UCL  IRIS
Institutional Research Information Service
UCL Logo
Please report any queries concerning the funding data shown on the profile page to:

http://www.ucl.ac.uk/finance/secure/research/post_award
Please report any queries concerning the student data shown on the profile page to:

Email: portico-services@ucl.ac.uk

Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
Publication Detail
Break-away separation for high turbulence intensity and large Reynolds number
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    SMITH FT, Scheichl B, Kluwick A
  • Publisher:
    Cambridge University Press
  • Publication date:
    03/2011
  • Pagination:
    260, 300
  • Journal:
    Journal of Fluid Mechanics
  • Volume:
    670
  • Status:
    Published
  • Print ISSN:
    0022-1120
  • Language:
    English
  • Keywords:
    boundary layer separation, boundary layers, turbulent flows, BOUNDARY-LAYER, BLUFF-BODY, ASYMPTOTIC THEORY, LAMINAR-FLOW, TRAILING-EDGE, BODIES, WAKES
Abstract
Massive flow separation from the surface of a plane bluff obstacle in an incompressible uniform stream is addressed theoretically for large values of the global Reynolds number Re. The analysis is motivated by a conclusion drawn from recent theoretical results which is corroborated by experimental findings but apparently contrasts with common reasoning: the attached boundary layer extending from the front stagnation point to the position of separation never attains a fully developed turbulent state, even for arbitrarily large Re. Consequently, the boundary layer exhibits a certain level of turbulence intensity that is linked with the separation process, governed by local viscous–inviscid interaction. Eventually, the latter mechanism is expected to be associated with rapid change of the separating shear layer towards a fully developed turbulent one. A self-consistent flow description in the vicinity of separation is derived, where the present study includes the predominantly turbulent region. We establish a criterion that acts to select the position of separation. The basic analysis here, which appears physically feasible and rational, is carried out without needing to resort to a specific turbulence closure.
Publication data is maintained in RPS. Visit https://rps.ucl.ac.uk
 More search options
UCL Authors
Dept of Mathematics
University College London - Gower Street - London - WC1E 6BT Tel:+44 (0)20 7679 2000

© UCL 1999–2011

Search by