Plug Flow
Mostrando 1-12 de 50 artigos, teses e dissertações.
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1. Physical and mathematical modeling of inclusion behavior in a tundish with gas curtain
Abstract Gas injection in the tundish has been considered as an alternative to optimizing inclusion removal from steels. In the present study, physical and mathematical modeling were used to investigate the effect of gas injection in the tundish on the inclusion removal efficiency. The physical model is a 1/3 reduced scale of an industrial two-strand tundish
REM, Int. Eng. J.. Publicado em: 2020-12
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2. KINETIC MODELING AND EXPERIMENTAL VALIDATION OF A PHOTOCATALYTIC FLUIDIZED BED REACTOR FOR n-HEXANE DEGRADATION
Abstract This work presents a modeling procedure for a tall photocatalytic fluidized bed photoreactor used for the photocatalytic oxidation of n-hexane on the anatase TiO2 surface. The modeling strategy split the reactor into two parts: a lower dense phase, with high solids concentration behaving as a bubbling bed treated as a continuous stirred tank reactor
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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3. Numerical Study on Response Characteristics of Solid Rocket Pintle Motor
ABSTRACT: Pintle technology is currently a versatile technology used in a solid rocket motor (SRM) to control the desired thrust by changing the nozzle throat area, while effectively controlling the chamber pressure at the same time. The sudden movement of the pintle can induce rapid changes in the flow field and the occurrence of pressure oscillations insid
J. Aerosp. Technol. Manag.. Publicado em: 26/08/2019
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4. Silicone perforated punctal plugs for the treatment of punctal stenosis
RESUMO Objetivo: A estenose punctal pode resultar em sintomas como a epífora e diminuir significativamente a qualidade de vida dos pacientes. A inserção de um tampão perfurado é um procedimento fácil que é comumente usado como o primeiro passo do tratamento para a estenose punctal. Métodos: Dados clínicos, demográficos e de resultado foram coleta
Arq. Bras. Oftalmol.. Publicado em: 27/06/2019
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5. SIMULAÇÃO DE COMBUSTÃO DO POLIBUTADIENO LÍQUIDO HIDROXILADO, PERCLORATO DE AMÔNIO E ALUMÍNIO EM FORMULAÇÕES DE PROPELENTE SÓLIDO COMPÓSITO
The present work presents combustion simulations of hydroxyl-terminated liquid polybutadiene loaded with ammonium perchlorate and aluminum, using Chemkin software and the “Plug Flow” type reactor. These materials are widely used in solid composite propellant formulations. Through this study, the effect of parameters of axial velocity, equivalence ratio,
Quím. Nova. Publicado em: 2019-02
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6. IMPACT OF THE HYDRAULIC LOADING RATE ON THE HYDRODYNAMIC CHARACTERISTICS OF AN ANAEROBIC FIXED BED REACTOR TREATING CATTLE SLAUGHTERHOUSE WASTEWATER
ABSTRACT The hydrodynamic behavior of an anaerobic fixed bed reactor (AFBR) was evaluated in the treatment of cattle slaughterhouse wastewater. The AFBR was operated at hydraulic retention time (HRT) of 14, 11 and 8 h. Stimulus-response assays were carried out with Eosin Y and the experimental data were adjusted to the single-parameter theoretical models of
Eng. Agríc.. Publicado em: 2018-06
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7. Continuous Synthesis of a Green Fuel Additive Mixture with Highest Quantities of Solketalacetin and Solketal and Lowest Amount of Diacetin from Biodiesel-Derived Glycerol
This work presents a continuous, easy-to-scale-up system for glycerol conversion to a valuable fuel additive mixture such as solketalacetin ((2,2-dimethyl-1,3-dioxolan-4-yl)methyl acetate), solketal and minimum amount of diacetin with no byproducts. A two-stage reaction was conducted to synthesize the mixture. At first, glycerol was reacted with acetic acid
J. Braz. Chem. Soc.. Publicado em: 2018-06
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8. Tempo de retenção hidráulica em vinhaça estabilizada com calcário na fase acidogênica da digestão anaeróbia
RESUMO: O maior problema na digestão anaeróbia de resíduos de baixo teor de proteína é a instabilidade por acidez. O uso de calcário ao mesmo tempo como agente neutralizador e material suporte é inovador porque permite eliminar o dosador pois o desgaste das pedras permite a liberação lenta do carbonato de cálcio. O teor de cálcio livre no sistema
Cienc. Rural. Publicado em: 31/07/2017
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9. Ethanolic Biodiesel Production: A Comparative Study between a Plug Flow Reactor and Reactive Distillation
Abstract The interest in biodiesel as an alternative source of energy has been extremely intensified by its use as a renewable and economically viable fuel. As a result, continuous production processes have been a requirement to supply growing demand. This work presents experimental and simulated results of two biodiesel production pilot plants and makes a c
Braz. J. Chem. Eng.. Publicado em: 2017-07
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10. CONTINUOUS AND SEMICONTINUOUS REACTION SYSTEMS FOR HIGH-SOLIDS ENZYMATIC HYDROLYSIS OF LIGNOCELLULOSICS
Abstract An attractive operation strategy for the enzymatic hydrolysis of lignocellulosics results from dividing the process into three stages with complementary goals: continuous enzyme adsorption at low-solids loading (5% w/w) with recycling of the liquid phase; continuous liquefaction at high-solids content (up to 20% w/w); and, finally, continuous or sem
Braz. J. Chem. Eng.. Publicado em: 2015-12
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11. Projeto conceitual de uma planta de produção de acrilato de etila / Conceptual design for a production plant of ethyl acrylate
Um projeto conceitual para uma planta de produção de acrilato de etila foi desenvolvido. O acrilato de etila é um éster produzido a partir do ácido acrílico e do etanol. Como ferramenta para análise técnica das alternativas foi desenvolvida uma planta virtual, capaz de representar a produção em escala industrial. A planta virtual utiliza o software
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/11/2011
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12. Simulação física de fluxos gravitacionais : efeitos da variação de concentração e vazão do fluxo no depósito gerado / Physical simulation of gravitational flows : the effects of variations in concertration and output of the flow in the deposit generated
Simulações físicas de correntes de densidade em escala reduzida têm sido desenvolvidas para o entendimento dos processos físicos que ocorrem nos eventos naturais. O presente trabalho apresenta modelagens físicas de fluxos gravitacionais realizadas em tanque com forma de canal (4,5x0,15x0,5m). O objetivo foi o entendimento dos processos hidrodinâmicos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2011