowledge gap.

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