Experimental study of liquid-solid two phase flow over a step using PIV

Cando, Edgar; Luo, Xu; Hidalgo, Víctor; Zhu, Lei; Aguinaga, Álvaro

doi:10.1088/1757-899x/129/1/012054

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…The realizable k-ε turbulence model was selected to correctly capture the turbulent nature of the flow [23][24][25], which provided robustness and an improved boundary layer solving capacity under strong pressure gradients and flow separation compared to the standard k-ε model [26]. In addition, the k-ε turbulence model requires less computational effort when compared to the k-ω SST.…”

Section: Liquid Phase Modelingmentioning

confidence: 99%

Modeling of Solid Particle Erosion for a Water–Sand Impingement System Using OpenFOAM

Narváez,

Cruzatty,

Valencia

et al. 2023

Coatings

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The development of accurate methodologies for a thorough comprehension of the erosion phenomenon is a challenging and necessary task. This study entailed an exhaustive analysis, incorporating empirical data obtained from an experiment involving the impingement of a sand and water jet on a submerged stainless-steel plate and numerical simulations, employing the Oka Erosion model that was compilated in OpenFOAM. The primary focus of this study was to generate W-shaped profiles delineating the impingement zone, derived both from experimental observations and the developed numerical model. This comparative approach facilitated a robust evaluation of the model’s efficacy in replicating erosion patterns. The outcomes of this analysis revealed a concurrence between the experimental and simulated erosion contours, affirming the model’s proficiency in representing erosion phenomena. Nevertheless, a minor discrepancy was noted, characterized by a slight underestimation of erosion rate and thickness loss. Furthermore, the investigation unveiled a noteworthy time-dependent trend in mass loss from the experimental data denoting a pseudo stabilization of the erosion rate across the time. This research contributes to the refinement of erosion modeling parameters and underscores the nature of time-dependent erosion behavior, a pivotal consideration for optimizing material durability.

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Section: Liquid Phase Modelingmentioning

confidence: 99%

Modeling of Solid Particle Erosion for a Water–Sand Impingement System Using OpenFOAM

Narváez,

Cruzatty,

Valencia

et al. 2023

Coatings

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“…With the progress of testing technology, an innovative method of simultaneous solidliquid two-phase PIV measurements has been used to study sediment movement and water-sediment interaction. Cando studied the solid-liquid two-phase flow over a step with the simultaneous PIV method [29], and Kazunori [30] studied the interaction between particles and turbulence with synchronous measurement of the solid-liquid flow. However, compared with numerical simulation, there are still few experimental studies on simultaneous two-phase flow.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Solid–Liquid Two-Phase Flow around a NACA0012 Cascade in Sediment-Laden Flow

et al. 2022

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Sediment abrasion may cause the removal of material and efficiency loss to hydraulic machinery (hydro-turbine, pump, etc.), which may worsen the internal flow and endanger the safe operation of the machines. As abrasion is caused by the impact of sediment on the solid surface, the movement of particles determines the wear intensity. To understand the wear mechanism of hydraulic machinery, the motion characteristics of the asymmetric solid–liquid two-phase flow in a sediment-laden flow around NACA0012 cascades were studied. The laser particle imaging velocimetry (PIV) method was used to measure the flow of quartz particles with median diameters d50 of 82.7 μm, 65.9 μm, and 31.8 μm near the wall of cascades at an impact angle of 10° in a Venturi circuit. The flow characteristics and velocity slip between solid and liquid phases, as well as the effects of particle size and the Reynolds number on velocity slip, were analyzed. The results showed that: (1) the flow is asymmetrically distributed in front of the cascade’s leading edge at a 10° impact angle, and there is strong velocity slip between solid and liquid phases; (2) under the influence of particle inertia, the velocity of the solid phase is higher than that of the liquid phase in the deceleration stage, while the velocity of the solid phase is lower than that of liquid phase in the acceleration stage; (3) in the process of approaching the leading edge, the velocity difference between the solid and liquid phase increases by about 10% and the angle difference increases by about 8.8°.

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“…Many studies have been conducted problem; our research group had been conducting studies on the water-sand flow through a rectangular tunnel with a step using the Particle Image Velocimetry (PIV) [1], [2], obtaining the following conclusions:…”

Section: Introductionmentioning

confidence: 99%

A Feed-Forward Backpropagation Neural Network Method for Remaining Useful Life Prediction of Francis Turbines

Aguinaga¹,

Luo²,

Hidalgo³

et al. 2017

World Congress on Mechanical, Chemical, and Material Engineering

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-In this paper, a method based on feed-forward backpropagation artificial neural networks is developed to achieve a more accurate prediction of the useful life of the Francis turbines, subject to the monitoring of the condition. Predicting the remaining life of the Francis turbine components is critical to an effective condition-based maintenance to improve reliability and reduce overall maintenance costs. With the correct instrumentation it is possible to periodically measure and calculate the necessary operating parameters and, in the present investigation, having input data, the vibration severity in speed magnitude and the turbine efficiency, there will be trained a feed-forward backpropagation neural network in such a way as to obtain the Weibull failure rate function of the Francis Turbine. A two-element input vector is introduced with 100 samples for each input; the targets (100 samples) of Weibull failure rate function are also introduced. The method developed, for its consistency and effectiveness, can be generalized to systems and rotating equipment.

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Experimental study of liquid-solid two phase flow over a step using PIV

Cited by 4 publications

References 11 publications

Modeling of Solid Particle Erosion for a Water–Sand Impingement System Using OpenFOAM

Modeling of Solid Particle Erosion for a Water–Sand Impingement System Using OpenFOAM

Asymmetric Solid–Liquid Two-Phase Flow around a NACA0012 Cascade in Sediment-Laden Flow

A Feed-Forward Backpropagation Neural Network Method for Remaining Useful Life Prediction of Francis Turbines

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