Comparison of measured and simulated flow through screens: Effects of screen inclination and porosity

Teitel, M.; Dvorkin, Dmitry V.; Haim, Y.; Tanny, Josef; Seginer, Ido

doi:10.1016/j.biosystemseng.2009.07.006

Cited by 40 publications

(14 citation statements)

References 29 publications

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“…Using a wind tunnel with screens of different porosity (0.62, 0.52 and 0.4), Teitel et al (2008a) showed that a screen inclined by airflow reduces drag compared to a flow perpendicular to the screen, allowing an increase of 15-30% and 25% in the upper compared with a flat screen. Also, Teitel et al (2009) found that higher speed screens are inclined at 45 ° and decreased to 135 ° tilt. Ali et al (2009) investigated the effect of roof vents on the temperature and coefficient of heat transfer in naturally ventilated facilities.…”

Section: Screens and Ventsmentioning

confidence: 94%

Advances in Computational Fluid Dynamics Applied to the Greenhouse Environment

Flores-Velázquez¹,

Torre-Gea²,

Rico-García³

et al. 2012

Applied Computational Fluid Dynamics

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Section: Screens and Ventsmentioning

confidence: 94%

Advances in Computational Fluid Dynamics Applied to the Greenhouse Environment

Flores-Velázquez¹,

Torre-Gea²,

Rico-García³

et al. 2012

Applied Computational Fluid Dynamics

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“…Using a wind tunnel with screens of different porosity (0.62, 0.52 and 0.4), Teitel et al (2008a) showed that a screen inclined by airflow reduces drag compared to a flow perpendicular to the screen, allowing an increase of 15 to 30% and 25% in the upper compared with a flat screen. Once more, Teitel et al (2009) found that higher speed screens are inclined at 45° and decreased to 135° tilt.…”

Section: Screens and Ventsmentioning

confidence: 95%

Computational fluid dynamics in greenhouses: A review

Torre-Gea¹,

Soto-Zarazúa²,

López‐Cruz³

et al. 2011

Afr. J. Biotechnol.

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Computational fluid dynamics is a tool that has been used in recent years to develop numerical models that improve our understanding of the interaction of variables that make up the climate inside greenhouses. In the past five years, more realistic studies have appeared due mainly to the development of more powerful software and hardware. However, it is necessary to perform an analysis to show us the trends, strengths and weaknesses in the use of this tool. In this study, we reviewed the state of the art of CFD in studies of airflow and climate inside greenhouses, analyzing the most important issues that help us understand how it has evolved, as well as trends and limitations on their use.

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“…Silt screens, configured as shown, are an example of an engineering application of screen-like structures. The presence of such screen structures in flow has been known to have significant effects on the flow characteristics, in particular the velocity and turbulence distribution (Bailey et al, 2003;Løland, 1993;Schubauer et al, 1950;Teitel et al, 2009). Past studies conducted with wire screens confirmed two important factors that determine the flow patterns about a screen structure: (a) the properties of the screen, including porosity and flexibility; and (b) the geometry of the screen.…”

Section: Introductionmentioning

confidence: 92%

Velocity and turbulence characteristics around a silt screen

Vu¹,

Tan²

2013

Proceedings of the Institution of Civil Engineers - Maritime En

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2Silt screens have been deployed extensively in lakes, rivers and oceans as a physical sediment control device to contain dispersion of silt and clay arisen from dredging activities. By changing the hydraulics of the flow in the vicinity of the project area, the presence of silt screens would affect the distribution of suspended sediment. This paper discusses the velocity profiles and turbulence -key hydraulic determinants to sediment transport -in the presence of a silt screen deployed in closed configuration. The magnitudes of the velocity and turbulence were obtained from the laboratory experiments using the technique of particle image velocimetry. The results also demonstrate that screen penetration depth is a controlling parameter of the flow characteristics. Such findings highlight that silt screen depth is a crucial design parameter in the design and deployment of silt screens.

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Comparison of measured and simulated flow through screens: Effects of screen inclination and porosity

Cited by 40 publications

References 29 publications

Advances in Computational Fluid Dynamics Applied to the Greenhouse Environment

Advances in Computational Fluid Dynamics Applied to the Greenhouse Environment

Computational fluid dynamics in greenhouses: A review

Velocity and turbulence characteristics around a silt screen

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