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Dive into the research topics where J. Marañón Di Leo is active.

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Featured researches published by J. Marañón Di Leo.


Journal of Wind Engineering and Industrial Aerodynamics | 2001

Field study of the flow behind single and double row herbaceous windbreaks

U. Boldes; J. Colman; J. Marañón Di Leo

Abstract Field experiments in the Argentinean Pampas on strong wind days (pampero) have been carried out to investigate aspects of the wind sheltering ability on single and double-row field shelterbelts of Triticale ) inserted in wheat plantations ( Buck Charrua variety). In the present experiments hot-wire anemometry and continuous wavelet transform analysis were used to describe turbulent features of a relatively small wake region near the shelterbelt 0.5 x / H


Journal of Wind Engineering and Industrial Aerodynamics | 2002

Canopy flow and aspects of the response of plants protected by herbaceous shelterbelts and wood fences

U. Boldes; A Golberg; J. Marañón Di Leo; J. Colman; Ana Elena Scarabino

Abstract Field experiments have been conducted in the semiarid southwest region of La Pampa, Argentina, in order to investigate the effect of different types of windbreak on wind characteristics and growth parameters of wheat ( Triticum aestivum , Buck Charrua variety) within the sheltered region. Windbreaks decrease wind speed, reducing damage to the crop and improving yield and quality. Sheltering may improve microclimate conditions for plant growth and protects the soil from wind erosion. Aspects of the sheltering ability of four different windbreaks have been tested: single and double row herbaceous ( Tritio secale ) shelterbelts, and two different artificial wooden fences, with the same overall average porosity, but with different porosity distributions. Mean velocity, turbulence intensity, skewness distributions and spectral and wavelet analysis have been performed in order to characterise the turbulent flow downstream of the different windbreaks. Wheat grain yield and harvest index were compared with adjacent unsheltered plantations. The single and double row shelterbelts enhanced the grain yield and the harvest index of the protected plants. An influence of the turbulent structure on plant growth is suggested by the different response of plants sheltered by the two types of artificial fences.


Journal of Wind Engineering and Industrial Aerodynamics | 2003

About the penetration of a horizontal axis cylindrical vortex into the nearby downwind region of a vertical porous fence

U. Boldes; J. Colman; J. Marañón Di Leo

Abstract Wind tunnel experiments have been conducted on a cylindrical vortex embedded in a low turbulence stationary horizontal stream, running through a two-dimensional narrow vertical woven fence located on the wind tunnel floor. The vortex was continuously generated upwind of the fence by means of a vortex tube located well below the fence top level, with its axis aligned with the mean velocity of the external stream. The fence installed along the entire width of the tunnel had a porosity of 70%. Visualization experiments showed that approaching the fence the vortex moves away from the mean wind direction of the adjacent stream along a rising curved trajectory while the direction of the surrounding mean flow remained nearly horizontal. The results suggest that this deviation could be promoted by the vortex slanting velocity field relative to the fence, which “sees” a fence with much lower optical porosity than the fence perpendicular velocity of the nearby mean flow. The fence top shear layer flow, which dominates the downwind evolution of the mixing layer, appears to be highly sensitive to the presence of this type of vortex. The most energetic changes in the flow due to the presence of the vortex occurred in the mixing layer region. Windbreaks are usually designed in terms of mean velocity, turbulence intensity, geometric dimensions, and porosity. The results presented in this paper suggest that the sheltering ability of a porous fence depend also on the particular flow pattern of the oncoming turbulent structures embedded in the incident wind. The results show the importance for a particular wind sheltering application in knowing a priori at least some aspects of the flow pattern of the most representative turbulent structures of the local wind.


Latin American Applied Research | 2005

Experimental determination of the influence of turbulent scale on the lift and drag coefficients of low Reynolds number airfoils

J. S. Delnero; J. Marañón Di Leo; Federico Bacchi; J. Colman; U. Boldes


Journal of Wind Engineering and Industrial Aerodynamics | 2003

Characteristics of some organised structures in the turbulent wind above and within a spruce forest from field measurements

U. Boldes; Ana Elena Scarabino; J. Marañón Di Leo; J. Colman; G. Gravenhorst


Latin American Applied Research | 2010

Lift and drag coefficients behavior at low reynolds number in an airfoil with miniflaps gurney submitted to a turbulent flow: Part 2

J. Colman; J. Marañón Di Leo; J. S. Delnero; Mariano Martinez; U. Boldes; Federico Bacchi


Latin American Applied Research | 2004

Air concentrations of SO2 and wind turbulence near La Plata petrochemical pole (Argentina)

J. Marañón Di Leo; S. Delnero; J. C. Ragaini; V. Sacchetto; C. Colosqui; J. Colman; U. Boldes; Ana Elena Scarabino; Mario E. Rosato; J. Reyna Almandos


Latin American Applied Research | 2008

Lift and drag coefficients behaviour at low Reynolds number in an airfoil with Gurney flap submitted to a turbulent flow: Part 1

J. Colman; J. Marañón Di Leo; J. S. Delnero; Mariano Martinez; U. Boldes; Federico Bacchi


Latin American Applied Research | 2005

ABOUT THE TURBULENT SCALE DEPENDENT RESPONSE OF REFLEXED AIRFOILS

J. S. Delnero; J. Colman; U. Boldes; Mariano Martinez; J. Marañón Di Leo; Federico Bacchi


Latin American Applied Research | 2002

Random network model. Oil recovery calculation

J. Marañón Di Leo; J Marañón

Collaboration


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J. Colman

National University of La Plata

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U. Boldes

National University of La Plata

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Federico Bacchi

National University of La Plata

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J. S. Delnero

National University of La Plata

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Ana Elena Scarabino

National University of La Plata

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Mariano Martinez

National University of La Plata

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C. Colosqui

National University of La Plata

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S. Delnero

National University of La Plata

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G. Gravenhorst

University of Göttingen

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