Erratum to: Turbulent velocity, sediment motion and particle trajectories under breaking tidal bores: simultaneous physical measurements

Khezri, Nazanin; Chanson, Hubert

doi:10.1007/s10652-014-9360-5

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…CC BY 4.0 License.In addition to the literature test-cases described above, aimed at reproducing steady-state flows for different regimes, we present here another test case showing the temporal evolution of a flow with a steady inlet condition, where the interaction with an obstacle results in the transition from subcritical to supercritical regime, and the backward propagation of a hydraulic jump. The boundary conditions (inlet and outlet) are based on the configurations described inKhezri (2014) andPutra et al…”

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confidence: 99%

IMEX_SfloW2D v2: a depth-averaged numerical flow model for volcanic gas-particle flows over complex topographies and water

Vitturi

Ongaro

Engwell

2023

Preprint

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Abstract. We present developments to the physical model and the open source numerical code IMEX_SfloW2D (de' Michieli Vitturi et al., Geosci. Mod. Devel., 2019). These developments consist of a generalization of the depth-averaged (shallow-water) fluid equations to describe a polydisperse fluid-solid mixture, including terms for sedimentation and entrainment, transport equations for solid particles of different sizes, transport equations for different components of the carrier phase, and an equation for temperature/energy. Of relevance for the simulation of volcanic mass flow, vaporization and entrainment of water are implemented in the new model. The model can be easily adapted to simulate a wide range of volcanic mass flows (pyroclastic avalanches, lahars, pyroclastic surges) and here we present its application to transient dilute pyroclastic density currents (PDCs). The numerical algorithm and the code have been improved to allow for simulation of sub- to supercritical regimes and to simplify the setting of initial and boundary conditions. The code is open-source. The results of synthetic numerical benchmarks demonstrate the robustness of the numerical code in simulating trans-critical flows interacting with the topography. Moreover, they highlight the importance of simulating transient in comparison to steady-state flows, and flows in 2D versus 1D. Finally, simulation of the Krakatau 1883 eruption demonstrates the capability of the numerical model to face a complex natural case involving the propagation of PDCs over the sea surface and across topographic obstacles, showing the relevance, at the large scale, of non-linear fluid dynamic features, such as hydraulic jumps and Van Karman vortexes to flow conditions such as velocity and runout.

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mentioning

confidence: 99%

IMEX_SfloW2D v2: a depth-averaged numerical flow model for volcanic gas-particle flows over complex topographies and water

Vitturi

Ongaro

Engwell

2023

Preprint

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“…Altogether here are contributions addressing solid-water flows, monophase flows, as well as gas-water, giving an interesting balance to the topics covered herein. The first paper by Khezri and Chanson [5] discusses the onset of non-cohesive sediment particle motion beneath a tidal bore. New experimental measurements of the force terms acting on solid particles beneath a breaking bore and their trajectory characteristics provide a basic understanding of sediment scour conditions.…”

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confidence: 99%

Environmental hydraulic engineering: a perspective

Chanson

Shi

2015

Environ Fluid Mech

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Hydraulic engineering is the science of water in motion, and mainly dealing with the interactions between the flowing fluid and its surrounding environment. The technical challenges are huge [2]. The levels of complexity are closely linked with the variety of water systems, the broad range of relevant time and length scales, the variability of water systems from droughts to gigantic floods, the complexity of basic fluid mechanics with non-linear governing equations, natural fluid instabilities, interactions between water, solid, air and biological life, and the total dependence of humanity on water [3]. The challenges are not only scientific but also geo-political, as discussed below. This special issue intends to cover some of recent progresses in understanding environmental flows in hydraulic engineering. In our history, water resources and water-related issues have been and continue to be present in numerous armed conflicts [2, 11]. A number of conflicts were directly impacted by natural events (typhoons, tsunamis, wind setup) [7], sometimes considered as natural catastrophes or 'divine' salvation depending upon the side. Historical man-made use of water resources included artificial droughts and floods. Droughts were created by diverting river courses and drying up surface and groundwater reserves: e.g., during the siege of Khara Khoto [12]. Artificial flooding was caused by the construction of a dam and its destruction, and the breaching of dykes [3]. Some related case was the bombing of the Sorpe and Möhne dams during the dam buster campaign in 1943 [13], and the anticipation of German dam destruction at the German-Swiss border to stop the crossing of the Rhine river by the Allied Forces during WWII [9]. Since WWII, international armed conflicts have been numerous, with increasing risks of conflict from competition for water resources and food security with prevailing climate change tendencies [6]. The scope of the relevant

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Sediment Motion beneath Surges and Bores

Li¹,

Chanson²

2018

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Erratum to: Turbulent velocity, sediment motion and particle trajectories under breaking tidal bores: simultaneous physical measurements

Cited by 3 publications

References 28 publications

IMEX_SfloW2D v2: a depth-averaged numerical flow model for volcanic gas-particle flows over complex topographies and water

IMEX_SfloW2D v2: a depth-averaged numerical flow model for volcanic gas-particle flows over complex topographies and water

Environmental hydraulic engineering: a perspective

Sediment Motion beneath Surges and Bores

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