Author/Authors :
Soualmia, Amel Ecole Nationale d@Ingénieurs de Tunis, LMHE, Tunisie , Zaouali, Sahbi Ecole Nationale d@Ingénieurs de Tunis, LMHE, Tunisie , Labiod, Chouaib Université de Jijel - Laboratoire de Génie Géologique, Algérie
Title Of Article :
MODELING OF SECONDARY MOTIONS DRIVEN BY THE TURBULENCE ANISOTROPY IN CLOSED AND OPEN CHANNELS
Abstract :
The capabilities of Reynolds stress models to predict the hydrodynamic response of open channel turbulent flows to fixed bed roughness heterogeneity are analyzed. An algebraic model is used, issued from the Reynolds stress transport model of Gibson and Launder(1978), adapted by Gibson and Rodi (1989) to simulate the effects of the wall and the free surface on the turbulence anisotropy. This model is first tested in parallel free surface flows with smooth or rough bottom. Then, it is applied to non-parallel closed or open channel flows with different configurations of the wall roughness for which experimental results are available.
NaturalLanguageKeyword :
free surface flows , wall friction , anisotropy , secondary flows , turbulence , roughness
JournalTitle :
Lebanese Science Journal
