Turbulence in Open-channel flows
Turbulence in open-channel flows holds both intellectual fascination
and great practical significance. The bursts and sweeps recently revealed
by modern measurements and computing techniques, the large boils bringing
to life the river surfaces, and the secondary current cells in rivers are examples of
phenomena assosicated with turbulence. Their complexity intrigues and challenges the
reasearcher. On the practical side, turbulent transport processes in rivers and
estuaries have broad consequences on such phenomena as the velocity distribution,
bed shear stress, energy loss, sediment transport, pollutant spreading and air
entrainment. Hence, the understanding of and the ability to predict turbulence
phenomena in open-channel flows are widely sought. A number of excellent books
have been written on channel hydraulics, but these do not deal with the detailed
effects of turbulence.
This monograph reviews the state-of-the-art on open-channel turbulence, and
treats especially certain unique features stemming from the presence of the
free surface and the bed of a river. The contents are in two parts :
Part 1 (Chapters 1-6) presents the statistical theory of turbulence, and Part 2
(Chapters 7-12) the coherent structures in open-channel flows and boundary layers.
The book is intended for advanced students and researchers in hydraulic engineering,
fluid mechanics, environmental sciences and related disciplines.
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