Fluid Dynamic Properties
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Dynamic Response of Dam-Reservoir Systems: Review and a Semi-Analytical Proposal
Abstract This paper presents a review of current techniques employed for dynamic analysis of concrete gravity dams under seismic action. Traditional procedures applied in design bureaus, such as the Pseudo-Static method, often neglect structural dynamic properties, as well as ground amplification effects. A practical alternative arises with the Pseudo-Dynami
Lat. Am. j. solids struct.. Publicado em: 2017-03
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2. EFFECTS OF NANOPARTICLES AND SURFACTANT CHARGE GROUPS ON THE PROPERTIES OF VES GEL
Abstract Application of viscoelastic surfactant (VES) fluids in hydraulic fracturing is still in the development stage, though shear thinning behavior and water solubility are the two important characteristics behind increasing interest in their use in fracturing jobs. Effects of ionic characteristics and the concentration of different surfactants on the rhe
Braz. J. Chem. Eng.. Publicado em: 2017-01
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3. Dynamic Properties of Coupled Tube-Array Structures with the Axial Loads
Abstract The tube-array structures coupled both with the fluid and the axial load is focused. In a heat exchanger, the tubes are frequently affected by cold and hot fluid shock waves. Thus, tubes are often found to be vibrated and even to be worn out. This vibration may not only alter the performance of the tubes but also introduce the damage in the heat exc
Lat. Am. j. solids struct.. Publicado em: 2016-12
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4. THE EFFECT OF SYSTEM TEMPERATURE AND PRESSURE ON THE FLUID-DYNAMIC BEHAVIOR OF THE SUPERCRITICAL ANTISOLVENT MICRONIZATION PROCESS: A NUMERICAL APPROACH
Abstract The Supercritical Antisolvent (SAS) technique allows for the precipitation of drugs and biopolymers in nanometer size in a wide range of industrial applications, while guaranteeing the physical and chemical integrity of such materials. However, a suitable combination of operating parameters is needed for each type of solute. The knowledge of fluid d
Braz. J. Chem. Eng.. Publicado em: 2016-03
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5. The Performance of Crosslinking with Divinyl Sulfone as Controlled by the Interplay Between the Chemical Modification and Conformation of Hyaluronic Acid
Hyaluronic acid (HA) microparticles crosslinked with divinyl sulfone (DVS) are primarily used in viscosupplementation to restore the viscoelastic properties of synovial fluid in the treatment of joint diseases. The crosslinking degree provides the swelling and rheological properties required for injectable application and biological stability. In this work,
J. Braz. Chem. Soc.. Publicado em: 2015-03
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6. Seismic response of aboveground steel storage tanks: comparative study of analyses by six and three correlated earthquake components
Ground motions at a point on the ground surface can be decomposed to six components, namely three translational components and three rotational components; translational components include two components in the horizontal plane, and one in the vertical direction. Rotation about horizontal axes leads to rising of rocking, while the rotational component about
Lat. Am. j. solids struct.. Publicado em: 2013-11
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7. Estudo das características fluidodinâmicas de misturas da madeira de eucalipto e do caroço do fruto do tucumã com inerte visando aplicação em processos de termoconversão / Study of fluid dynamic characteristics of mixtures of eucalyptus wood and tucumã endocarp with inert for application in thermal conversion processes
Este trabalho tem por objetivo estudar o comportamento fluidodinâmico de misturas binárias entre as biomassas madeira de eucalipto (Eucalyptus grandis) e o caroço do fruto do tucumã (Astrocaryum aculeatum), e areia como inerte, visando à aplicação em processos de termoconversão que utilizam a tecnologia de leito fluidizado. Os experimentos foram real
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/07/2012
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8. Influência das propriedades fluidodinâmicas na matriz do biodiesel metílico e suas misturas diesel/biodiesel de óleo de peixe / INFLUENCE OF THE FLUID DYNAMIC PROPERTIES IN METHYL BIODIESEL MATRIX FROM FISH OIL AND THEIR DISEL/BIODIESEL MIXTURES.
A eficiência de um motor no processo de combustão depende, dentre outros fatores, da viscosidade do combustível. Uma alta viscosidade diminui a volatilização implicando em uma combustão incompleta. O biodiesel adicionado ao diesel mineral induz em melhorias nas suas características no que diz respeito às emissões dos gases resultantes da combustão
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/09/2010
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9. Numerical simulation CFD in the quenching process / Simulação numerica CFD no processo de tempera
In the quenching heat treatment is a great difficulty to understand the different cooling profiles occurring at the surface and subsurface of the material, that define the structure formed and the final properties desired. The formation of different types of structures in the material can occurs due to uneven cooling caused by fluid dynamic conditions of the
Publicado em: 2009
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10. Evaluation of the Fluid Dynamic Properties and Kinetic Study by Pressurized Differential Scanning Calorimetry (PDSC) of Ethanolic Biodiesel Derived from Used Frying Oil / Avaliação das Propriedades Fluído-dinâmicas e Estudo Cinético por Calorimetria Exploratória Diferencial Pressurizada (PDSC) de Biodiesel Etílico Derivado de óleo de fritura usado
The present work aimed at investigating the biodiesel issuing from the transesterification of used frying oil with ethanol, via alkaline catalysis. Such investigation covers its thermo-oxidative stability during heating (thermal analysis and rheological properties) as well the kinetic profiles of the samples in the best oxidative induction time by the techni
Publicado em: 2009
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11. Superfícies de pontos dinâmicas / Dynamic point set surfaces
The study of the behaviour of fluids is an ancient field in natural sciences. Recently, engineering phenomena that were empirically studied started to be done with computacional aid. The Computational Fluid Dynamics (CFD) is the area of science that studies computational methods for computer simulation of fluid flow, and often is the most practical way, or t
Publicado em: 2009
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12. Monotoring of the Oxidative Stability Toward the Storage in Glass Containers Soybean/Castor Oil Methanol Biodiesel and the Blends / Monitoramento da Estabilidade Oxidativa no Armazenamento de Biodiesel Metílico de Soja/Mamona e Blendas em Recipientes de Vidro
O presente trabalho buscou sintetizar, armazenar e monitorar os biodiesel proveniente da transesterificação homogênea alcalina do óleo de soja e mamona via rota metílica, por catálise básica, bem como avaliar a estabilidade de indução oxidativa pela norma EN14112 durante o período de 60 dias. Também, foi observado o comportamento dos referidos bio
Publicado em: 2009