Dispersed Flow
Mostrando 1-12 de 81 artigos, teses e dissertações.
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1. STABILITY AND TOXICITY PROFILE OF SOLUTION ENHANCED DISPERSION BY SUPERCRITICAL FLUIDS (SEDS) FORMULATED Andrographis paniculata EXTRACT
Abstract The main objective was to evaluate the stability and toxicity of a Solution Enhanced Dispersion by Supercritical Fluids (SEDS) formulated A. paniculata extract that was intended for food applications. The best formulated SEDS A. paniculata extract with improved dissolution of andrographolide (data not shown) was obtained using 25 mg/mL A. paniculata
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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2. Comportamento hidrodinâmico de sistemas alagados construídos de escoamento horizontal subsuperficial de diferentes proporções geométricas e tempos de operação
RESUMO No presente trabalho, teve-se por objetivo avaliar a influência da proporção geométrica e o tempo de operação na hidrodinâmica do sistema. Para isso, três sistemas alagados construídos de escoamento horizontal subsuperficial (SACs-EHSS) de diferentes razões comprimento:largura (L/B) foram caracterizados no que se refere ao comportamento hidr
Eng. Sanit. Ambient.. Publicado em: 25/04/2019
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3. OPTIMAL LOCATION PROBLEM FOR THE INSTALLATION OF POWER FLOW CONTROLLER
ABSTRACT In power delivery systems, the use of dispersed generation and security control to improve network utilization requires the optimal use of system control devices. The installation of loop controller allows the distribution system to operate in a loop configuration, achieving effective management of voltage and power flow. In the investment planning
Pesqui. Oper.. Publicado em: 2017-09
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4. Rheological behavior of acrylic paint blends based on polyaniline
Abstract The rheological properties of acrylic paints and polyaniline (PAni) blends, with different contents of PAni doped by dodecyl benzene sulphonic acid (DBSA) and, dispersed by mechanical stirrer and ultrasonic, were investigated by controlled shear rate testing ramps. The results showed that the commercial acrylic paint had tended to deliver the requir
Polímeros. Publicado em: 18/08/2016
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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. Extensional viscosity measurements of concentrated emulsions with the use of the opposed nozzles device
This paper presents results of experimental studies on the apparent extensional viscosity of emulsions. The apparent extensional viscosity measurements were carried out with the use of a customized rheometer which utilizes stagnation flow between two opposing nozzles. Apparent extensional viscosity was determined for emulsions containing 60, 70 and 74 vol.%
Braz. J. Chem. Eng.. Publicado em: 2014-03
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7. Equipamento de baixo custo para extração em fase sólida em amostras aquosas de grande volume utilizando pressão positiva de N
Extraction/concentration is a crucial step for the analysis of organic compounds at trace level concentrations and dispersed in complex matrices. Solid-phase extraction (SPE) is one of the techniques used for this purpose. In this work, a low cost apparatus for SPE was developed that uses nitrogen under positive pressure and ensures the maintenance of the sa
Quím. Nova. Publicado em: 2014
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8. Otimização da separação sólido-líquido em hidrociclones mediante modificações geométricas
Because of advantages such as low cost, simple structure, large capacity of suspension processing and small dimensions, hydrocyclones are widely used for separating dispersed phase (liquid or solids) from continuous one. The shape and size of a hydrocyclone has a decisive effect on the internal flow structure of the continuous phase, and therefore, the separ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/11/2012
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9. Experimentação física do escoamento gás-líquido em uma coluna de bolhas retangular utilizando a técnica PIV e a técnica de sombras SHADOW / Gas- liquid experimentation in a rectangular bubble column using PIV and Shadow techniques
Bubble columns are multiphase contact devices for mass and heat transfer, wich are intensively used in different industrial areas. Flow and turbulence in these equipments are induced by the bubble rise motion. The hydrodynamics and bubble behavior in a homogeneous bubbly flow regime was analyzed in a rectangular laboratory-scale bubble column (50 x 20 x 220
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/07/2012
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10. Influência da geometria da nanocarga na estruturação, orientação e propriedades de filmes tubulares de nanocompósitos de PA6 / Influence of the nanoparticles shape on the structure, orientation and properties of pa6 nanocomposites blown films
The structure and morphology of polymers and consequently their properties are dependent on the processing conditions. During the blown film process, high shear and elongational flows can induce a preferred orientation of the polymer chains; controlling the process conditions, it is possible to obtain films with anisotropic properties. Polymeric nanocomposit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/06/2012
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11. Simulação computacional de escoamentos reativos com baixo número Mach aplicando técnicas de refinamento adaptativo de malhas / Computational simulation of low Mach number reacting flows applying adaptive mesh refinement techniques.
It is the main goal of the present work to extend a numerical methodology based on both the use of an adaptive mesh refinement technique (AMR) and the use of a multistep, implicit-explicit time-step strategy (IMEX) to applications involving low Mach number reactive flows. Originally developed for incompressible flows, the Eulerian formulation of that methodo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/06/2012
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12. EXPERIMENTAL STUDY OF ELONGATED BUBBLES IN HORIZONTAL TWO-PHASE INTERMITTENT FLOW / ESTUDO EXPERIMENTAL DE BOLHAS ALONGADAS NO ESCOAMENTO BIFÁSICO HORIZONTAL INTERMITENTE
The present work experimentally studied several relevant dynamic characteristics of gas-liquid intermittent flow through a horizontal pipe. All tests were performed in a test section formed by 50.8 mm internal diameter pipe using air and water as working fluids. The tests covered a region where the flow undergoes a complex transition from elongated bubble fl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/04/2012