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S O F T W A R E I N N O V A T I O N S
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With GEMS, You Can Discover
in Geometry Modeling and Mesh Generation
- A state-of-the-art software based on OOP and C++
- Integrated geometry modeling and mesh generation tools
- Multiblock structured grid generation options for surface and volume grids
- Automatic grid generation
- Intelligent topology definition by Case-Based Reasoning/Learning
- Storage and recovery of the mesh generation process at any stage
- Context sensitive help
 Definition of surface geometry by cross sectional cubic spline curves.
- Built in CAD options to create and edit grid boundary curves and surfaces
- Supported curves : Arc, Line, Polyline, B-Spline, Cubic Spline, NURBS
- Surface creation by mapping or interpolation
- Surface intersection curves and surfaces of revolution
- Reading external CAD data (sectional or wire frame) in IGES format
- Specific curve and surface generation and editing options
Definition of surface geometry by a number of patches (wireframe).
- Algebraic and elliptic (multigrid or SLOR) grid generation options
- Translating, rotating or sweeping a face to create volume grids
- Interactive control of boundary grid point distribution and orthogonality
- Definition of various boundary conditions by surface patches
- Interactive definition of topology, connectivity and boundary conditions
- Surface and volume grid cell quality checks
- Displaying and saving coarse levels for multigrid
- Rendering, hidden line removal and color map representation
- Overlapping grid cell display
Surface grids on the FLYER prototype (courtesy of ERG Corp., Ankara)
- Macro (script) files to record modeling and generation steps interactively
- Replaying macro files partially or completely to perform repeated tasks
A six-block H-type grid for the coolant passages of a turbine blade.
- Learning past experiences by Case Based Reasoning / Learning (CBR / CBL)
- User preferences and user evaluation in storing and recovering grid topology
- Case retrieval
- by electing a previous topology or
- by case suggestion utilizing the fitness metric
- Constraint satisfaction based on
- desired number of grid points,
- grid cell quality,
- multigrid levels and
- flow solution method
Selected block surfaces in an industrial combustion chamber geometry.
- Originally developed by Dr. Cem Dener in June 1993
- Supported by the Technology Development Fund of Turkey (TTGV)
- TTGV-069 project to extend the capabilities of GEMS (Oct `93 - Dec `94)
- Automatic Grid Generation (AGG) developed by Ms. Esin Koc
- Intelligent Topology Definition (ITD) developed by Mr. Izzet Sirin
Surface scrolling and surface rendering on space shuttle configuration.
- GEMS 3.3 : Silicon Graphics with IRIX
- Requirements :
- Min. 32 MB RAM
- Min. 50 MB free space on hard disk
- 1280x1024 pixel resolution display
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Definition of surface geometry by cross sectional cubic spline curves.
Definition of surface geometry by a number of patches (wireframe).
Surface grids on the FLYER prototype (courtesy of ERG Corp., Ankara)
A six-block H-type grid for the coolant passages of a turbine blade.
Selected block surfaces in an industrial combustion chamber geometry.
Surface scrolling and surface rendering on space shuttle configuration.