Rotating Disc
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. A Parametric Study on the Centrifugal Force-Induced Stress and Displacements in Power-Law Graded Hyperbolic Discs
Abstract An extensive parametric study on the variation of the centrifugal-force-induced stress and displacements with the inhomogeneity indexes, profile parameters and boundary conditions is conducted based on the author’s recently published analytical formulas for radially functionally power-law graded rotating hyperbolic discs under axisymmetric condit
Lat. Am. j. solids struct.. Publicado em: 15/05/2018
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2. Influence of Process Parameters on Zinc Powder Produced by Centrifugal Atomisation
An experimental centrifugal atomiser was used to study the manufacture of zinc powder. Melt temperature, melt flow rate, rotating speed and diameter of the atomising disc, are operating parameters that were varied, and their effects on powder quality and yield were observed. The median particle size and the particle size distribution tended to be better, i.e
Mat. Res.. Publicado em: 10/04/2017
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3. Oscilación de un disco giratorio visto desde un sistema de referencia en rotación
The ratio relation 1:2 between rotation and wobbling frequencies of a torque free spinning plate or disc as seen from an inertial frame is calculated using a toy model for the disc. From a convenient rotating frame, the body oscillates as a pendulum in a centrifugal field, which simplifies the description of its movement. Thus, the ratio relation is simpler
Rev. Bras. Ensino Fís.. Publicado em: 06/02/2017
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4. Analysis of the Dynamic Behavior of a Rotating Composite Hollow Shaft
Abstract In the present paper, a simplified homogenized beam theory is used in the context of a numerical investigation regarding the dynamic behavior of a rotating composite hollow shaft. For this aim, a horizontal flexible composite shaft and a rigid disc form the considered simple supported rotating system. The mathematical model of the rotor is derived f
Lat. Am. j. solids struct.. Publicado em: 2017-01
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5. Investigation of Copper Extraction from Aqueous Sulfate Solution in a Rotating Disc Contactor
The extraction of copper from aqueous sulfate solution with new extractant Cupromex-3302 (active substance is the 5-nonylsalicylaldoxime) using a rotating disc contactor (RDC) was investigated. It was observed from batch experiments that the best results were obtained with the initial aqueous pH and concentration of Cupromex-3302 of 1.9 and 10% (v/v) respect
J. Braz. Chem. Soc.. Publicado em: 2016-05
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6. Passivation of iron in solutions containing borate using rotating ring-disc measurements
Investigou-se o comportamento eletroquímico do ferro em soluções neutras de perclorato de sódio contendo pequenas concentrações de borato de sódio, através da técnica de voltametria cíclica e empregando-se eletrodo rotatório de disco e anel. Nas soluções de perclorato, a passivação do ferro ocorreu após o pico anódico correspondente à zona
Publicado em: 2010
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7. Extração da ascorbato oxidase de Cucurbita maxima por processo descontínuo e contínuo em coluna de discos rotativos perfurados utilizando sistemas de duas fases aquosas / Extraction of ascorbate oxidase from Cucurbita maxima by discontinuous and continuous process in perforated rotating disc contactor using aqueous two-phase systems.
The partition and purification of ascorbate oxidase from pumpkin (Cucurbita maxima) by liquid-liquid extraction in aqueous two-phase system (ATPS) by discontinuous and continuous process, using perforated rotating disc contactor (PRDC) was studied. Experimental designs were used to choose the significant variables for discontinuous process, and polyethylene
Publicado em: 2008
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8. CONCEPÇÃO, CONSTRUÇÃO E AVALIAÇÃO DE FOTORREATORES CATALISADOS NA DEGRADAÇÃO DE CARGA POLUENTE E AMOXICILINA EM EFLUENTE HOSPITALAR
The focus of this study was the application of advanced oxidation photoprocesses, heterogeneous photocatalysis and photo-Fenton, in the degradation of pollutant load and amoxicillin in wastewater from the University Hospital of Santa Maria (HUSM), evaluating the photoreactors performance in the degradation efficiency. In the hospital wastewater there is a wi
Publicado em: 2008
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9. Degradação de corantes ácidos por processos oxidativos avançados usando um reator com disco rotatório de baixa velocidade
Three technologies were tested (TiO2/UV, H2O2/UV, and TiO2/H2O2/UV) for the degradation and color removal of a 25 mg L-1 mixture of three acid dyes: Blue 9, Red 18, and Yellow 23. A low speed rotating disc reactor (20 rpm) and a H2O2 concentration of 2.5 mmol L-1 were used. The dyes did not significantly undergo photolysis, although they were all degraded by
Química Nova. Publicado em: 2008
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10. The removal of dinitrochlorobenzene from industrial residuals by liquid-liquid extraction with chemical reaction
Nitrochlorobenzenes (NCBs) are very important in the chemical industry since they have been used as raw material for the manufacture of crop protection products, as active ingredients in the pharmaceutical industry, as pigments and as antioxidants as well as for other uses. In industrial processes, NCBs are produced by monochlorobenzene (MCB) nitration react
Brazilian Journal of Chemical Engineering. Publicado em: 2007-09
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11. Projeto, fabricação e operação de uma máquina de ensaio de erosão por cavitação
The present work deals with the design, fabrication and operation of a cavitation erosion equipment and with the preliminary results obtained by its testing. A new cavitation erosion testing machine was designed, fabricated and tested, using a rotating disc with holes for generating cavitation. The developed equipment has as main advantages, in relation to t
Publicado em: 2007
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12. Modified Electrodes with Tungsten Oxide: Preparation Methods and Analytic Applications / Eletrodos modificados por óxido de tungstênio: Métodos de preparação e aplicações analíticas
Thin films of non-stoichiometric tungsten oxides have been deposited onto glassy carbon surfaces by electrodeposition from acidic W (VI) solutions. At these modified surfaces, rotating disc electrode voltammetric experiments indicated that iodate is electrocatalytically reduced in a mass-transport controlled process. The influence of the film thickness on th
Publicado em: 2006