Modeling of Unsteady Flow in Curved Channel
Publication: Journal of Hydraulic Engineering
Volume 115, Issue 11
Abstract
TO analyze unsteady flow in a curved channel, three‐dimensional equations describing the conservation of mass and momentum are transformed from a Cartesian coordinate system to a channel‐fitted coordinate system. This transformation allows the use of a simple reflection boundary to simulate the walls of a curved channel. Equations in channel‐fitted coordinates are then integrated over the depth to obtain a set of depth‐averaged two‐dimensional equations that are then solved using the MacCormack explicit finite‐difference scheme. The results of the mathematical model are compared for verification to experimental data obtained on a laboratory test facility. The agreement between the computed and measured water levels is satisfactory. However, the computed wave speed is slower than the measured wave speed when the flow is near critical conditions. Reflection technique works well, except in regions close to the entrance of a bend.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 115 • Issue 11 • November 1989
Pages: 1479 - 1495
Copyright
Copyright © 1989 ASCE.
History
Published online: Nov 1, 1989
Published in print: Nov 1989
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