Computational Methods in River Hydraulics and Density-Stratified Flow

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Hydraulics and Hydrodynamics".

Deadline for manuscript submissions: closed (15 October 2023) | Viewed by 2815

Special Issue Editors


E-Mail Website
Guest Editor
Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC H3G 1M8, Canada
Interests: computational fluid dynamics; turbulence; hydraulic engineering; river hydraulics; fluid mechanics
Faculty of Civil & Environmental Engineering and Geography Science, Ningbo University, Ningbo 315211, China
Interests: turbulent flow; fluid mechanics; numerical simulation; computational fluid dynamics; hydrodynamics

Special Issue Information

Dear Colleagues,

This Special Issue focuses on state-of-the-art computational methods for river dynamics and estuary processes. In an estuary, freshwater from river discharge interacts with oceanic shelf-water, giving rise to density-stratified flow. This Special Issue aims to advance numerical techniques and update effective strategies for their validations, and also covers Eulerian, Lagrangian, and artificial intelligence techniques. Interesting applications include river turbulence, river sediment transport, morphological evolution, estuary hydrodynamics, river plume, salinity transport and intrusion, tidal flushing, as well as the fate and transport of wastes and pollutants in a density-stratified estuary. This Special Issue is situated within the existing literature of river and estuary dynamics and current trends. The recent decade has witnessed an increasingly expanding research focus on extreme computing, multi-phase flow, Big Data, the GIS-based assessment of river modelling, large-scale river turbulence measurements, the estimation of river discharge and estuary depth from remote sensing, the computer prediction of river plume impacts on coastal water, the Lagrangian modeling of turbulence in a tidally influenced river, the prediction of river sediment transport using neural network models, the computer forecast effects of sea level rise on estuary hydrodynamics and transport processes, and the coupled prediction of hydrodynamics and water quality in natural and urbanised estuaries.

Prof. Dr. S. Samuel Li
Dr. Tibing Xu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • computational methods
  • river dynamics
  • estuary processes
  • turbulence
  • sediment transport
  • salinity transport
  • neural network models

Published Papers (2 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

21 pages, 10116 KiB  
Article
Analysis of the Force Characteristics of Two Tandem Cylinders by Internal Waves over Slope Topography
by Yin Wang, Xiahui Xiong, Chenhui Zhang, Lingling Wang, Xiaobin Wu, Hua Wang, Zhi Liu and Chunling Wang
Water 2023, 15(18), 3259; https://doi.org/10.3390/w15183259 - 13 Sep 2023
Viewed by 845
Abstract
Large-amplitude internal waves (IWs) with strong lateral shear forces can cause destructive effects on marine engineering structures. In this study, a large eddy simulation (LES) method was employed to simulate the generation and propagation of IWs in a three-dimensional numerical wave tank, and [...] Read more.
Large-amplitude internal waves (IWs) with strong lateral shear forces can cause destructive effects on marine engineering structures. In this study, a large eddy simulation (LES) method was employed to simulate the generation and propagation of IWs in a three-dimensional numerical wave tank, and the pressure distribution, flow field characteristics, and force behaviors of two tandem cylinders under the coupling effect of the IWs and slope terrain were studied. The influence mechanism of the normalized value of center-to-center spacing (L) and the diameter of the cylinder (D), i.e., (L/D), on the strength of the vortex disturbance between cylinders was studied by comparing the simulation results of two tandem cylinders with those of a single cylinder (SC) to further explore the mechanical response characteristics of the upstream cylinder (P1) and downstream cylinder (P2). The simulation results showed that the vortex interaction between cylinders is the critical factor that affects the forces acting on the cylinders. The strength of the vortex disturbance could be distinguished by the dimensionless critical center-to-center spacing between cylinders (Lc/D = 3.0). When L/DLc/D, the vortex disturbance was severe, causing P1 and P2 to experience significant horizontal positive forces and negative forces, respectively. In the case of L/D > Lc/D, the forces acting on both cylinders gradually returned to those on a single cylinder. Full article
(This article belongs to the Special Issue Computational Methods in River Hydraulics and Density-Stratified Flow)
Show Figures

Figure 1

26 pages, 12821 KiB  
Article
SPH Simulation of Sediment Movement from Dam Breaks
by Xiaogang Zheng, Matteo Rubinato, Xingnian Liu, Yufei Ding, Ridong Chen and Ehsan Kazemi
Water 2023, 15(17), 3033; https://doi.org/10.3390/w15173033 - 24 Aug 2023
Viewed by 1628
Abstract
This study aims to develop a robust sediment transport model focusing on the vertical two-dimensional water–sediment two-phase flow in which sediments are constantly interacting, hitting each other, gradually becoming smoother and smaller, and accumulating when velocities decrease. The grid-based models currently available can [...] Read more.
This study aims to develop a robust sediment transport model focusing on the vertical two-dimensional water–sediment two-phase flow in which sediments are constantly interacting, hitting each other, gradually becoming smoother and smaller, and accumulating when velocities decrease. The grid-based models currently available can be cumbersome when dealing with phenomena that require replication of this water–sediment interface. Therefore, a two-dimensional water–sediment two-phase flow model based on Smoothed Particle Hydrodynamics (SPH) is established in the macroscopic scale to simulate a large amount of sediment accumulation and propagation typical of a landslide caused by a dam break. In this study, water and sediments are treated as two kinds of fluids with different densities and viscosities to accurately simulate the flow structure, the sediment transport, and the water–sediment interaction process. The interaction model developed treats the interface of the two phases within a unified framework. The model developed was then tested against three applications, and the results obtained confirmed its accuracy in correctly replicating the movement of the sediment phase. The preliminary results obtained can be helpful in providing further insights into the mixing of water and sediments and their propagation following a dam break and the consequent wave profile generated. Full article
(This article belongs to the Special Issue Computational Methods in River Hydraulics and Density-Stratified Flow)
Show Figures

Figure 1

Back to TopTop