Mixing Times
Mostrando 1-12 de 92 artigos, teses e dissertações.
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1. EXPERIMENTAL AND NUMERICAL ANALYSIS OF CHAOTIC ADVECTION AS AN EFFICIENT APPROACH TO MAXIMIZE HOMOGENEOUS LAMINAR MIXING IN A BATCH MIXER
Abstract In the present work, the impacts of effective parameters on the mixing of Stokes flows in a chaotic batch mixer are numerically and experimentally studied. The batch mixer consists of a container and two circular rotors where the rotors can rotate independently. To investigate the possibility of improving the mixing, the effect of non-constant speed
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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2. BRIQUETTES QUALITY PRODUCED WITH THE MACAUBA EPICARP (Acrocomia aculeata) AND Pinus sp. WOOD
RESUMO A macaúba (Acrocomia aculeata) é uma palmeira oleaginosa de alto valor econômico pela sua grande produtividade e pelas amplas possibilidades de aproveitamento das diferentes partes da planta. Esta palmeira é uma das espécies mais promissoras para a produção de biodiesel, e, durante o seu uso, há geração de grande quantidade de resíduos. O o
Rev. Árvore. Publicado em: 25/11/2019
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3. Physical Compatibility and Stability of Pesticide Mixtures at Different Spray Volumes
RESUMO: As informações disponíveis sobre compatibilidade física e estabilidade de misturas de agrotóxicos são escassas e muitas vezes divergentes. Esse conhecimento é de fundamental importância no sucesso de programas de controle de insetos-praga, doenças e plantas daninhas. Nesta pesquisa foi avaliada, em condições laboratoriais, a compatibilidad
Planta daninha. Publicado em: 04/11/2019
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4. Desestratificação de reservatórios por meio de aeração artificial
RESUMO No presente trabalho, avaliou-se em escala de laboratório e por meio de modelagem matemática o processo de desestratificação da coluna d’água usando aeração por ar difuso. Foram identificados dois padrões de escoamento: um regime de pluma, no qual o escoamento induzido pelas bolhas penetra na interface entre as duas camadas de diferentes den
Eng. Sanit. Ambient.. Publicado em: 30/05/2019
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5. BiodentineTM is cytocompatible with human primary osteoblasts
Abstract Calcium silicate-based materials have been widely studied due to their resemblance to, and similar applicability of, mineral trioxide aggregate (MTA). Among these, Biodentine™ (BD) was specifically designed as a “dentin replacement” material for applications such as root perforations, apexification, treatment of resorptive lesions, and as a re
Braz. oral res.. Publicado em: 09/10/2017
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6. REACTION KINETICS OF OZONE GAS IN WHEAT FLOUR
ABSTRACT The implementation of the ozonation process in the milling industry to control insect pests and improve wheat flour qualities requires understanding the behavior of ozone during ozonation. Therefore, this study aimed to investigate the reaction kinetics of ozone gas in wheat flour. Wheat flour ozonation at concentrations of 0.54, 1.07, 1.61 and 2.14
Eng. Agríc.. Publicado em: 2017-06
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7. Chitosan-collagen biomembrane embedded with calcium-aluminate enhances dentinogenic potential of pulp cells
Abstract The development of biomaterials capable of driving dental pulp stem cell differentiation into odontoblast-like cells able to secrete reparative dentin is the goal of current conservative dentistry. In the present investigation, a biomembrane (BM) composed of a chitosan/collagen matrix embedded with calcium-aluminate microparticles was tested. The BM
Braz. oral res.. Publicado em: 26/04/2016
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8. Effective low-energy mixing procedure to develop high-fluidity cementitious pastes
Preparing a high fluidity paste is a major step in ultra-high performance concrete (UHPC) development with respect to its self-compacting ability as well as its ultra-high strength. In this regard, some experiments have been carried out in order to study various superplasticizer (SP) addition methods and times. Among these procedures, stepwise and delayed me
Matéria (Rio J.). Publicado em: 2016-03
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9. Hydrodynamic Simulation of Gas - Particle Injection Into Molten Lead
A multiphase- hydrodynamic model was solved with the phase field method and the Cahn-Hilliard equation to simulate the behavior of particle injection with nitrogen as conveying gas through a submerged lance into a lead bath in two dimensions. The residence and mixing time were obtained for different operating parameters like gas flow rate, lance depth, and d
Mat. Res.. Publicado em: 01/07/2014
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10. Avaliação da resistência à compressão e da absorção de água de concretos utilizados após o tempo máximo de mistura e transporte especificado pela NBR 7212 / Evaluation of compressive strength and water absorption of concrete used after the maximum time of mixing and transport specified by NBR 7212
The Brazilian standard NBR 7212 (ABNT, 1984), for execution of ready-mixed concrete, specifies the maximum time for concrete to be discharged (used) completely in 150 minutes. The usage time of the concrete is due to reactions of the cement hydration and slump loss that occurs with fresh concrete, a normal phenomenon defined as the loss of fluidity along the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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11. Análise da influência de impelidores laterais no tempo de mistura em tanques de estocagem de diesel com o uso da fluidodinâmica computacional / Analysis of the influence of side-entry mixers on the mixing time in diesel storage vessels using computational fluid dynamics
The homogenization process of hydrocarbons in large scale storage tanks equipped with side-entry impellers plays an important role in a refinery operation, since the quality of the final products depends on the performance of this process. Computational Fluid Dynamics (CFD) is the most viable technique to evaluate and to optimize this process, as experimenta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/11/2011
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12. Estudo de misturas asfálticas mornas em revestimentos de pavimentos para redução de emissão de poluentes e de consumo energético. / Study of warm mixes asphalt as a pavement surface for reducing polluants emissions and energy consumption.
In the last years there has been an increasing concern for the environment. In this context, warm mixes asphalt was developed with positive impact not only on the environmental pollution, but also on the energy consumption, due to the reduction of mixing and compaction temperatures. This work compares the behavior of warm mixes asphalts (with surfactant addi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/05/2011