Air Flow
Mostrando 13-24 de 660 artigos, teses e dissertações.
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13. LEAF TEMPERATURE AND TRANSPIRATION OF PEQUI TREES WITH AND WITHOUT WATER RESTRICTION
ABSTRACT The answers to when and how much to irrigate orchards can be obtained based on the measurements of plants' transpiration and leaf temperature. This study aims to determine the leaf temperature and sap flow of the pequi tree (Caryocar brasiliense Camb.), both with and without water restriction. Further, the leaf temperature was measured by infrared t
Eng. Agríc.. Publicado em: 04/11/2019
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14. Drying kinetics modeling of apple and zucchini slices vacuum impregnated with anthocyanins
RESUMO: O objetivo deste trabalho foi estudar a cinética de secagem de fatias de maçã e abobrinha enriquecidas com antocianinas e avaliar a influência da temperatura de secagem no teor de antocianinas de discos de maçã e abobrinha. Fatias de maçã (Granny Smith) e abobrinha (Cucurbita pepo) foram enriquecidas com antocianinas por impregnação a vác
Cienc. Rural. Publicado em: 03/10/2019
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15. Atomization Characteristics of Droplet and Morphologies of Arc Sprayed Ni-Al Particles and Composition Coatings
Droplet atomization characteristics and its morphology in twin-wire arc sprayed (TWAS) Ni-Al were explored in depth. Both numerical model and theoretical method were built for calculating the process of the droplet deformation and breakup in air flow, which based on the standard k-ε model and the volume of fluid (VOF) dual-phase flow model. The atomization
Mat. Res.. Publicado em: 23/09/2019
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16. EFFECT OF STEEL PLATE THICKNESSES AND FLUID FLOW CHARACTERISTICS OF AN IMPINGING AIR JET ON HEAT TRANSFER AT THE STAGNATION POINT
ABSTRACT The design and process of heat transfer elements, from its source to heat sink through various media vary according to the product and system concerned. The effect of thickness of a steel plate on heat transfer characteristics with an impinging air jet at the stagnation point was studied. Experiments were carried out with different nozzles, heights,
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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17. MODEL PREDICTIVE CONTROL FOR PRODUCTION OF ULTRA-LOW SULFUR DIESEL IN A HYDROTREATING PROCESS
ABSTRACT There is a continual desire around the world to reduce the sulphur content of diesel fuel to ultra-low levels (below 10 ppm) due to environmental concerns and the intention of improving air quality and lowering harmful exhaust emissions of diesel engines. In this work, a hydrodesulfurization unit fed with multiple diesel streams was addressed using
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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18. Structural, Morphological and Magnetic Properties of FeCo-(Fe,Co)3O4 Nanocomposite Synthesized by Proteic Sol-Gel Method Using a Rotary Oven
FeCo nanoparticles coated with (Fe,Co)3O4 (magnetite doped with cobalt) were synthesized by the proteic sol-gel chemical route. The synthesized materials were characterized by Thermogravimetry (TG), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), vibrating-sample magnetometer (VSM) and Mössbauer spectrosc
Mat. Res.. Publicado em: 18/03/2019
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19. Potential risk of drift from inclined fan nozzles
RESUMO O controle de pragas, doenças e plantas daninhas nas culturas de larga escala dependem da aplicação de produtos fitossanitários. Estas aplicações estão sujeitas a diversos fatores que podem levar à deriva. O objetivo deste trabalho foi avaliar a deriva de pontas de pulverização de jato plano inclinado. A deriva foi coletada em túnel de vent
Rev. bras. eng. agríc. ambient.. Publicado em: 2019-03
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20. Poincianella pluviosa as biomonitor of heavy metals in the municipality of Volta Redonda, RJ, Brazil
RESUMO Objetivou-se com o presente estudo determinar a concentração de metais pesados em cascas de árvores da espécie Poincianella pluviosa no município Volta Redonda, Rio de Janeiro. Foram coletadas cascas de oito árvores, com três repetições de cada, nos setores 1 (W), 2 (S), 3 (E) e 4 (N) do centro de Volta Redonda correspondente aos pontos carde
Rev. bras. eng. agríc. ambient.. Publicado em: 2019-01
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21. Evaluation of the oil flow using the MQL technique applied in the cylindrical plunge grinding of AISI 4340 steel with cbn grinding wheel
Abstract The grinding process is defined as an abrasive cutting action of a tool known as grinding wheel, which is submitted to high rotations, promoting excellent finishing and accuracy in dimensions, respecting the parameters established in each project. During the machining, the cutting edges of the abrasive grains undergo wearing and this increases the c
REM, Int. Eng. J.. Publicado em: 2018-07
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22. Application of computational fluid dynamics on a study in swine facilities with mechanical ventilation system
ABSTRACT: Ventilation systems used in swine facilities deserve to be studied because they directly affect productivity in the pig farming sector. Bearing this in mind the uniformity of air distribution and temperature is essential to animal welfare in this breeding environment. Thus, the purpose of this study was to identify whether changes in air entrances
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-05
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23. SPECTRUM AND VELOCITY OF DROPLETS OF SPRAY NOZZLES WITH AND WITHOUT AIR INDUCTION
ABSTRACT The aim of this study was to evaluate the spectrum and the velocity of droplets produced by nozzles with and without air induction, under different pressures and flow rates. The experiment was conducted in a completely randomized design with five replications, in a factorial 2 x 3 x 3 (two spray nozzles, three flow rates and three operating pressure
Eng. Agríc.. Publicado em: 2018-04
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24. Microstructure and Flight Behaviors of Droplet and its Solidification in Twin-Wire Arc Sprayed Ni-Al Composite Coatings
Droplet flight and solidification behaviors during twin-wire arc sprayed (TWAS) composite coatings were systematically investigated. Both theoretical model and numerical method were established for calculating the droplet deformation, breakup and solidification process in air flow based on the volume of fluid (VOF) dual-phase flow model jointed with the stan
Mat. Res.. Publicado em: 19/03/2018