h. k. moffatt- large scale motions in a turbulent boundary layer; waves versus eddies

17

LARGE SCALE MOTIONS IN A TURBULENT BOUNDARY IAYER; WAVES VERSUS EDDIES by H . K . Moffatt Abstract The dynamics of those fluctuating motions in a turbulent boundary l q e r which have a scale comparable with the scale of the mean flow i s considered. Motions on this scale,'large eddies; can arise through interactions o f Fourier components of the velocity field having a much smaller scale, T h e large eddies are convected and distorted by t h e mean flow and thqlose energy to small scale turbulence by a process that may (for want o f better) be represented by an eddy viscosity, statistical structure o f the,la rge eddies. considered, t h e first o f which highlights the wave-nature of possible modes of motion, and the second of which places the emphasis on the distortion and development of anisotropy i n certain other modes of motion. The methods are to some extent complementary, b u t i t i s argued that the second method i physically more appropriate in treating disturbances that are localised in the y direction. The equilibrium of these processes determines (in principle) the T wo methods of analysis are Some of the features of the correlation curves obtained by Grant (1958) are interpreted in terms of initially isotropic turbulence that h a s been subjected to a uniform mean shear. comparison with experiment, and the indications are that this i s an approach that merits further study. The shear induces an anisotropy that admits http://moffatt.tc

Upload: yokdm

Post on 06-Apr-2018

221 views

Category:

Documents

1 download

Report

Download

Embed Size (px):

TRANSCRIPT

Page 1: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 1/16

Page 2: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 2/16

Page 3: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 3/16

Page 4: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 4/16

Page 5: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 5/16

Page 6: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 6/16

Page 7: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 7/16

Page 8: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 8/16

Page 9: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 9/16

Page 10: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 10/16

Page 11: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 11/16

Page 12: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 12/16

Page 13: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 13/16

Page 14: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 14/16

Page 15: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 15/16

Page 16: H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

8/3/2019 H. K. Moffatt- Large Scale Motions in a Turbulent Boundary Layer; Waves Versus Eddies

http://slidepdf.com/reader/full/h-k-moffatt-large-scale-motions-in-a-turbulent-boundary-layer-waves-versus 16/16

Y. Hattori and H.K. Moffatt- Evolution of toroidal magnetic eddies in an ideal fluid

moffatt & nichol

Southern Ocean Fronts and eddies

Eddies Windows Admin Interview Questions

H.K. Moffatt- The Topology of Turbulence

H.K. Moffatt- George Keith Batchelor

H.K. Moffatt- KAM-Theory

Eddies: Continuously Adaptive Query processing

Eddies of the California Current System: Physical and ...This paper reviews eddies and their ecological effects in the California Current System (CCS). The importance of eddies lies

SATELLITE PICTURES OF MESOSCALE EDDIES

Characterizing Productivity of Geostrophic Eddies

Automated Microreactor Optimisation of the Swern-Moffatt ...mms.technologynetworks.net/posters/0730.pdf · Swern-Moffatt oxidation We investigated the Swern-Moffatt oxidation of benzylalcohol

Impacts of Eddies and Mixing on Plankton Community Structure and Biogeochemical ...ocb.whoi.edu/EDDIES/eddies_proposal.pdf · 2005-06-08 · Impacts of Eddies and Mixing on Plankton

Test and learn strategy chris moffatt

Eddies New Proposal 1

Leeuwin Current Eddies

Robin Moffatt, WM Morrisons plc

Adaptive Query Processing with Eddies

Bulk handling facilities - Moffatt & Nichol

"Inspection and rehabilitation | Moffatt & Nichol"

Moffatt Photography Pricing Guide 2012

Tracey Moffatt: Body Remembers - TarraWarra Museum of Art€¦ · Tracey Moffatt: Body Remembers . 23 March – 19 May 2019 . Tracey Moffatt, Bedroom 2017, from the series Body Remembers

Chapter 7: Atmospheric circulations Scales of atmospheric motions Scales of atmospheric motions Eddies - big and small Eddies - big and small Local wind

H.K. Moffatt- Turbulence in Conducting Fluids

Lauren Moffatt Spring 2011 Lookbook

W.P. Wood and H.K. Moffatt- Large and Small Scale Motions in Kinematic Dynamos

Moffatt Funding

Synoptic Eddies in the Ocean

THE MARINE LAYER AND COASTAL EDDIES THE MARINE LAYER AND COASTAL EDDIES

H.K. Moffatt- Magnetic eddies in an incompressible viscous fluid of high electrical conductivity

H.K. Moffatt- The Earth's Dynamo

H.K. Moffatt- Aspects of Dynamo Theory

Matthew moffatt evaluation_proper_finished

Moffatt fuse march 7th 2017

H.K. Moffatt- Geophysical and Astrophysical Turbulence