Submarine channels formation driven by turbidity currents interacting with an erodible bed

Mahato, Rajesh K. and Dey, Subhasish and Ali, S K Zeeshan (2022) Submarine channels formation driven by turbidity currents interacting with an erodible bed. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 478 (2263). pp. 1-20. ISSN 1364-5021

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Abstract

In this article, we explore the submarine channel formation driven by the interaction of turbidity currents with an erodible bed. The theoretical analysis considers the three-dimensional continuity and momentum equations of the fluid phase, and the advection–diffusion and Exner equations of the solid phase. The governing equations are linearized by imposing periodic perturbations on the base flow. We study the response of both the base flow (profiles of velocity and suspended sediment concentration) and perturbations (growth rate and perturbation fields) to changes in key parameters related to the flow and sediment transport. The growth rate and the critical wavenumber are examined for a given quintet formed by the gravitational parameter, longitudinal bed slope, sediment concentration at the edge of the driving layer, Rouse number and erosion coefficient. The critical wavenumber reduces with an increase in gravitational parameter, longitudinal bed slope, sediment concentration at the edge of the driving layer and erosion coefficient, while it increases with the Rouse number. For the submarine channel formation, we identify the upper threshold values for the gravitational parameter, longitudinal bed slope, sediment concentration at the edge of the driving layer and erosion coefficient and the lower threshold value for the Rouse nu

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IITH Creators:

IITH Creators	ORCiD
Ali, S K Zeeshan	http://orcid.org/0000-0003-0763-7437

Item Type:

Article

Additional Information:

S.D. acknowledges the JC Bose Fellowship Award (JBD) [funded by DST, Science and Engineering Research Board (SERB), Grant Reference no. JCB/2018/000004] for pursuing this work. S.Z.A. acknowledges the Institute Seed Grant of Indian Institute of Technology Hyderabad in carrying out this research.

Uncontrolled Keywords:

instability, sediment transport, turbidity currents

Subjects:

Civil Engineering

Divisions:

Department of Civil Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

01 Aug 2022 09:02

Last Modified:

01 Aug 2022 09:03