Design and hydrodynamic performance testing of a new pressure sand filter diffuser plate using numerical simulation

Mesquita, Márcio; Deus, Fábio Ponciano de; Testezlaf, Roberto; Rosa, Leonardo Machado da; Diotto, Adriano Valentim

doi:10.1016/j.biosystemseng.2019.04.015

Cited by 27 publications

(24 citation statements)

References 10 publications

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“…Mesquita et al [19] confirmed by means of CFD analyses of three different types of underdrains that the best hydraulic behavior corresponded to the design with the highest flow uniformity within the porous media. More recently, Mesquita et al [20] modeled different designs of a diffuser plate, finally proposing one that increased the flow uniformity above the sand surface. The validity of this design was experimentally confirmed [20].…”

Section: Introductionmentioning

confidence: 99%

“…More recently, Mesquita et al [20] modeled different designs of a diffuser plate, finally proposing one that increased the flow uniformity above the sand surface. The validity of this design was experimentally confirmed [20]. Also based on conclusions from CFD analysis, Pujol et al [21] proposed a redistribution of underdrains in a commercial sand media filter that reduced the total filter pressure drop by 5.8%.…”

Section: Introductionmentioning

confidence: 99%

“…Analyses found in [14,21] also calibrated the momentum sink coefficients of the pressure drop equation employed in the CFD for the porous media by minimizing the error with respect to experimental data. On the other hand, though numerical analyses in [14,[17][18][19][20][21][22] were correctly set up for the objectives proposed, the level of discretization applied in the numerical models was somehow limited to include the recommended growth of layers of prismatic elements at certain walls only, ignoring those small walls of the underdrain element.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Different Pressure Drop-Flow Rate Equations in a Pressurized Porous Media Filter for Irrigation Systems

Graciano-Uribe

Pujol

Puig‐Bargués

et al. 2021

Water

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The small open area available at the slots of underdrains in pressurized granular bed filters for drip irrigation implies: (1) the existence of a region with non-uniform flow, and (2) local values of modified particle Reynolds number >500. These flow conditions may disagree with those accepted as valid for common pressure drop-flow rate correlations proposed for packed beds. Here, we carried out detailed computational fluid dynamics (CFD) simulations of a laboratory filter to analyze the results obtained with five different equations of head losses in porous media: (1) Ergun, (2) Darcy-Forchheimer, (3) Darcy, (4) Kozeny-Carman and (5) power function. Simulations were compared with experimental data at different superficial velocities obtained from previous studies. Results for two silica sand media indicated that all equations predicted total filter pressure drop values within the experimental uncertainty range when superficial velocities <38.3 m h−1. At higher flow rates, Ergun equation approximated the best to the observed results for silica sand media, being the expression recommended. A simple analytical model of the pressure drop along flow streamlines that matched CFD simulation results was developed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of Different Pressure Drop-Flow Rate Equations in a Pressurized Porous Media Filter for Irrigation Systems

Graciano-Uribe

Pujol

Puig‐Bargués

et al. 2021

Water

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“…Disc, screen, and sand filters are commonly used in agriculture [9][10][11]. Among them, the disc filter provides high filtration capacity and low energy consumption for large areas compared to other filters [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Groove Shape on Head Loss and Filtration Performance of Disc Filters

Lee

Choi

2021

Water

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To analyze the effect of a groove cross-sectional shape on disc filters, a head loss analysis and filtration performance test were conducted using disc filters with different groove shapes (semi-elliptical- and trapezoidal-shaped grooves). Furthermore, the groove shapes were analyzed using field emission scanning electron microscopy and the relationship between flow rate and head loss was derived from the head loss test. Even if the filters were designed with the same mesh standard, the sectional areas of the grooves were different depending on the shape. Therefore, the head loss was compared under the condition that the grooves have the same sectional area by applying the relationship between head loss and sectional area, and a smaller head loss was observed in the semi-elliptical-shaped groove. Additionally, the semi-elliptical-groove-shaped disc filter was evaluated to sufficiently filter the soil particles corresponding to the 120 mesh standard. Therefore, an optimum disc filter can be designed by considering the cross-sectional shape of the disc groove to reduce energy consumption and provide stable filtration. The elliptical groove shape, which is hydraulically advantageous, is preferred for the disc filter design.

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“…Mesquita et al [4] se centraron en el diseño del difusor, por su papel en la uniformidad del flujo por encima de la región del lecho de arena. Sin embargo, el diseño de la región de salida también puede tener implicaciones importantes en el rendimiento hidráulico del filtro puesto que las características del colector de salida determinan la caída de presión y afectan a la distribución del agua a cada una de las unidades de drenaje.…”

Section: Introductionunclassified

Efecto de la modificación de la tubería de salida en filtros de arena con brazos colectores

Sagaró¹,

Arbat²,

Puig‐Bargués³

et al.

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Los filtros presurizados de arena utilizados para proteger de las obturaciones las instalaciones de riego por goteo se pueden dividir en tres zonas en función de su comportamiento hidráulico: 1) entrada del agua, 2) lecho de arena, y 3) salida del agua. Estudios anteriores realizados para optimizar el funcionamiento hidráulico de este tipo de filtros se centraron en la zona de entrada y en el lecho de arena, proponiendo distintos cambios en el diseño tanto del difusor en la zona de entrada como del drenaje del lecho de arena. En el presente trabajo se analizan las consecuencias de modificar la zona de salida del agua de un filtro comercial de arena con brazos colectores sin variar su sistema de drenaje. El sistema original de salida del agua consistía en una tubería horizontal conectada a 10 brazos horizontales. Cinco diseños alternativos que diferían en su área transversal (original o doble), orientación (horizontal o vertical) y número (simple o doble) fueron numéricamente estudiados mediante dinámica de fluidos computacional en cuatro condiciones distintas de operación (dos alturas de lecho (160 y 260 mm) y dos caudales (6 y 12 m 3 h -1 )). La comparación de estos diseños con el comercial indicó que: 1) una tubería de salida con el doble del área transversal redujo la caída de presión total del filtro un 12% e incrementó la uniformidad del flujo del agua entre brazos colectores; 2) una doble tubería de salida conllevó un comportamiento simétrico del caudal respecto el brazo central pero no impidió que por el brazo central continuara circulando menor cantidad de agua que por los otros brazos colectores; y 3) una salida de agua vertical de igual diámetro que la comercial causó una caída de presión similar pero, en cambio, aumentó considerablemente la uniformidad del flujo entre los distintos brazos.

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Design and hydrodynamic performance testing of a new pressure sand filter diffuser plate using numerical simulation

Cited by 27 publications

References 10 publications

Assessment of Different Pressure Drop-Flow Rate Equations in a Pressurized Porous Media Filter for Irrigation Systems

Assessment of Different Pressure Drop-Flow Rate Equations in a Pressurized Porous Media Filter for Irrigation Systems

Effect of Groove Shape on Head Loss and Filtration Performance of Disc Filters

Efecto de la modificación de la tubería de salida en filtros de arena con brazos colectores

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