Turbulence processes within turbidity currents. (English) Zbl 1459.76063

Moin, Parviz (ed.) et al., Annual review of fluid mechanics. Vol. 53. Palo Alto, CA: Annual Reviews. Annu. Rev. Fluid Mech. 53, 59-83 (2021).
Summary: Sediment-laden gravity currents, or turbidity currents, are density-driven flows that transport vast quantities of particulate material across the floor of lakes and oceans. Turbidity currents are generated by slope failure or initiated when a sediment-laden flow enters into a lake or ocean; here, lofting or convective sedimentation processes may control flow dynamics. Depending upon the internal turbulent mixing, which keeps particles in suspension, turbidity currents can travel for thousands of kilometers across the seafloor. However, despite several competing theories, the process for the ultralong runout of these flows remains enigmatic. Turbidity currents often generate large sinuous channel-levee systems, and the dynamics of how turbidity currents flow around channel bends are strongly influenced by internal density and velocity structure, with large-scale flows being modified by the Coriolis force. Therefore, understanding some of the largest sedimentary structures on the Earth’s surface depends on understanding the turbulence processes within turbidity currents.
For the entire collection see [Zbl 1456.76004].


76F25 Turbulent transport, mixing
76T20 Suspensions
76U60 Geophysical flows
76-02 Research exposition (monographs, survey articles) pertaining to fluid mechanics
86A05 Hydrology, hydrography, oceanography
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