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- W2368387429 abstract "While significant progresses have been achieved in recent decades in solving the hyperbolic equations of shallow water flows,which could accommodate shock waves,computational difficulty arises from the highly irregular topography in mountainous areas.In particular,under a simple operator-splitting framework,a very small time step(or Courant number) is found to be necessary for stability,and this is dictated by the magnitude of the source terms in relation to the highly irregular topography and significantly increases the computational cost.Here an efficient shock-capturing finite volume algorithm is presented for solving the hyperbolic equations of shallow water flows.It is based on a splitting scheme,a spatially second-order WAF-TVD method along with the HLL approximate Riemann solver,and a temporally third-order TVD Runge-Kutta scheme.In order to satisfy the numerical stability,a self-adaptable time step method is proposed under the Runge-Kutta scheme.Application of the model to the prediction of flooding due to sudden outburst of a real glacial-lake is evaluated.It is found that the present model is essentially free from the restriction on time step arising from highly irregular topography.Compared with previous models,the computational efficiency of the model is significantly enhanced." @default.
- W2368387429 created "2016-06-24" @default.
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- W2368387429 date "2009-01-01" @default.
- W2368387429 modified "2023-09-26" @default.
- W2368387429 title "Numerical modeling of shallow flows over irregular topography" @default.
- W2368387429 hasPublicationYear "2009" @default.
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