Result: Numerical analysis of control of flow oscillations in open cavity using moving bottom wall

Title:
Numerical analysis of control of flow oscillations in open cavity using moving bottom wall
Authors:
YOSHIDA, Takashi, WATANABE, Takashi, IKEDA, Toshihiko, IIO, Shouichiro
Source:
JSME international journal. Series B, fluids and thermal engineering. 49(4):1098-1104
Publisher Information:
Tokyo: Japan Society of Mechanical Engineers, 2006.
Publication Year:
2006
Physical Description:
print, 9 ref
Original Material:
INIST-CNRS
Subject Terms:
Energy, Énergie, Mechanical engineering, Génie mécanique, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Domaines classiques de la physique (y compris les applications), Fundamental areas of phenomenology (including applications), Mécanique des fluides, Fluid dynamics, Méthodes de calcul en mécanique des fluides, Computational methods in fluid dynamics, Contrôle d'écoulement, Flow control, Autooscillation, Selfoscillation, Autooscilación, Commande écoulement, Flow control, Ecoulement cavité, Cavity flow, Flujo cavidad, Ecoulement oscillatoire, Oscillating flow, Flujo oscilatorio, Fluide incompressible, Incompressible fluid, Fluido incompresible, Modélisation, Modelling, Mécanique fluide numérique, Computational fluid dynamics, Méthode différence finie, Finite difference method, Paroi mobile, Moving wall, Pared móvil, Simulation numérique, Digital simulation, Cavity Flow, Computational Fluid Dynamics, Finite Difference Method, Flow Control, Incompressible Flow, Oscillatory Flow, Self-Sustained Oscillation
Time:
4711, 4762
Document Type:
Conference Conference Paper
File Description:
text
Language:
English
Author Affiliations:
Department of Environmental Science and Technology, Shinshu University, 4-17-1 Wakasato, Nagano-shi, Nagano 380-8553, Japan
EcoTopia Science Institute, Nagoya University, Furo-cho Chikusa-ku, Nagoya-shi, Aichi 464-8603, Japan
ISSN:
1340-8054
Access URL:
http://pascal-francis.inist.fr/vibad/index.php?action=search&terms=18450155
Rights:
Copyright 2007 INIST-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Notes:
Physics: fluid mechanics
Accession Number:
edscal.18450155
Database:
PASCAL Archive

Further Information

In this study, we investigate the active control of self-sustained oscillating flow over an open cavity using a moving bottom wall. The incompressible Navier-Stokes equations are solved using finite difference methods for the two-dimensional cavity with laminar boundary layer upstream. We move the cavity bottom wall tangentially with nondimensional velocities ranging from -0.2 to +0.2. The results show that wall velocity changes the characteristics of recirculating flow in the cavity and that the modification of recirculating flow plays an important role in changing the oscillation characteristics of the separated shear layer. When the wall velocity is less than -0.1, two recirculating vortices change to one clockwise recirculating vortex in the cavity, so that the self-excited shear layer oscillations are completely suppressed. When the wall velocity is more than +0.19, two stationary vortices exist on the upper side and lower side of the cavity and the self-excited shear layer oscillations are suppressed.