Hydraulic and structural design

doi:10.1201/b15985-11

Cited by 22 publications

(11 citation statements)

References 3 publications

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“…There is some additional uncertainty in the height of the liquid level due to hydrodynamic effects, raising the actual liquid level above the rim of the weir. This effect has been assessed using the models described in [28] and estimated to raise the liquid level 1.03 ± 0.3 mm above the weir. Combining these uncertainties, the liquid level is found to be 4.47 ± 0.52 mm below the anode grid.…”

Section: Electric Fieldsmentioning

confidence: 99%

Extraction efficiency of drifting electrons in a two-phase xenon time projection chamber

et al. 2018

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A: We present a measurement of the extraction efficiency of quasi-free electrons from the liquid into the gas phase in a two-phase xenon time-projection chamber. The measurements span a range of electric fields from 2.4 to 7.1 kV/cm in the liquid xenon, corresponding to 4.5 to 13.1 kV/cm in the gaseous xenon. Extraction efficiency continues to increase at the highest extraction fields, implying that additional charge signal may be attained in two-phase xenon detectors through careful high-voltage engineering of the gate-anode region.

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Section: Electric Fieldsmentioning

confidence: 99%

Extraction efficiency of drifting electrons in a two-phase xenon time projection chamber

et al. 2018

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“…A number of studies have investigated scale effects present in Froude number physical models and determined limits in force ratios or flow variables to be applied in the physical modelling of several phenomena. Some of the most prominent examples can be found in Pfister and Chanson (2012), Pfister et al (2013) or Erpicum et al (2016).…”

Section: Introductionmentioning

confidence: 99%

Investigating Scale Effects of a Hydraulic Physical Model with 3D CFD

Torres

Borman

Sleigh

et al. 2018

Smart Dams and Reservoirs

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SYNOPSISIn the present study, the three-dimensional (3D) Computational Fluid Dynamics (CFD) Volume of Fluid (VOF) method is validated to reproduce hydraulic free surface flows over a labyrinth weir and a spillway for several flow rates using the open source toolbox OpenFOAM 3.0.1 and the commercial CFD package ANSYS Fluent 17.2. The CFD solvers are employed to simulate the 1:25 scale Froude number similarity physical model of the scheme, with validation conducted using experimental observations and measurements. It is found that both solvers are capable of accurately reproducing the velocities and depths measured in the physical model and are also able to capture complex flow features. The models are applied to simulate the prototype hydraulic flows so that scale effects from the physical model can be quantified. Results show the overall decrease in water depth and increase in velocity in the prototype can be up to 15% and 10%, respectively, for the lower flow rates, with scale effects reducing for larger flow rates. The prototype scale simulations also exhibit some variation in the labyrinth weir rating curve when compared to the scaled case; showing lower heads upstream of the crest for the same discharge. As theory would suggest, discrepancies in the rating curve at the two scales are more pronounced for low flow rates.

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“…La literatura técnica (Pfister et al, 2013) ha descrito efectos de escala que aparecen en los ensayos en modelo reducido de aliviaderos en laberinto cuando las láminas vertientes son reducidas (menores en general a 0.06 m). Dichos efectos de escala generan una cierta discrepancia entre la capacidad de desagüe observada en el modelo reducido y la capacidad real en prototipo.…”

Section: Curvas De Desagüe En Modelo Físicounclassified

Modelación física y numérica de aliviaderos en laberinto con fondo poliédrico

et al. 2016

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San Mauro et al | Modelación física y numérica de aliviaderos en laberinto con fondo poliédrico 127 Ingeniería del Agua | 20. 3 | 2016 Modelación física y numérica de aliviaderos en laberinto con fondo poliédrico RESUMENUn número importante de presas en España deben ampliar sus aliviaderos para cumplir criterios de seguridad distintos a los de su construcción. En este contexto, cobran interés soluciones de aliviaderos no convencionales como los aliviaderos en laberinto, que permiten aumentar la capacidad de desagüe de estructuras existentes con una inversión moderada. Para la optimización del diseño de este tipo de aliviaderos se desarrolla el proyecto POLILAB, en cuyo marco se llevaron a cabo las campañas de modelación física y numérica que se exponen en este artículo. Se describen los resultados más relevantes en lo relativo a la inclusión de fondos poliédricos en aliviaderos en laberinto como refuerzo estructural, contemplando además las modificaciones que implican con respecto a soluciones en laberinto con fondo plano, en lo relativo a capacidad de desagüe, patrón de flujo y acciones hidrodinámicas sobre los contornos del laberinto. Palabras clave

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Hydraulic and structural design

Cited by 22 publications

References 3 publications

Extraction efficiency of drifting electrons in a two-phase xenon time projection chamber

Extraction efficiency of drifting electrons in a two-phase xenon time projection chamber

Investigating Scale Effects of a Hydraulic Physical Model with 3D CFD

Modelación física y numérica de aliviaderos en laberinto con fondo poliédrico

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