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    2009. An Introduction to Gravity Currents and Intrusions.

  • Journal of Fluid Mechanics, Volume 594
  • January 2008, pp. 369-377

The front speed of intrusions into a continuously stratified medium

  • DIOGO BOLSTER (a1), ALICE HANG (a1) and P. F. LINDEN (a1)
  • DOI:
  • Published online: 10 January 2008

This paper examines intrusive Boussinesq gravity currents, propagating into a continuously stratified fluid. We develop a model, based on energy arguments, to predict the front speed of such an intrusive gravity current from a lock release. We find that the depth at which the intrusion occurs, which corresponds to the level of neutral buoyancy (i.e. the depth where the intrusion density equals the stratified fluid density), affects the front speed. The maximum speeds occur when the intrusion travels along the top and bottom boundaries and the minimum speed occurs at mid-depth. Experiments and numerical simulations were conducted to compare to the theoretically predicted values, and good agreement was found.

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T. R. Bewley 1999 Linear control and estimation of nonlinear chaotic convection: harnessing the butterfly effec. Phys. Fluids 11, 11691186.

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B. R. Sutherland , M. R. Flynn & K. Dohan 2004 Internal wave excitation from a collapsing mixed region. Deep Sea Res. II 51, 28892904.

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Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
  • URL: /core/journals/journal-of-fluid-mechanics
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