A note on nonlinear flow over obstacles
- 1 April 1983
- journal article
- research article
- Published by Informa UK Limited in Geophysical & Astrophysical Fluid Dynamics
- Vol. 24 (1), 63-68
- https://doi.org/10.1080/03091928308209058
Abstract
A simple “laboratory” flow is described which exhibits the bistable behavior observed in more complicated geophysical flows. The behavior is present in a blocking experiment involving a shallow, homogeneous flow over an obstacle. It is demonstrated that within a certain parameter space, the blocking tendency depends not only on the height b O of the obstacle but on the history of the flow as well. The implied hysteresis confirms behavior predicted by Baines and Davies (1980, p. 239). It is further shown that the hysteresis is associated with a nonuniqueness in steady solutions which is, in turn, attributed to the existence of stationary blocking bores upstream of the obstacle.Keywords
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- Some Aspects of the Flow of Stratified Fluids: I. A Theoretical InvestigationTellus, 1953