Isaac Newton Institute for Mathematical Sciences

Turbulence

January - June 1999

Organisers: GF Hewitt (Imperial College), PA Monkewitz (Lausanne), N Sandham (QMW), JC Vassilicos (Cambridge)

Research Programme on Turbulence

Symposium on

Turbulent Systems: Problems and Opportunities

Isaac Newton Institute for Mathematical Sciences,

Cambridge, UK

January 11^th- 12^th, 1999

Closing date extended to 8th Dec 98

Background Organisation Schedule Application Form Further Information

Background

Turbulence is ubiquitous in industrial processes. Engineers need to understand turbulent flows in order to control them, design for their adverse effects or utilise them for best effect (as in mixing processes). In all cases, prediction is a necessary element in the engineering design calculations.

The development over the past 10-20 years of usable Computational Fluid Dynamics (CFD) codes has produced a sea change in the design and development approach, allowing products to be brought to the market much more rapidly and economically. However, CFD codes are necessarily based on turbulence models whose parameters have to be deduced from measurements. The generality of these parameters is questionable, and the mathematical aspects of the models have been inadequately explored.

The practical importance of turbulence has led The Royal Academy of Engineering to launch an Initiative on Turbulence, the most important outcome of which was the definition and agreement of a 6-month Isaac Newton Institute (INI) Research Programme to try to evaluate the fundamental issues and to develop a strategy to address these issues for the future. The Isaac Newton Institute is based in a purpose-built building which is designed to allow leading mathematical scientists to address together important issues in mathematical sciences.

This Symposium is the opening one in the Research Programme and is intended to set the scene for the subsequent work in the Programme. Leading industrial practitioners and leading specialists in turbulence will come together to outline the needs of industry for predictive methods for turbulence systems and to agree ways forward in addressing these needs.

Organisation

The Symposium is being organised by the Industrial Working Party (representing The Royal Academy of Engineering) of the INI Research Programme on Turbulence, in collaboration with the Organisers of the Research Programme. The Industrial Working Party is as follows:

M.W. Reeks (Joint Research Centre, Ispra): Chairman
J. Coupland (Rolls-Royce)
R.P. Cleaver (BG Technology)
D.P. Hills (British Aerospace)
A.G. Hutton (DERA)
J.R. Noyce (BNFL/Magnox Electric)
M.J. Rabbitt (British Energy)
D.J. Thomson (Met. Office)

The Organisers of the INI Research Programme are as follows:

J.C. Vassilicos (DAMTP, Cambridge)
G.F. Hewitt (Imperial College, London)
P.A. Monkewitz (EPF, Lausanne, Switzerland)
N.D. Sandham (Queen Mary & Westfield College, London)

The Symposium will be held at the Isaac Newton Institute, 20 Clarkson Road, Cambridge, CB3 0EH, UK (Tel: 01223 335999, Fax: 01223 330508.

Copies of presented material will be issued to all delegates and lunches on the two days, a dinner on the first day, accommodation for one night and coffee will also be provided. To cover the costs of these items, a fee of £150 will be charged to registrants. Support towards this fee may be feasible for UK Academics who should apply to INI for details.

The Symposium is open to all those who are interested in the field, but participation from those involved in predicting industrial turbulent flows will be particularly welcomed.

For each technical area covered, the session will begin with presentations, identifying industrial problems and opportunities. This will be followed by a panel discussion to promote interaction between the industrial and academic participants in identifying turbulence modelling requirements and setting test problems. Finally, a rapporteur will sum up the main points from the session and will prepare a short written report which will serve as a general guideline and theme for the work of the Research Programme in this area.

The schedule for the meeting is as follows:

Monday, January 11^th 1999

1000-1005: Welcome by the Director

1005-1100: Opening presentation

Relating problems of turbulence to industrial flows: now and in the future by J.C.R. Hunt, Cambridge.

1100-1115: Coffee

1115-1245: External Aerodynamic Flows

Topics to include: Highly skewed flows, three-dimensional flows, trailing edge flows, shock-boundary layer interaction, junction flows, separated vortical flows and laminar-turbulent transition.

Chairman: D.P. Hills, British Aerospace
Speakers: A.R.B. Gould, British Aerospace; A.G. Hutton, DERA

1245-1400: Lunch

1400-1530: Internal Aerodynamic Flows

Topics to be covered: Industrial CFD in gas turbine design. Turbulent and transitional flow physics in the aerodynamics of gas turbines such as unsteady wake induced transition. Heat transfer in 3D turbine boundary layers and film cooling, combusting flows.

Chairman: P. Stow, Rolls-Royce
Speakers: P. Stow, Rolls-Royce; J. Coupland, Rolls-Royce

1530-1600: Tea

1600-1730: Internal Flows with Heat Transfer

Topics covered: Buoyancy driven and mixed convective flows, two-equation modelling and solution quality.

Chairman: M.J. Rabbitt, British Energy/Magnox Electric/BNFL
Speakers: S. Hickmott, British Energy, R.M. Smith, British Energy

Tuesday, January 12^th 1999

0930-1100: Flows with Heat and Mass Transfer

Topics covered: Mixing and combusting flows including gas dispersion, fires and explosions. Compressible flows. Flow around obstacles, two-phase multicomponent flows.

Chairman: R.P. Cleaver; BG Technology
Speakers: R.P. Cleaver, BG Technology; P.S. Cumber, BG Technology

1100-1130: Coffee

1130-1300: Atmospheric/Environmental Flows

Topics covered: Circulation models, large eddy simulation, atmospheric surface layer, concentration fluctuations, cloudy convection, flow over hills.

Chairman: J.C.R. Hunt, Cambridge
Speakers: D.J. Thomson, S. Derbyshire, N. Woods, Met Office

1300-1430: Lunch

1430-1615: Caucus discussion groups in the major areas to address strategy for future work and in particular the work of the INI Research Programme.

(Tea available 1545-1615)

1630-1730: Final Summary Session

The findings of the Caucus groups will be reported and common themes identified for the Research Programme

Chairman: M.W. Reeks, JRC, Ispra