Application of Space-Time Conservation Method to Analysis of One-Dimensional Unsteady Flow in Channels with Irregular Geometries
Abstract
From among the methods of computing one-dimensional unsteady open channel flow, space-time conservation method is picked out, which has flux limiter functions to prevent numerical oscillations and whose settings of various boundary conditions are easy to handle, that are decided by water control structures, discharge, water depth, etc. By extension of the scheme we propose a new algorithm of computing the flow in channels with irregular geometries where the channel breadth and the bed slope change variously along the flow. It is showed that the new scheme is effective as a result of computing steady quiescent flow, comparing numerical steady solution with the steady water surface obtained by calculation of water surface profile, and comparing numerical unsteady solution with the time variation of the water depth obtained by the experiment in rectangular channels that have breadth and bed slope changing.
- Publication:
-
Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering
- Pub Date:
- 2012
- Bibcode:
- 2012TJSID..79..207K