modelling of complex urban systems and areas of possible...
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Blue Green Dream © 2012. All rights reserved.2013.
Modelling of Complex Urban Systems and Areas of Possible Improvements
Dr Žarko StevanovićBelgrade University
Institute of Nuclear Sciences - VINČ[email protected]
Blue Green Dream © 2012. All rights reserved.2013.
MODELLING ‐ CONCEPT
Natural Phenomena
Modelling
Quantification - CFD
Blue Green Dream © 2012. All rights reserved.2013.
NATURAL PHENOMENA
• 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.
Blue Green Dream © 2012. All rights reserved.2013.
MODELLING BUILT ENVIRONMENT ‐ SCOPEAdaptations
• 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
Blue Green Dream © 2012. All rights reserved.2013.
Heat Islands EffectsR
ural
Are
as
Urb
an A
reas
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Street Canyon Effects
Isolated Roughness Flow
Wake Interface Flow Skimming Flow
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Urban Pollution EffectsPoint source pollution :- Chimney
Line source pollution: – Urban Traffic
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Experimental:
• Wind – tunnel investigation
Modelling:
• Computational Fluid Dynamics ( CFD )
MODELLING BUILT ENVIRONMENT ‐ METHODOLOGIES
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Experimental – Wind Tunnel
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CFD – E X A M P L E S
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Heat Islands EffectsUrban Model:• Buildings• Streets• Greenery• Water Surfaces
Ž. Stevanović, 2013
Surface – FasadeTemperatures
Blue Green Dream © 2012. All rights reserved.2013.
Street Canyon EffectsUrban Model of Glasgow City Center
Surface – Fasade Air Velocity
Hor
izon
tal c
ompo
nent
s of
vel
ocity
vec
tor a
t the
Geo
rge
Squa
re
D. Mumović and Ž. Stevanović, 2002
Blue Green Dream © 2012. All rights reserved.2013.
Urban Pollution EffectsUrban Model of Copenhagen City Center
Surface – Fasade NOx Distribution
New
bui
ldin
g fa
sade
NO
x di
strib
utio
n –
Nat
ural
ven
tilat
ion
stud
y
Ž. Stevanović, 2008
Blue Green Dream © 2012. All rights reserved.2013.
Outdoor / Indoor Impact
Ž. Stevanović, 2008
Fasade Design DetailesNatural Ventilation Study
Velocity Vectors andAir Stream Lines
Blue Green Dream © 2012. All rights reserved.2013.
Indoor Thermal Comfort
Open Office Model
Predicted Mean VoteDistribution
Ž. Stevanović, 2012
Blue Green Dream © 2012. All rights reserved.2013.
Indoor Air Quality
Theatre “Terazije” - Belgrade Model
Iso-surface of CO2 concentration
M. Kavgić and Ž. Stevanović, 2007
Blue Green Dream © 2012. All rights reserved.2013.
Indoor Risk Fire Assessment
Visualization of 100 oC temperature iso-surface, spreading during the fire
3D Geometry of Belgrade AirportTerminal 2
Ž. Stevanović, 2006
Blue Green Dream © 2012. All rights reserved.2013.
Contact details Dr Žarko Stevanović[email protected]+381 63 8468 799