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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Reynolds stress modelling of open channel flow with suspended vegetation
Reynolds stress modelling of open channel flow with suspended vegetation
Author : THEOHARRIS KOFTIS(1), PANAYOTIS PRINOS(2)
ABSTRACT
In this work the effect of suspended vegetation on open channel flow is studied numerically. The VARANS (Volume-
Averaged-Reynolds-Averaged-Navier-Stokes) equations are solved numerically in conjunction with the Reynolds Stress
Model (RSM) of Ayotte et al. (1999) turbulence model modified by Souliotis and Prinos (2011). The effect of the
vegetation density, defined by the parameter as the frontal area per unit volume, on the mean velocities and turbulence
characteristics is investigated by varying the vegetation density from 1.272 to 0.477. Also the effect of the relative gap
(height of the gap hg beneath the canopy over the total flow depth H) is studied with values of hg/H varying from 0.125 to
0.5. Numerical results are compared with experimental measurements of Plew (2011). Mean velocities and shear
stresses are found in good agreement for all cases. Discrepancies found between numerical and experimental normal
stresses are discussed.
File Size : 2,094,118 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 19/08/2015
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