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© CADFEM 2015 Forum Digitale Städte - ACUM 2015 Bremen

Forum Digitale Städte - ACUM 2015 Bremen

Stefan Trometer, CADFEM GmbH

© CADFEM 2015

Exploring Urban Simulation


3D city model of Frankfurt

Generated and hosted by

virtualcitySYSTEMS

CityGML standard = data model

NOT only visualization

About 200.000 building objects

Regularly updated database

Automated processes indispensable

Urban complexity is mandatory

for many fields of application

(wind, climate, risk mitigation, …)

Semantic 3D City Models

© CADFEM 2015



Current Fields of Application

Urban Simulation

&

Urban Blast

Flooding & Tsunami

Urban Air Flow

Smoke & Pollution

Crowd Movement

© CADFEM 2015



Current Technology Partners

Urban Simulation

&

Urban Air Flow

Crowd Movement

Novosibirsk State University

of Architecture

and Civil Engineering

Urban Blast

Flooding & Tsunami

Smoke & Pollution

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© CADFEM 2015

Demonstrators R&D Projects


© CADFEM 2015

Urban Blast Protection


• Project Blast pressure wave propagation

in urban environments (DETORBA)

• Type Funded research project (BMBF)

Web-Application for model preparation Interface to ANSYS WorkbenchGeometry optimization for explicit simulation Automated process implementation Solver Autodyn, LS-Dyna, ApolloOptimized post-processingResult visualization in Web-Application Sensitivity & robustness analysis OptiSLangOptimization of structural members

© CADFEM 2015

Urban Air Flow


• Project High-Rise wind loading

and pedestrian air flow comfort

• Type Demonstrator

Pedestrian comfort

at ground levelVelocity contours

at a height of 50m and 150m

Model preparation

Measured

wind profiles

Cooperation with

© CADFEM 2015

Turbulence Modeling in Urban Space


• Project Wind flow modeling in the vicinity

of complex buildings within an urban

environment

• Type PhD project of S. Valger (Prof. Fedorova)

Distribution of time-averaged

static pressure

© CADFEM 2015

Urban Air Quality & Climate


• Project Transient urban smoke development under

steady-state air flow conditions

• Type Demonstrator Realistic fire

scenarioSteady-state air flow

conditions Target

→ Urban air quality & pollution

→ Urban climate

Temperature development of a

roofing fire scenario modeled with

additional variable transport

© CADFEM 2015

Geometry Optimization for CFD


• Project Optimizing city model geometry

for individual CFD simulation


Pre-optimized CityGML

model export

Enhancements in meshing city

models using the ANSYS AIM

Shrink Wrap Method

Target

→ Increasing automated meshing for urban complexity

→ Decreasing labor for high quality CFD models

Cooperation with

© CADFEM 2015

Implementation of Building Models (BIM)


• Project Implementation of detailed IFC | BIM

building models into city models


IFC|BIM model from

Architecture & Engineering

Integration into city models

for local & urban simulations

Import

ANSYS Workbench

Urban steady-state air flow

condition and evaluation of wind

loading on building windows

Target→ Tool to create simulation models

with different levels of detailbased on IFC building models

© CADFEM 2015

River Flooding & Tsunami Protection


• Project River flooding & Tsunami protection

in urban environments


3D simulation of a Tsunami

impacting a building with ANSYS Fluent

2D model of the Elbe for river

flooding scenarions

(Source: TU-Dresden)

Global Tsunami risk analysis with the GFZ

early warning system TRIDEC Cloud

showing a forecast scenario for Singapore

(Source: GFZ Potsdam)

→ Submitted research

proposal with subcontract

for ANSYS Germany

© CADFEM 2015

Urban Automotive Engineering


Contact with AUDI and MAN Trucks – Topics

• Driving simulator in virtual cities

• Car body design based on real street conditions (road scan)

• Autonomous driving

• Car-to-car network

in urban environments

Source: City of Zurich

© CADFEM 2015

Urban Crowd Movement


• Project Crowd simulation in urban environments

for evacuation and major events


Model definition

→ Urban evacuation scenario with 2.000 people

→ based on semantic city model data of building usage

→ Transient simulation result

→ Result: Evacuation takes less than 6 minEvacuation Area

Rescue Zone

Rescue Zone

Cooperation with

© CADFEM 2015

Urban Waste Heat Detection


• Topic Waste heat detection by unmanned aerial vehicles

• Type Research proposal (BMWi)

• Partners Hangwind | Fraunhofer Morgenstadt (IAO, IOSB)

© CADFEM 2015

Questions?


CADFEM GmbH

Dr.-Ing. Stefan Trometer

New Business Development - Digital City

Marktplatz 2

85567 Grafing b. München

Germany

Tel: +49-(0)8092-7005-35

Fax: +49-(0)8092-7005-570

E-Mail: [email protected]

www.cadfem.de

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