Initial Transients in Long Wave Computations
Publication: Journal of Hydraulic Engineering
Volume 110, Issue 10
Abstract
Initial transients in long wave computations are identified as free mode responses, forced by the incompatibility between the initial conditions and the forced response. Their character is described in the context of two typical one‐dimensional channel problems and an analytical solution to the linearized equations. Strategies to avoid initial transients are investigated in detail, in particular, initially‐enhanced friction, the gradual introduction of forcing and various radiation boundary conditions. A modified Reid radiation boundary condition is recommended for general application, supplemented where necessary by gradual introduction of the forcing to minimize initial spike responses.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 110 • Issue 10 • October 1984
Pages: 1371 - 1397
Copyright
Copyright © 1984 ASCE.
History
Published online: Oct 1, 1984
Published in print: Oct 1984
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