Journal
ADVANCES IN WATER RESOURCES
Volume 29, Issue 11, Pages 1598-1607Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.advwatres.2005.11.011
Keywords
open channel flow; hydrodynamics; Boussinesq equation; non-uniform flow
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A numerical experiment is carried out to investigate the suitability' of a Boussinesq-type momentum model for simulating transcritical flows at short length transitions in open channel flow measuring structures. Two one-dimensional Boussinesq-type equation models, which incorporate different degrees of dynamic pressure corrections, are considered for this purpose. A finite difference method is employed to discretise and solve the equations. The models are then applied to simulate different test cases for flows in such channels with predominant non-hydrostatic pressure distribution effects. A comparison of the computed results with the corresponding experimental data is presented. Results of this study reveal that the proposed model, which includes a higher-order correction for the effect of the centrifugal pressure, describes well even relatively abrupt changes from sub- to super-critical flow state. (c) 2005 Published by Elsevier Ltd.
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