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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, [email protected]
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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
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Ingenieurbüro für angewandte Strömungsmechanik
•CFD solution in Environment
•Exhaust emission
•Condensation
•Fresh-air supply for turbines and generators
•Catastrophe scenarios
Problem determination
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Ingenieurbüro für angewandte Strömungsmechanik
•CFD solution in Environment
•Power supply station
•Residential district
•Fresh-air supply for turbines and generators
•Catastrophe scenarios
Problem determination
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Ingenieurbüro für angewandte Strömungsmechanik
•CFD solution in Environment
Problem determination
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Ingenieurbüro für angewandte Strömungsmechanik
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Ingenieurbüro für angewandte Strömungsmechanik
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•Object based on CAD
Model topology
Points Lines (splines) Surfaces (bicubic)
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•Object based on CAD
Model topology
STL-Data file (output)
facett
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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
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Data-Set from GIS or related programs
•Rounded shape
•Cliffs possible
•Facetts
Model topologic
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Data-Set from GIS or related programs
•Curved surface as approximation of mountains, but cliffs and sharp rocks are possible to build.
Model topology
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Data-Set used in Rapid-prototyping branch
•Catalytic Reactor Bed
Model topology
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Solution
Object form CAD-System
Objects from Library
Pressure distribution on the surface
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•Streamlines
•Pressure distribution on surface
Solution
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•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
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Discussion