Large eddy simulation of a vertical buoyant jet in a vegetated channel--论文发表-槐文信课题组

简介

Abstract Predicting the flow and dilution of a buoyant jet in vegetated regions is widely
applied in ecology and engineering practices. Large eddy simulation is used to study a
vertical buoyant jet that was injected into a cross-flow with emergent rigid vegetation. This
simulation successfully reproduces the jet behaviour and the spatio-temporal evolution of
vortex structures of turbulent jet with vegetation. The time-averaged velocity and temperature
field are compared with the experimental results. The similarities and differences between
the tests with and without vegetation are also studied. The existence of vegetation
diminishes the channel velocity, thereby significantly increasing the jet penetration height
and dilution. Spectral analysis is used to investigate the lengths of the vortices
corresponding to the dominant frequency at different locations in the flow field.