# The Nature of High Reynolds Number Turbulence

Created: | 2008-11-06 17:20 |
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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.

### Media items

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

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

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

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

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

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

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

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

#### An Introduction to Rotating Stratified Turbulence and Turbulence in the Atmosphere and Oceans

Hunt, J (UCL)

Monday 08 December 2008, 09:20-09:30

**Collection**:
The Nature of High Reynolds Number Turbulence

**Institution**:
Isaac Newton Institute for Mathematical Sciences

**Created**:
Tue 13 Jan 2009

#### Angular momentum transport and dynamos in magnetised rotating stratified systems

Tobias, S (Leeds)

Tuesday 09 December 2008, 14:30-15:00

**Collection**:
The Nature of High Reynolds Number Turbulence

**Institution**:
Isaac Newton Institute for Mathematical Sciences

**Created**:
Thu 15 Jan 2009

#### Anisotropic pressure and acceleration spectra in uniform shear flow

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

#### Application of statistical mechanics to the modeling of potential vorticity or density mixing

Sommeria, J (LEGI-CNRS)

Thursday 11 December 2008, 16:30-17:00

**Collection**:
The Nature of High Reynolds Number Turbulence

**Institution**:
Isaac Newton Institute for Mathematical Sciences

**Created**:
Thu 15 Jan 2009

#### Beyond Lighthill: three ways to stay close to balance

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

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

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

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

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

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

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

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

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