Improvements to a smooth particle hydrodynamics simulator for investigating submarine landslide generated waves
File(s)
Accepted version
Author(s)
Snelling, Branwen E
Collins, Gareth S
Piggott, Matthew D
Neethling, Stephen J
Type
Journal Article
Abstract
Submarine landslides can exhibit complex rheologies, including a finite yield stress and shear thinning, yet are often simulated numerically using a Newtonian fluid rheology and simplistic boundary conditions. Here we present improvements made to a Smoothed Particle Hydrodynamics simulator to allow the accurate simulation of submarine landslide generated waves. The improvements include the addition of Bingham and Herschel‐Bulkley rheologies, which better simulate the behavior of submarine mudflows. The interaction between the base of the slide and the slope is represented more accurately through the use of a viscous stress boundary condition. This condition treats the interface between the seafloor and the slide as a fluid boundary layer with a user‐defined viscosity and length scale. Modifications to the pressure and density calculations are described that improve their stability for landslide generated wave scenarios. An option for pressure decomposition is introduced to prevent particle locking under high pressure. This facilitates the application of this simulator to landslide scenarios beneath significant water depths. Additional modifications to the reaveraging and renormalization routines improve the stability of the free surface and fluid density. We present the mathematical formulations of these improvements alongside commentary on their performance and applicability to landslide generated wave modeling. The modifications are verified against analytical fluid flow solutions and a wave generation experiment.
Date Issued
2020-01-08
Date Acceptance
2019-12-08
Citation
International Journal for Numerical Methods in Fluids, 2020, 92 (7), pp.744-764
ISSN
0271-2091
Publisher
John Wiley and Sons
Start Page
744
End Page
764
Journal / Book Title
International Journal for Numerical Methods in Fluids
Volume
92
Issue
7
Copyright Statement
© 2020 Owner. This is the accepted version of the following article: Snelling, BE, Collins, GS, Piggott, MD, Neethling, SJ. Improvements to a smooth particle hydrodynamics simulator for investigating submarine landslide generated waves. Int J Numer Meth Fluids. 2020; 92: 744– 764. which has been published in final form athttps://doi.org/10.1002/fld.4804
Sponsor
Natural Environment Research Council (NERC)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000506121900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
NE/K000047/1
Subjects
Science & Technology
Technology
Physical Sciences
Computer Science, Interdisciplinary Applications
Mathematics, Interdisciplinary Applications
Mechanics
Physics, Fluids & Plasmas
Computer Science
Mathematics
Physics
landslide
rheology
smoothed particle hydrodynamics
tsunami
NEW-GUINEA TSUNAMI
NUMERICAL-SIMULATION
IMPULSIVE WAVES
JULY 1998
MODEL
FLOWS
SPH
SLIDE
Publication Status
Published
Date Publish Online
2020-01-06