Compressible Flows
Mostrando 25-35 de 35 artigos, teses e dissertações.
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25. Simulação numérica direta de camada cisalhante compressível com fonte de calor / Compressible shear layer direct numerical simulation
No presente trabalho são feitas uma simulação numérica direta (SND) de camada de mistura em regime compressível com fonte de calor em seu interior, numa análise temporal bidimensional para um escoamento em regime subsonico. A fonte de calor apresenta-se como um modelo simplificado de um escoamento reativo. A simulação parte de um escoamento laminar a
Publicado em: 2006
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26. Numerical simulation of two dimensional compressible and incompressible flows
In this article, we make use of a stabilized Finite Element method to solve the complete set of Navier-Stokes equations. The methodology adopted is such that it allows for the use of different sets of variables, particularly the so called conservative and pressure variables. A space-time formulation using a simple augmented SUPG stabilizing term is proposed
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-12
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27. SimulaÃÃo tridimensional de escoamentos compressÃveis e incompressÃveis atravÃs do mÃtodo dos elementos finitos / Three dimensional simulation of compressible and incompressible flows through the finite element method
Muito embora os escoamentos de fluidos incompressÃveis representem um caso particular dos escoamentos de fluidos em seu espectro mais amplo, os mÃtodos numÃricos e a formulaÃÃo matemÃtica para simulaÃÃo de escoamentos compressÃveis e incompressÃveis apresentam particularidades prÃprias, de maneira que, geralmente nÃo à possÃvel abranger ambos o
Publicado em: 2004
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28. Desenvolvimento de metodo implicito para simulador numerico tridimensional de escoamentos compressiveis inviscidos
The simulation of compressible flows considered inviscid is largely appliable to aeronautics. The development of such simulations using the Garlekin discontinuous method[7,12,16,20], wich presents the good characteristics of fine element and finite volume methods, benefitting from the polynomial interpolation within subdomains and discontinuous across interf
Publicado em: 2004
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29. A mathematical formulation of the boundary integral equations for a compressible stokes flow
A general boundary integral formulation for compressible Stokes flows is theoretically described within the framework of hydrodynamic potentials. The integral equation is implemented numerically to the study of drop expansion in compressible viscous flows. Marker point positions on the drop interface are involved by using the boundary integral method for cal
Computational & Applied Mathematics. Publicado em: 2003
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30. Numerical solution of the Euler equations for representation of transonic flows over airfoils / Solução numérica das equações de Euler para representação do escoamento transônico em aerofólios
The study of aerodynamic modeling methods for the transonic flow regime is of great importance in aeronautical engineering. Major challenge on the treatment of those flows is on their nonlinear features due to compressibility effects and shock waves (appearance). Such nonlinear effects present a strong influence on aerodynamic performance, as well as they ar
Publicado em: 2003
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31. Numerical study of wedge supported oblique shock wave-oblique detonation wave transitions
The results of a numerical study of premixed Hydrogen-air flows ignition by an oblique shock wave (OSW) stabilized by a wedge are presented, in situations when initial and boundary conditions are such that transition between the initial OSW and an oblique detonation wave (ODW) is observed. More precisely, the objectives of the paper are: (i) to identify the
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-07
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32. Three-dimensional turbulent flow simulations over aerospace configurations.
The main objective of the present research work consists of studying turbulent flows over typical aerospace configurations. In order to accomplish such goal, a numerical tool to simulate 3-D compressible flows is validated and improved. A finite difference method for structured grids, written for general curvilinear coordinates, is used. A centred spatial di
Publicado em: 2002
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33. Numerical simulation of a rocket motor with chemical reaction flow / Simulação numérica do escoamento em um motor foguete com reação química
This work presents a numerical simulation of the flow field in a propellant rocket engine chamber and exit nozzle using techniques to allow the results to be taken as starting points for designing those propulsive systems. This was done using a finite volume method simulating the different flow regimes which usually take place in those systems. As the flow f
Publicado em: 2000
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34. NON-LOCAL SIMILARITY METHOD WITH BOUNDARY LAYER PROBLEMS THROUGH CROCCO TRANSFORMATION / MÉTODO DE NÃO-SIMILARIDADE LOCAL ATRAVÉS DA TRANSFORMAÇÃO DE CROCCO EM PROBLEMAS DE CAMADA LIMITE
The coordinate trnsformation developed by L. Crocco to obtain the solution of the compressible fluid flows over isotermal flat plates is originally employed in the present work, with the purpose of adding its inherent advantage to the Non-Similarity Method idealized by E. M. Sparrow, in the solution of the incompressible non-similar boundary layers. The Croc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/04/1981
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35. Generalized flows, intrinsic stochasticity, and turbulent transport
The study of passive scalar transport in a turbulent velocity field leads naturally to the notion of generalized flows, which are families of probability distributions on the space of solutions to the associated ordinary differential equations which no longer satisfy the uniqueness theorem for ordinary differential equations. Two most natural regularizations
The National Academy of Sciences.