Modelling of Complex Urban Systems and Areas of Possible...

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Modelling of Complex Urban Systems and Areas of Possible Improvements

Dr Žarko StevanovićBelgrade University

Institute of Nuclear Sciences - VINČ[email protected]


MODELLING ‐ CONCEPT

Natural Phenomena

Modelling

Quantification - CFD


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.


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


Heat Islands EffectsR

ural

Are

as

Urb

an A

reas


Street Canyon Effects

Isolated Roughness Flow

Wake Interface Flow Skimming Flow


Urban Pollution EffectsPoint source pollution :- Chimney

Line source pollution: – Urban Traffic


Experimental:

• Wind – tunnel investigation

Modelling:

• Computational Fluid Dynamics ( CFD )

MODELLING BUILT ENVIRONMENT ‐ METHODOLOGIES


Experimental – Wind Tunnel


CFD – E X A M P L E S


Heat Islands EffectsUrban Model:• Buildings• Streets• Greenery• Water Surfaces

Ž. Stevanović, 2013

Surface – FasadeTemperatures


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


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



Outdoor / Indoor Impact


Fasade Design DetailesNatural Ventilation Study

Velocity Vectors andAir Stream Lines


Indoor Thermal Comfort

Open Office Model

Predicted Mean VoteDistribution



Indoor Air Quality

Theatre “Terazije” - Belgrade Model

Iso-surface of CO2 concentration

M. Kavgić and Ž. Stevanović, 2007


Indoor Risk Fire Assessment

Visualization of 100 oC temperature iso-surface, spreading during the fire

3D Geometry of Belgrade AirportTerminal 2



Contact details Dr Žarko Stevanović[email protected]+381 63 8468 799

Modelling of Complex Urban Systems and Areas of Possible...

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