Flow Over A Cylinder
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. Proper Orthogonal Decomposition and Spectral Analysis of a Wall-Mounted Square Cylinder Wake
ABSTRACT: The flow patterns over a finite square cylinder of aspect ratio of 3 were analyzed experimentally in a subsonic wind tunnel using the time-resolved particle image velocimetry (TR - PIV) techniques. The near wake flow structures and vortex shedding characteristics were investigated using mean flow analysis, spectral analysis and proper orthogonal de
J. Aerosp. Technol. Manag.. Publicado em: 03/05/2018
-
2. Two-dimensional Flow of Power-law Fluids over a Pair of Cylinders in a Side-by-Side Arrangement in the Laminar Regime
Abstract This manuscript presents the effect of Reynolds number (Re) and proximity of the bodies on the hydrodynamics of flow of shear-thinning, Newtonian and shear-thickening fluids over a pair of cylinders kept in side-by-side arrangement. Results obtained from the numerical simulations carried out with a combination of different parameters in the range of
Braz. J. Chem. Eng.. Publicado em: 2017-04
-
3. NOVEL SIMILARITY-SOLUTION WHICH IS APPLICABLE FOR FREE CONVECTION OVER A BODY OF ARBITRARY SHAPE: THERMAL NON-EQUILIBRIUM IN A POROUS MEDIUM
Abstract The study of the natural convection flow and heat transfer from hot surfaces in a porous medium has been of considerable interest in energy-related engineering problems. This paper is concerned with the free convection heat transfer over an arbitrary hot surface in a porous medium. It is assumed that the fluid and solid phases are not in local therm
Braz. J. Chem. Eng.. Publicado em: 2015-03
-
4. Virtual boundary method applied to a problem of computational aerolastic analysis / Método da fronteira virtual aplicado em um problema de análise aeroelástica computacional
The behavior study of a profile of a typical aerolastic section, with Reynolds in range of micro aerial vehicle, is the main focus of this work, taking as objective the estimation of parameters of flutter phenomenon. The research analyzes of the flow of a incompressible fluid on a body (cylinder and airfoil profile) at steady state and oscillating with const
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2011
-
5. Numerical simulations of flows over a rotating circular cylinder using the immersed boundary method
In this paper, numerical simulations of incompressible flows around rotating circular cylinders have been performed. The two-dimensional Navier-Stokes equations are solved by using a Cartesian non-uniform grid. The Immersed Boundary Method (IBM) with the Virtual Physical Model (VPM) was used in order to model the presence of the circular cylinder in the flow
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-03
-
6. An Eulerian Immersed Boundary Method for flow simulations over stationary and moving rigid bodies
The fluid flow over bodies with complex geometry has been the subject of research of many scientists and widely explored experimentally and numerically. The present study proposes an Eulerian Immersed Boundary Method for flows simulations over stationary or moving rigid bodies. The proposed method allows the use of Cartesians Meshes. Here, two-dimensional si
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
-
7. Simulação numérica do escoamento em torno de um cilindro utilizando o método das fronteiras imersas / Numerical simulation of flow over a cylinder using a Immersed Boundary Method
O escoamento em torno de corpos tem sido objeto de estudo de muitos pesquisadores e é muito explorado experimental e computacionalmente, devido a sua grande aplicabilidade na engenharia. No entanto, simular computacionalmente este tipo de escoamento requer uma atenção especial ao escolher o tipo malha a ser utilizado. Em muitos casos faz-se necessário o
Publicado em: 2007
-
8. SECONDARY FLOW IN PARTIALLY-OBSTRUCTED ANNULAR SPACE WITH INNER CYLINDER ROTATION / ESCOAMENTO SECUNDÁRIO EM UM ANULAR PARCIALMENTE OBSTRUÍDO COM ROTAÇÃO DO CILINDRO INTERNO
The flow inside a horizontal annulus due to the inner cylinder rotation is studied. The bottom of the annular space is partially blocked by a plate parallel to the axis of rotation, thereby destroying the circumferential symmetry of the annular space geometry. This flow configuration is found in the drilling process of horizontal petroleum wells, where a bed
Publicado em: 2004
-
9. Visualization study and quantitative velocity measurements in turbulent taylor-couette flow by phantomm flow tagging: a description of the transition to turbulence
A visualization study and Quantitative velocity measurements have been performed in Taylor-Couette flow with a medium-gap (ç= 0.356), over a large range of Taylor numbers (2.1x10(4) < Ta < 1.1x10(11)), with the outer cylinder fixed and the inner cylinder rotating about its axis. Quantitative velocity measurements were carried out using the PHANTOMM flow tag
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-12
-
10. Vortex method with turbulence sub-grid scale modelling
In this paper a method for the simulation of convection and diffusion of the vorticity, generated on a body surface is presented. A purely Lagrangian scheme is used for the vorticity convection, and thereby avoiding mesh associated problems. The body surface is simulated by straight-line panels, with constant-strength vortex distribution. The strength of the
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-04
-
11. 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
-
12. 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