Abstract
Large-eddy simulations are carried out to investigate turbulent flow in a stably-stratified open channel with longitudinal ridges along the bottom wall. The Boussinesq form of the governing equations is solved for different levels of stratification. The results of the simulations show that stratification creates two separate regions: a free-surface region, characterized by the presence of the thermocline, where vertical large-scale motion is strongly inhibited and a wall region, characterized by reduced vertical mixing at the turbulent scales and enhanced large-scale secondary flows that tend to mix mass and momentum in the cross-stream plane.
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© 2004 Springer Science+Business Media Dordrecht
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Armenio, V., Falcomer, L., Carnevale, G.F. (2004). Large-Eddy Simulation of a Stably Stratified Flow over Longitudinally Ridged Walls. In: Friedrich, R., Geurts, B.J., Métais, O. (eds) Direct and Large-Eddy Simulation V. ERCOFTAC Series, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-2313-2_32
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DOI: https://doi.org/10.1007/978-1-4020-2313-2_32
Publisher Name: Springer, Dordrecht
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