An expert review of recent progress in the study of turbulentflows with a focus on recently identified organizedstructures. This book reviews the recent progress in the study of the turbulentflows that sculpt the Earth s surface, focusing inparticular on the organized structures that have been identified inrecent years within turbulent flows. These coherent flowstructures can include eddies or vortices at the scale ofindividual grains, through structures that scale with the flowdepth in rivers or estuaries, to the large-scale structure of flowsat the morphological or landform scale. These flow structuresare of wide interest to the scientific community because they playan important role in fluid dynamics and influence thetransport, erosion and deposition of sediment andpollutants in a wide variety of fluid flowenvironments. Scientific knowledge of these structures has improved greatlyover the past 20 years as computational fluid dynamics hascome to play an increasing important part in building ourunderstanding of coherent flow structures across a broad rangeof scales. Chapters comprise a series of major, invited papers and aselection of the most novel, innovative papers presented atthe second Coherent Flow Structures Conference held August 3-5,2011 at Simon Fraser University in Burnaby, BritishColumbia. Chapters focus on six major themes: * Dynamics of coherent flow structures (CFS) in geophysicalflows * Interaction of turbulent flows, vegetation and ecologicalhabitats * Coherent structure of atmospheric flows * Numerical modeling of coherent flow structures * Turbulence in open channel flows * Coherent flow structures, sediment transport and morphologicalfeedbacks.
List of Contributors vii
Preface xi
About the Companion Website xiii
1 What is a Coherent Flow Structure in 1 (16)
Geophysical Flow?
Jeremy G. Venditti
Richard J. Hardy
Michael Church
James L. Best
2 Structure of Turbulent Boundary Layers 17 (8)
Ronald J. Adrian
3 Structural Attributes of Turbulent Flow 25 (18)
over a Complex Topography
Ricardo Mejia-Alvarez
Julio M. Barros
Kenneth T. Christensen
4 Coherent Flow Structures in the Pore 43 (20)
Spaces of Permeable Beds underlying a
Unidirectional Turbulent Boundary Layer: A
Review and some New Experimental Results
Gianluca Blois
James L. Best
Kenneth T. Christensen
Richard J. Hardy
Gregory H. Sambrook Smith
5 Instabilities in Stratified Shear Flow 63 (10)
Gregory A. Lawrence
Edmund W. Tedford
Jeffrey R. Carpenter
6 Scalar Turbulence within the Canopy 73 (24)
Sublayer
Gabriel G. Katul
Daniela Cava
Mario Siqueira
Davide Poggi
7 On the Structure of Wall Turbulence in 97 (14)
the Thermally Neutral Atmospheric Surface
Layer
Michele Guala
Jeff LeHew
Meredith Metzger
Beverley J. McKeon
8 Critical Reflections on the Coherent Flow 111 (24)
Structures Paradigm in Aeolian Geomorphology
Bernard O. Bauer
Ian J. Walker
Andreas C.W. Baas
Derek W.T. Jackson
Cheryl McKenna Neuman
Giles F.S. Wiggs
Patrick A. Hesp
9 Coherent Flow Structures in Vegetated 135 (14)
Channels
Heidi Nepf
Jeffrey Rominger
Lijun Zong
10 Coherent Eddy Structures over Plant 149 (12)
Canopies
Roger H. Shaw
Edward G. Patton
John J. Finnigan
11 SPIV Analysis of Coherent Structures in 161 (14)
a Vegetation Canopy Model Flow
Laurent Perret
Tony Ruiz
12 Calculation and Eduction of Coherent 175 (24)
Flow Structures in Open-Channel Flow Using
Large-Eddy Simulations
Thorsten Stoesser
13 Detection and Analysis of Coherent Flow 199 (16)
Structures in a Depth-Limited Flow over a
Gravel Surface
Richard J. Hardy
James L. Best
Timothy I. Marjoribanks
Daniel R. Parsons
Nicholas J. Rosser
14 COHSTREX: Coherent Structures in Rivers 215 (16)
and Estuaries Experiment
Andrew T. Jessup
C. Chris Chickadel
Stefan A. Talke
Alexander R. Horner-Devine
15 Intermittent Suspension and Transport of 231 (12)
Fine Sediment over Natural Tidal Bedforms
Eva Kwoll
Christian Winter
Marius Becker
16 Large-Scale Coherent Flow Structures in 243 (18)
Alluvial Pools
Bruce J. MacVicar
Lana Obach
James L. Best
17 From Macroturbulent Flow Structures to 261 (14)
Large-Scale Flow Pulsations in Gravel-Bed
Rivers
Genevieve A. Marquis
Andre G. Roy
18 Coherent Secondary Flows over a 275 (14)
Water-Worked Rough Bed in a Straight Channel
Stuart J. McLelland
19 Coherent Flow Structures, Initiation of 289 (20)
Motion, Sediment Transport and
Morphological Feedbacks in Rivers
Panayiotis Diplas
Clinton L. Dancey
20 Turbulence Modulation by Suspended 309 (14)
Sediment in a Zero Mean-Shear Geophysical
Flow
Sean J. Bennett
Joseph F. Atkinson
Yinting Hou
Michael J. Fay
21 Effect of Migrating Bed Topography on 323 (18)
Flow Turbulence: Implications for Modelling
Sediment Transport
Arvind Singh
Efi Foufoula-Georgiou
22 Turbulence Structure and Sand Transport 341 (18)
over a Gravel Bed in a Laboratory Flume
Daniel G. Wren
Roger A. Kuhnle
Eddy J. Langendoen
Corrado Pellachini
23 Coherent Structures and Mixing at a 359 (12)
River Plume Front
Alexander R. Horner-Devine
C. Chris Chickadel
Daniel G. MacDonald
24 Interfacial Waves as Coherent Flow 371 (14)
Structures associated with Continuous
Turbidity Currents: Lillooet Lake, Canada
Amy Menczel
Ray Kostaschuk
Index 385