Application Of The Relaxation Method To Model Hydraulic Jumps

A finite difference method, known as the relaxation method, is generalized from a class of relaxation schemes with the ultimate aim of numerically modelling hydraulic jumps at a phase interface. This method has been applied previously to model gravity currents arising from the instantaneous release...

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Published in:WIT Transactions on Engineering Sciences 2001-01, Vol.30
Main Author: Montgomery, P J
Format: Article
Language:English
Subjects:
Boundary conditions
Eigenvalues
Finite difference method
Iterative methods
Jacobi matrix method
Jacobian matrix
Mathematical analysis
Mathematical models
Matrix algebra
Matrix methods
Relaxation method (mathematics)
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description A finite difference method, known as the relaxation method, is generalized from a class of relaxation schemes with the ultimate aim of numerically modelling hydraulic jumps at a phase interface. This method has been applied previously to model gravity currents arising from the instantaneous release of a dense volume of fluid. The relaxation scheme is an iterative, second order accurate, time- marching method which is able to capture shocks and interfaces without front tracking or calculation of the eigenvalues of the Jacobian matrix for the flux vector. In this paper, the relaxation scheme will be described, with specific attention paid to the new generalizations included to account for boundary conditions, spatially dependent flux terms, and simple forcing terms. Numerical resu
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subjects Boundary conditions
Eigenvalues
Finite difference method
Iterative methods
Jacobi matrix method
Jacobian matrix
Mathematical analysis
Mathematical models
Matrix algebra
Matrix methods
Relaxation method (mathematics)
title Application Of The Relaxation Method To Model Hydraulic Jumps
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