ingenieurbüro für angewandte strömungsmechanik from gis to cfd - a cad solution for data transfer...

Ingenieurbüro für angewandte Strömungsmechanik

From GIS to CFD- a CAD solution for data transfer between GIS and CFD-

Hans-Wilfried Mindt

(Dipl.-Ing.)

Hans-W. Mindt und Wolfgang Ottow GbRIngenieurbüro für angewandte StrömungsmechanikKruppstr. 82 – 100, 45145 Essen, Germanyinfo@a-CFD.dewww.a-CFD.de

Ingenieurbüro für angewandte Strömungsmechanik

Contents

• Problem determination• Point‘s of interrests• Fileformates used by GIS• Model topology

– By splines (Points interpolated)– By points (Points exactly by using triangles)

• Solution• Summary• Discussion

Ingenieurbüro für angewandte Strömungsmechanik

•CFD solution in Environment

•Exhaust emission

•Condensation

•Fresh-air supply for turbines and generators

•Catastrophe scenarios

Problem determination

Ingenieurbüro für angewandte Strömungsmechanik

•CFD solution in Environment

•Power supply station

•Residential district

•Fresh-air supply for turbines and generators

•Catastrophe scenarios

Problem determination

Ingenieurbüro für angewandte Strömungsmechanik

•CFD solution in Environment

Problem determination

Ingenieurbüro für angewandte Strömungsmechanik

Ingenieurbüro für angewandte Strömungsmechanik

•Object based on CAD

Model topology

Points Lines (splines) Surfaces (bicubic)

•Object based on CAD

Model topology

STL-Data file (output)

facett

Data-Set from GIS or related programs

•Points created opto-photografically

•Triangulars transfered into IGES Format

•IGES-Format transfered via CAD-System into STL-format

•STL-File readeble by PHOENICS

•Approximatly 1 day working time

Model topologic

Data-Set from GIS or related programs

•Rounded shape

•Cliffs possible

•Facetts

Model topologic

Data-Set from GIS or related programs

•Curved surface as approximation of mountains, but cliffs and sharp rocks are possible to build.

Model topology

Data-Set used in Rapid-prototyping branch

•Catalytic Reactor Bed

Model topology

Solution

Object form CAD-System

Objects from Library

Pressure distribution on the surface

•Streamlines

•Pressure distribution on surface

Solution

•A simple and easy to use data transfer between GIS and CFD is useful.

•The STL-Format is not established like in the rapid-prototype branch

•All data-sets are sorted in 2 ½ D

•We prefere

•Triangulation by third party product

•Transfer via iges into CAD-system

•Cutting and adding of parts inside of CAD-System

•Transfer of final geometric landscape (buildings can be included) via STL-File into CFD-System

Summary

Discussion