The Nature of High Reynolds Number Turbulence

The Nature of High Reynolds Number Turbulence's image
Created: 2008-11-06 17:20
Institution: Isaac Newton Institute for Mathematical Sciences
Description: Turbulence is a notoriously difficult subject. Our attempts to understand it tend to consist of an uneasy mix of plausible but uncertain hypotheses, deterministic but highly simplified cartoons, and vast, complex data sets.

For the small scales in turbulence this mixture of hypothesis, theory and experiment is given some unity by the phenomenological picture established by Richardson, Taylor and Kolmogorov. This phenomenology paints a picture of cascades of energy and information from large-scale eddies down to small, and of universal features of these cascades, provided the Reynolds numbers is large enough. In some sense this vision has worked well, providing a convenient conceptual framework within which many empirical observations can be rationalised. However, it was clear from the outset that this was too simplistic a point of view and half a century later there remain many fundamental unanswered questions. For example, exactly what do we mean by an eddy or a cascade, and how should we interpret cascade-like arguments in terms of the evolving morphology of the vorticity field? Indeed, what is the spatial structure of the vorticity field and how does this relate to the observed energy spectra?

Read more at: http://www.newton.ac.uk/programmes/HRT/
 

Media items

This collection contains 168 media items.

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Media items

2d-3d energy exchanges in a homogeneous thin-aspect-ratio ocean

   543 views

Straub, D (McGill)
Friday 12 December 2008, 12:00-12:30
Rotating Stratified Turbulence and Turbulence in the Atmosphere and Oceans

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Fri 16 Jan 2009


A mechanism for magnetic field reversals

   375 views

Petrelis, F (ENS Paris)
Tuesday 02 December 2008, 15:00-16:00

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Mon 29 Dec 2008


A mechanism for turbulent drag reduction by polymers

   760 views

Adrian, R (Arizona State)
Tuesday 09 September 2008, 14:00-14:20

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Mon 22 Sep 2008


A role of spectral turbulence simulations in developing HPC systems

   344 views

Yokokawa, M (RIKEN)
Friday 26 September 2008, 15:20-16:05
Prospects of High Performance Computing in Turbulence Research

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Wed 5 Nov 2008


A simple model for solar iso-rotation contours

   153 views

Balbus, S (ENS Paris)
Thursday 27 November 2008, 15:00-16:00

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Mon 29 Dec 2008


A simple model for the log-law region of a boundary layer

   505 views

Davidson, P (Cambridge)
Monday 08 September 2008, 16:50-17:10

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Sun 21 Sep 2008


An event-based description of the heat-flux time series in an atmospheric boundary layer

   464 views

Narasimha, R (Indian Institute of Science)
Thursday 11 September 2008, 15:50-16:10

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Wed 8 Oct 2008


Anisotropic pressure and acceleration spectra in uniform shear flow

   360 views

Tsuji, Y (Nagoya)
Tuesday 30 September 2008, 09:30-10:00

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Wed 22 Oct 2008


Beyond Lighthill: three ways to stay close to balance

   577 views

McIntyre, ME (Cambridge)
Wednesday 10 December 2008, 09:30-10:00

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Thu 15 Jan 2009


Bifurcation phenomena in the flow through a sudden expansion in a circular pipe

   1,122 views

Seddon, J (Manchester)
Friday 12 September 2008, 12:10-12:30

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Thu 9 Oct 2008


Bottleneck crossover between classical and quantum superfluid turbulence

   351 views

Nazarenko, SV (Warwick)
Monday 29 September 2008, 14:00-14:30

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Mon 20 Oct 2008


Boundary layer transition by discrete and continuous modes

   377 views

Durbin, R (Iowa State)
Wednesday 10 September 2008, 11:30-11:50

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Mon 6 Oct 2008


Bounds on the energetics and entropy production of a buoyancy forced ocean

   333 views

Winters, KB (UC, San Diego)
Friday 12 December 2008, 09:30-10:00

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Fri 16 Jan 2009


Capturing reconnection in Navier-Stokes and resistive MHD dynamics

   367 views

Bustamante, MD (Warwick)
Wednesday 01 October 2008, 12:10-12:30

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Wed 22 Oct 2008


Cascades, thermalisation and eddy viscosity in helical Galerkin truncated Euler flows

   408 views

Brachet, ME (ENS, Paris)
Friday 31 October 2008, 14:40-15:40
Euler at Newton: The Inviscid Equations

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Wed 24 Dec 2008


Closure theories for inhomogeneous turbulence

   267 views

Rubinstein, R (NASA Langley)
Thursday 02 October 2008, 17:40-18:10

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Thu 23 Oct 2008


Clustering of inertial particles in shear flows

   365 views

Casciola, CM (Sapienza Università di Roma)
Thursday 02 October 2008, 16:30-17:00

Collection: The Nature of High Reynolds Number Turbulence

Institution: Isaac Newton Institute for Mathematical Sciences

Created: Thu 23 Oct 2008


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