Turbulence Modeling
Mostrando 1-12 de 37 artigos, teses e dissertações.
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1. Application of an alternative mesh morphing method on the numerical modeling of oscillating wave surge converters
RESUMO Uma das tecnologias capazes de explorar a energia das ondas, baseada na captação das componentes horizontais do movimento destas, aliada a um sistema placa-pistão, vem experimentando um notável desenvolvimento ao longo dos últimos anos, tal dispositivo é conhecido como conversor oscilante por translação de ondas. Este possui um grande potencia
RBRH. Publicado em: 29/07/2019
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2. Simulación matemática para la optimización del patrón de flujo entregado por una buza para el molde de colada continua de planchón delgado
ABSTRACT Understanding the behavior of the oscillations of the jets into the mold of thin slab funnel is essential to ensure a constant supply of liquid steel, improve control of the flow patterns and consequently increase plant productivity and the final product quality. To achieve this, we conducted a study of the effect of the internal design of the nozzl
Matéria (Rio J.). Publicado em: 19/07/2018
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3. Numerical Study of Reduced Frequency Effect on Longitudinal Stability Derivatives of Airfoil under Pitching and Plunging Oscillations
ABSTRACT In this study, incompressible, unsteady and turbulent flow over an airfoil with pitching and plunging oscillations is numerically studied in order to investigate the effect of reduced frequency on stability derivatives of oscillating airfoil. Linear k – ε model called Launder-Sharma and Rhie and Chow model are used for turbulence modeling and ove
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
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4. Comparison of In-Flight Measured and Computed Aeroelastic Damping: Modal Identification Procedures and Modeling Approaches
ABSTRACT The Operational Modal Analysis technique is a methodology very often applied for the identification of dynamic systems when the input signal is unknown. The applied methodology is based on a technique to estimate the Frequency Response Functions and extract the modal parameters using only the structural dynamic response data, without assuming the kn
J. Aerosp. Technol. Manag.. Publicado em: 2016-06
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5. Numerical Study of the b-Ξ Flame Wrinkling Combustion Model in Oracles Test Rig
ABSTRACT: Numerical modeling of premixed combustion is important for a wide range of machines and systems focusing on compliance with the increasing pollutants reduction requirements. However good industrial numerical combustion models need a practical requiring, in this way, a balance between speed and accuracy. The flamelet models are suitable for this pur
J. Aerosp. Technol. Manag.. Publicado em: 2015-12
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6. INFLUENCE OF INTERFACIAL FORCES ON THE MIXTURE PREDICTION OF AN ANAEROBIC SEQUENCING BATCH REACTOR (ASBR)
AbstractIn the operation of bioreactors, the fluid movement promotes mixing between sludge and substrate. The dynamics of this system are complex, and the interaction between the phases is difficult to evaluate accurately. In this work, Computational Fluid Dynamics is applied to simulate a pilot-scale anaerobic sequencing batch reactor, using a three-dimensi
Braz. J. Chem. Eng.. Publicado em: 2015-06
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7. Noise Source Distribution of Coaxial Subsonic Jet-Short-Cowl Nozzle
ABSTRACT: The noise source distribution of a short-cowl coaxial jet operating at different velocity ratios is described in this work. This was motivated by an ongoing research about noise prediction of coaxial jets through Acoustic Analogy with purposes of industrial engine application. This research has been carried out between Universidade Federal de Uberl
J. Aerosp. Technol. Manag.. Publicado em: 2014-03
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8. Large Eddy Simulation of Bluff Body Stabilized Turbulent Premixed Flame
ABSTRACT: A turbulent reacting flow in a channel with an obstacle was simulated computationally with large eddy simulation turbulence modeling and the Xi turbulent combustion model for premixed flame. The numerical model was implemented in the open source software OpenFoam. Both inert flow and reactive flow simulations were performed. In the inert flow, comp
J. Aerosp. Technol. Manag.. Publicado em: 2013-06
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9. A study on the extension of an upwind parallel solver for turbulent flow applications
The present work is primarily concerned with studying the influence of an upwind spatial discretization on the capability of representing turbulent flows on aerospace applications, in the context of a flow simulation code that is fairly close to a production code. Therefore, the work addresses the issues of implementing and validating an advanced turbulence
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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10. Study of various numerical aspects of 3D-SPH for simulation of the dam break problem
Recently, the Smoothed Particle Hydrodynamics (SPH) method has been utilized as an effective tool for capturing details of the fluid flows. The Lagrangian nature of the SPH method facilitates the modeling of the free surface flows. In the present article, different numerical features of 3D-SPH are probed to find a set of options that can be used to achieve a
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-12
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11. Simulação de grandes escalas para análise numérica da esteira aerodinâmica da turbina eólica NREL UAE Phase VI
The Unsteady Aerodynamics Experiment Phase VI, which has been carried out in 2000 by the US National Renewable Energy Laboratory (NREL) at the NASA Ames wind tunnel, has been numerically reproduced. The purpose of this work is to study the characteristics of the wind wake produced by the 10 meter two bladed wind turbine, operating at a constant rotational sp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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12. Analysis of flicker level on the integration of fixed speed wind generators using multidiscipline models / Análise dos níveis de flicker na integração de geradores eólicos de velocidade fixa em redes de distribuição de energia elétrica utilizando modelos multidisciplinares
The discussions about the environmental issues and the need for renewable sources of energy, with low environmental impacts, mainly about CO 2 emission, have encouraged the Wind Energy expansion. The support for wind energy in the last decades enabled the improvement of the technology and a representative share in the electrical systems of some countries. Th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2011