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  1. Theoretical and Computational Fluid Dynamics
  2. Theoretical and Computational Fluid Dynamics : Volume 25
  3. Theoretical and Computational Fluid Dynamics : Volume 25, Issue 1-4, June 2011
  4. Hypersonic viscous flow over large roughness elements
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Theoretical and Computational Fluid Dynamics : Volume 31
Theoretical and Computational Fluid Dynamics : Volume 30
Theoretical and Computational Fluid Dynamics : Volume 29
Theoretical and Computational Fluid Dynamics : Volume 28
Theoretical and Computational Fluid Dynamics : Volume 27
Theoretical and Computational Fluid Dynamics : Volume 26
Theoretical and Computational Fluid Dynamics : Volume 25
Theoretical and Computational Fluid Dynamics : Volume 25, Issue 6, December 2011
Theoretical and Computational Fluid Dynamics : Volume 25, Issue 5, October 2011
Theoretical and Computational Fluid Dynamics : Volume 25, Issue 1-4, June 2011
Special issue on global flow instability and control
Signalling problem in absolutely unstable systems
Transient growth mechanisms of low Reynolds number flow over a low-pressure turbine blade
Transient growth and bypass transition in stenotic flow with a physiological waveform
On the downstream development and breakup of systems of trailing-line vortices
Global instabilities in diverging channel flows
Spatially developing secondary instabilities in compressible swept airfoil boundary layers
Hypersonic viscous flow over large roughness elements
On the birth of stall cells on airfoils
Global stability of separated flows: subsonic flow past corners : Global stability of separated flows
Self-sustained global oscillations in a jet in crossflow
Modeling of optimal perturbations in flat plate boundary layer using global modes: benefits and limits
Control of Tollmien–Schlichting instabilities by finite distributed wall actuation
Global modes in a confined impinging jet: application to heat transfer and control
Control of a separated boundary layer: reduced-order modeling using global modes revisited
Closed-loop bluff-body wake stabilization via fluidic excitation
Feedback control of vortex shedding from an inclined flat plate
Reduced-order models for control of fluids using the eigensystem realization algorithm
Applications of the dynamic mode decomposition
Theoretical and Computational Fluid Dynamics : Volume 24
Theoretical and Computational Fluid Dynamics : Volume 23
Theoretical and Computational Fluid Dynamics : Volume 22
Theoretical and Computational Fluid Dynamics : Volume 21
Theoretical and Computational Fluid Dynamics : Volume 20
Theoretical and Computational Fluid Dynamics : Volume 19
Theoretical and Computational Fluid Dynamics : Volume 18
Theoretical and Computational Fluid Dynamics : Volume 17
Theoretical and Computational Fluid Dynamics : Volume 16
Theoretical and Computational Fluid Dynamics : Volume 15
Theoretical and Computational Fluid Dynamics : Volume 14
Theoretical and Computational Fluid Dynamics : Volume 13
Theoretical and Computational Fluid Dynamics : Volume 12
Theoretical and Computational Fluid Dynamics : Volume 11
Theoretical and Computational Fluid Dynamics : Volume 10
Theoretical and Computational Fluid Dynamics : Volume 9

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Hypersonic viscous flow over large roughness elements

Content Provider SpringerLink
Author Chang, Chau Lyan Choudhari, Meelan M.
Copyright Year 2010
Abstract Viscous flow over discrete or distributed surface roughness has great implications for hypersonic flight due to aerothermodynamic considerations related to laminar–turbulent transition. Current prediction capability is greatly hampered by the limited knowledge base for such flows. To help fill that gap, numerical computations are used to investigate the intricate flow physics involved. An unstructured mesh, compressible Navier–Stokes code based on the space–time conservation element, solution element (CESE) method is used to perform time-accurate Navier–Stokes calculations for two roughness shapes investigated in wind tunnel experiments at NASA Langley Research Center. It was found through 2D parametric study that at subcritical Reynolds numbers, spontaneous absolute instability accompanying by sustained vortex shedding downstream of the roughness is likely to take place at subsonic free-stream conditions. On the other hand, convective instability may be the dominant mechanism for supersonic boundary layers. Three-dimensional calculations for both a rectangular and a cylindrical roughness element at post-shock Mach numbers of 4.1 and 6.5 also confirm that no self-sustained vortex generation from the top face of the roughness is observed, despite the presence of flow unsteadiness for the smaller post-shock Mach number case.
Starting Page 85
Ending Page 104
Page Count 20
File Format PDF
ISSN 09354964
Journal Theoretical and Computational Fluid Dynamics
Volume Number 25
Issue Number 1-4
e-ISSN 14322250
Language English
Publisher Springer-Verlag
Publisher Date 2010-04-20
Publisher Place Berlin, Heidelberg
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Transition Absolute instability Roughness Wake instability Space-time CESE method Hypersonic boundary layers Engineering Fluid Dynamics Computational Science and Engineering Classical Continuum Physics
Content Type Text
Resource Type Article
Subject Fluid Flow and Transfer Processes Condensed Matter Physics Computational Mechanics
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