Themes and Special Sessions


Contributions to BBAA IX Colloquium will focus on:

  • Experimental, computational and analytical studies of vortex shedding, wakes 
  • Fluid-structure interaction 
  • Aerodynamics of bridges and cables
  • Aerodynamics of buildings 
  • Aerodynamics of trains and road vehicles 
  • Sports aerodynamics 
  • Computational Fluid Dynamics 
  • Environmental and non-stationary flows (tornadoes, hurricanes, thunderstorms) 
  • Performance-based wind engineering 
  • Wind Energy 
  • Wind and vegetation interaction

There will also be organised special sessions 

Submission to these special sessions is by invitation only. If you would like to present at any of the sessions please contact the organiser of the special session directly.

Special Session Description
Sports aerodynamics 

The session on Sports Aerodynamics includes the application of field measurements, wind tunnel test and/or numerical simulation (CFD) to assess the accuracy and reliability of these methods, to provide insight into aerodynamic processes and to improve the aerodynamic performance of athletes, vehicles and equipment.

Topics include – but are not limited to – cycling aerodynamics, sailing aerodynamics and skiing.

Session Organiser and Chair: Bert Blocken, Eindhoven University, The Netherlands,

Trains and road vehicles aerodynamics 

The role of aerodynamics in ground vehicles has risen to the top of vehicle manufacturers agendas as they strive to produce energy efficient and highly refined vehicles in the face of increasingly stringent CO2 targets and the need to engineer desirable electric  vehicles.

This session will address topics in external vehicle aerodynamics with a focus on understanding the flow-field and consequent loads on vehicles. The session will bring together contributions using both experimental and computational methods. The aim of the session is to provoke increased awareness and research in this important field.

Session Organiser and Chair: Martin Passmore, Loughborough University, UK,

Agricultural aerodynamics 

Every year the agriculture industry incurs significant economic loss due to crop damage from natural hazards and more specifically windstorms and associated impacts. The loss of yield adds increased difficulty in feeding the ever-growing world population and these events will continue to be a problem. 

We are now accepting abstracts on relevant subjects including but not limited to:

  • Physical, experimental and/or field testing of crop resistance
  • Damage assessment
  • Computational, numerical and/or analytical modeling
  • Dynamic and/or aeroelastic effects
  • Novel observational techniques and methods 

Session Organiser and Chair: Frank Lombardo, University of Illinois at Urbana-Champaign,

Experimental techniques in bluff body aerodynamics  Session Organiser and Chair: Alan Robins, University of Surrey, UK,
Computational techniques in bluff body aerodynamics

Wind engineering problems such as wind loading, peak surface pressure and peak concentration have challenged computational modelling for decades, albeit significant progress has been made mainly owing to the fast advance of computer power and its associated techniques, e.g. the computational fluid dynamics (CFD). 

The special session will discuss on the updated computational techniques and their applications on wind engineering and industrial aerodynamics problems, with an emphasis on mesh generation and its quality assessment, compromise of efficiency and accuracy of turbulence models including the high fidelity large-eddy simulation models, boundary conditions including the synthetic turbulence generation and moving boundary. 

New ideas and new techniques are particularly welcome to present in the special session.     

Session Organiser and Chair: Zhengtang Xie, University of Southampton, UK,

Air Flow in urban environments 

The session on Air Flow in Urban Environments addresses up-to-date progress and challenges in stemming research topics such as:

  • air flow in complex urban geometries, topographies and urban morphologies
  • ventilation impact of high rise buildings pollution dispersion and urban air quality
  • thermal and wind comfort
  • urban microclimate 
  • Urban Heat Island effect
  • mitigation measures to urban heating and their impact (e.g. vegetation, springlers, materials etc)
  • ventilation impact of high rise buildings
  • design of sustainable built environments based on air flow and ventilation considerations

The research methodology and techniques may span (but not limited to) analyses from wind tunnel or water channel experiments, field observations and Computational Fluid Dynamics simulations. 

Session Organiser and Chair: Marina Neophytou, University of Cyprus,

Wind effects of tornadoes on structures 

Tornadoes have produced substantial structural damage, injuries and deaths in the USA and around the world, which prompted an urgent need in research on tornadoes in all aspects.

This session will present the state-of-the-art of the cutting-edge research on wind characteristics of tornadoes and the actions of tornadoes on civil structures through numerical simulations (CFD simulations), experimental testing (laboratory tornado simulator) and reconnaissance surveys (immediately after real-world tornado striking). The related research will facilitate in properly determining the design tornadic wind loads, which will eventually achieve tornado-ready, tornado-resilient communities, saving lives and reducing property damage. 

Session Organiser and Chair: Yan, Guirong (Grace), Missouri University of Science and Technology, USA,

High-performance Wind Energy System and Effective Operation of Wind Farms

Session Organiser and Chair: Professor Qingshan Yang, Chongqing University, China,

Mitigating Wind-induced Disaster of Wind-sensitive Infrastructure

Session Organiser and Chair: Professor Qingshan Yang, Chongqing University, China,