Affiliation:
1. LMFTA, Faculty of Physics, University of Science and Technology Houari Boumediene, Bab Ezzouar, Algiers, Algeria
Abstract
The influence of the upstream flow characteristics on the behavior of the
flow over a shallow cavity and on the reattachment phenomenon is examined in
this paper. Accordingly, a comparison of the cavity?s flow structure is
performed for two different upstream flows: the wall jet flow and the
boundary layer flow. The wall jet possesses a particular structure with two
regions: an inner layer analogous to that of a boundary layer and an outer
layer similar to that of a free jet; this layer is an additional source of
turbulence production in addition to that of the inner shear layer. The
present study interested to the effect of this external layer on the shallow
cavity?s flow. The numerical approach is based on the low Reynolds
stress-omega turbulence model. Fluent 6.3 and the pre-processor Gambit 2.3
are used for the computation. The numerical results indicate that the flow
structure is very sensitive to the upstream flow?s characteristics. Indeed,
for the same Reynolds number and the same boundary layer thickness at the
cavity leading edge, the cavity flow structure in a wall jet upstream flow
case differs considerably from that of a boundary layer upstream flow. The
most important finding is the earlier reattachment process in the wall jet
inflow case, where an important reduction of the reattachment length is
observed compared to that of a cavity under a boundary layer flow.
Publisher
National Library of Serbia
Subject
Renewable Energy, Sustainability and the Environment
Cited by
14 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献