1. Modelling of Complex Urban Systems and Areas of Possible Improvements
Dr Žarko Stevanović
Belgrade University
Institute of Nuclear Sciences - VINČA

2. MODELLING - CONCEPT
Natural Phenomena
Modelling
Quantification - CFD

3. NATURAL PHENOMENA etc. Fluid Flow (Air Movement, Turbulence, Buoyancy)
Heat Transfer (Conduction, Convection, Radiation)
Mass Transfer (Pollution Dispersion)
Phase Changes (Vaporization, Solidification)
Combustion (Heat and Smoke Realize)
etc.

4. MODELLING BUILT ENVIRONMENT - SCOPE
Adaptations
Urban design: heat islands and street canyon effects
Building design and adaptations for protection against temperature, pollution, fire and flood risks
Mitigation
Urban design, structure and organization to promote low GHG emissions and healthy living
Energy efficiency / Low carbon design of buildings: impact on indoor environments

5. Heat Islands Effects
Rural Areas
Urban Areas

6. Street Canyon Effects Isolated Roughness Flow Skimming Flow
Wake Interface Flow
Skimming Flow

7. Urban Pollution Effects
Point source pollution :
- Chimney
Line source pollution:
– Urban Traffic

8. MODELLING BUILT ENVIRONMENT - METHODOLOGIES
Experimental:
Wind – tunnel investigation
Modelling:
Computational Fluid Dynamics ( CFD )

9. Experimental – Wind Tunnel

10. CFD – E X A M P L E S

11. Heat Islands Effects Urban Model: Buildings Streets Greenery
Water Surfaces
Surface – Fasade
Temperatures
 Ž. Stevanović, 2013

12. Street Canyon Effects Urban Model of Glasgow City Center
Horizontal components of velocity vector at the George Square
Surface – Fasade Air Velocity
 D. Mumović and Ž. Stevanović, 2002

13. Urban Pollution Effects
Urban Model of Copenhagen City Center
New building fasade NOx distribution – Natural ventilation study
Surface – Fasade NOx Distribution
 Ž. Stevanović, 2008

14. Outdoor / Indoor Impact
Fasade Design Detailes
Natural Ventilation Study
Velocity Vectors and
Air Stream Lines
 Ž. Stevanović, 2008

15. Indoor Thermal Comfort
Open Office Model
Predicted Mean Vote
Distribution
 Ž. Stevanović, 2012

16. Indoor Air Quality Theatre “Terazije” - Belgrade Model Iso-surface of
CO2 concentration
 M. Kavgić and Ž. Stevanović, 2007

17. Indoor Risk Fire Assessment
3D Geometry of Belgrade Airport
Terminal 2
Visualization of 100 oC temperature iso-surface, spreading during the fire
 Ž. Stevanović, 2006

18. Dr Žarko Stevanović www.vinca.rs zare@vinca.rs +381 63 8468 799
Contact details
Dr Žarko Stevanović