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Convective instability in a time-dependent buoyancy driven boundary layer

Title data

Brooker, A. M. H. ; Patterson, John C. ; Graham, Tasman ; Schöpf, Wolfgang:
Convective instability in a time-dependent buoyancy driven boundary layer.
In: International Journal of Heat and Mass Transfer. Vol. 43 (January 2000) Issue 2 . - pp. 297-310.
ISSN 0017-9310
DOI: https://doi.org/10.1016/S0017-9310(99)00127-1

Abstract in another language

The stability of the parallel time-dependent boundary layer adjacent to a suddenly heated vertical wall is described. The flow is investigated through experiments in water, through direct numerical simulation and also through linear stability analysis. The full numerical simulation of the flow shows that small perturbations to the wall boundary conditions, that are also present in the experimental study, are responsible for triggering the instability. As a result, oscillatory behaviour in the boundary layer is observed well before the transition to a steady two-dimensional flow begins. The properties of the observed oscillations are compared with those predicted by a linear stability analysis of the unsteady boundary layer using a quasi-stationary assumption and also using non-stationary assumptions by the formulation of parabolized stability equations (PSE).

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V > Chair Experimental Physics V - Univ.-Prof. Dr. Ingo Rehberg
Profile Fields > Advanced Fields > Nonlinear Dynamics
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 08 Oct 2018 09:00
Last Modified: 08 Oct 2018 09:00
URI: https://eref.uni-bayreuth.de/id/eprint/43000