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Gravity currents propagating up a slope.

  • Author(s) / Creator(s)
  • Bottom propagating gravity currents resulting from full- and partial-depth lock-release experiments are investigated as they approach and then propagate up a rising slope. Consistent with the prediction of a WKB-like theory, the gravity current front decelerates in a nearly uniform manner along the slope as 0.112g ′ s(D/H)(2 − D/H), in which g ′ is the reduced gravity, s is the slope, D is the initial lock-fluid height, and H is the ambient fluid height. The shape of the gravity current as it decelerates over relatively steep slopes is found to be self similar with a nearly linear decrease of the head height between the start of the slope and up to 80% of the distance to the nose. Some deviation from self-similar behaviour is found in cases with small s because of the comparatively large volume of fluid in the gravity current tail that flows downslope while the front continues to advance upwards.

  • Date created
    2014
  • Subjects / Keywords
  • Type of Item
    Article (Published)
  • DOI
    https://doi.org/10.7939/R39G5GS9T
  • License
    © 2014 L. J. Marleau et al. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
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  • Citation for previous publication
    • Marleau, L., Flynn, M., and Sutherland B.R., S. (2014). Gravity currents propagating up a slope.. Phys. Fluids, 26(), 046605.
  • Link to related item
    http://dx.doi.org/10.1063/1.4872222