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An Improved Two-Layer Shallow Water Model for the Simulation of Gravity Currents Moving on Both Flat and up-Sloping Beds

Author(s): Claudia Adduce; Valentina Lombardi; Giampiero Sciortino; Michele La Rocca; Mario Morganti

Linked Author(s): Claudia Adduce, Michele La Rocca

Keywords: Gravity currents; Shallow water model; Laboratory experiments

Abstract: This paper investigates gravity current’s dynamics by numerical simulations and lock exchange experiments varying the bed’s angle. An improved version of the shallow water model proposed by Adduce et al. (2012) is tested. Unlike the original model, the present one accounts for spatial and temporal variations of the current’s density and an improved velocity scale is used to define the entrainment coefficient. The comparison between experimental and numerical results show that the present model reproduce the current’s shape and the front’s position better than the original model.

DOI:

Year: 2014

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