Predicting initial erosion during the hole erosion test by using turbulent flow CFD simulation

Kissi, Benaissa; Angel, Parron Vera Miguel; Cintas, María Dolores Rubio; Philippe, Dubujet; Khamlichi, Abdellatif; Bezzazi, Mohammed; Larbi, El Bakkali

doi:10.1016/j.apm.2011.04.036

Cited by 23 publications

(11 citation statements)

References 11 publications

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“…1 (a), the path of the fluid is extended due to the presence of hydraulic shear stress. The viscosity of the fluid and the roughness of soil surface result in the velocity gradient, which generates shear action (Benaissa et al 2012).…”

Section: Establishment Of Constitutive Relationshipsmentioning

confidence: 99%

“…The mechanism of progressive internal erosion leading to instability of the structure was interpreted and modelled by Onate et al (2011) andHicher (2013). Benaissa et al (2012) andŘíha and Jandora (2015) investigated the spatial distribution of hydraulic pressure conditions in the soil pipe. Nguyen and Indraratna (2020) developed the energy transformation model describing the fluid-solid interaction in the dynamic erosion process.…”

Section: Introductionmentioning

confidence: 99%

“…Nguyen and Indraratna (2020) developed the energy transformation model describing the fluid-solid interaction in the dynamic erosion process. Many studies (Cividini and Gioda 2004, Bonelli et al 2006, Benaissa et al 2012, Hicher 2013, Parron Vera et al 2014, Yang et al 2020, and Zhang et al 2020 performed the numerical simulation based on the mass conservation equations for predicting sediment transport. However, these numerical approaches using the computational fluid dynamics or finite element method had limitation in determining erosion characteristics of soils in the HET (Lachouette et al 2008).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A novel analytical model for determining erosion from hole erosion tests

Cai¹,

Bora²,

Pekkat³

et al. 2020

Preprint

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Determination of erosion characteristics is of great significance to assess the stability of geotechnical infrastructures that are subjected to seepage. Hole erosion tests (HETs) are the popular and simple laboratory measurements that have been used to determine erosion characteristics. These tests are indicative of the quantity of soil loss in term of internal erosion that can occur during seepage. It is noted that there are not many studies that focus on the development of theoretical model describing the erosion process (i.e. sediment detachment and transport) in HETs. The aim of this study is to propose a theoretical model based on Bernoulli's principle to interpret the erosion measurements from HETs and employ the results for estimating erosion characteristics of soils. An analytical equation was deduced from a physically based model incorporating Bernoulli's principle and erosion constitutive law for internal erosion within a soil pipe driven by pressure gradient. The analytical equation could be applied to determine the temporal development of eroded soil loss, radial erosion propagation, erosion rate, hydraulic shear stress, and pressure drop. The utility of proposed analytical solution was validated using a series of HETs performed in this study. Based on the novel analytical solution, erosion characteristics could be derived from the known realistic propagation of radial erosion.

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Section: Establishment Of Constitutive Relationshipsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A novel analytical model for determining erosion from hole erosion tests

Cai¹,

Bora²,

Pekkat³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…The RNG -model [26,27] (Renormalization Group, RNG) indicates small-scale effects in large-scale motion and the modified viscosity item, so these small-scale motions could be systematically removed from the governing equation. Through modifying turbulent flow viscosity, rotation in average flowing is taken into account, and time-average strain rates of main flows could be reflected.…”

Section: Computational Mathematic Model For Flow Fields In High-speedmentioning

confidence: 99%

Numerical study on aerodynamic characteristics of high-speed trains with considering thermal-flow coupling effects

Yang¹,

Li²,

Xing³

et al. 2017

J. vibroeng.

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In order to conduct in-depth researches on rationality of air conditioning system equipment of a high-speed train as well as its pipeline system design, working conditions of the air conditioning system and distribution of aerodynamic characteristics including pressure, velocity and temperature in high speed trains should be computed carefully at the design stage. Therefore, the finite volume method was used to solve a governing equation of computational fluid dynamics. The aerodynamic characteristics of pipelines of the air conditioning system and the complete high speed train were computed, so the indoor distribution of wind velocity, temperature and gas concentration (carbon oxide, carbon dioxide, nitrogen and so forth) was obtained. The flow field index and the thermal comfort index were used to evaluate the indoor thermal comfort degree. In this way, whether rationality of the air conditioning system design and indoor aerodynamic characteristic could satisfy requirements for design specifications can be analyzed. Results show that: Under winter or summer working conditions, wind velocity was relatively high at the passageway door, where the maximum wind velocity was more than 1 m/s and would make passengers uncomfortable. Air flow velocity outside comfortable regions was more than 0.05 m/s, satisfying UIC553 standards. Velocity distribution was basically the same indoors, where wind velocity was large at positions perpendicular to the air supply hole, and the maximum wind velocity was more than 1 m/s, but wind velocity was uniform in the passenger region, which was basically lower than 0.2 m/s and satisfied UIC553 standards. In summer and winter working conditions, distribution of pressure, velocity and temperature was not uniform, where the maximum temperature gradient was near the air inlet in the compartment. Air components in the compartment satisfied requirements for comfort. The most uncomfortable regions in the compartment were concentrated at the passageway. Air supply holes distributed symmetrically on the train roof caused high air flow intensity, high wind velocity, low temperature and high humidity at the passageway in the compartment, so the thermal comfort was low, and it is feasible to adjust the layout of air supply holes appropriately.

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“…In their study, the flow and particle interaction were accounted for by a commercial EulerianLagrangian CFD code. Benaissa et al (2012) conducted a CFD simulation with enhanced turbulence model and near wall treatment to predict initial erosion caused by water-clay mixtures flow through a cylindrical pipe. The obtained results enabled predicting erosion and allowed for understanding the irregular eroded wall shape.…”

Section: Introductionmentioning

confidence: 99%