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TGrid
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Product Features Mesh Import Formats 4 ANSYS® Mechanical 4 NASTRAN ® 4 PATRAN ® 4 I-DEAS® 4 HyperMesh® 4 CGNS 4 ANSYS® FLUENT® 4 GAMBIT® 4 ANSYS® FIDAP® 4 STL 4 VRML 4 Multiple file import 4 Append file import 4 Support of compressed files TM TGrid™ software is a specialized pre-processor for fluid flow analysis. It is used to create large, unstructured tetrahedral and hexcore meshes for complex geometries. TGrid software is utilized heavily for large-scale automotive and aerospace applications in which advanced meshing techniques are required for the computational analysis of fluid flow. Customers and Applications Automotive industries around the world are pushing productivity on new car models, resulting in the demand for rapid and high-quality solutions for large-scale computational fluid dynamics (CFD) problems. This trend is accompanied by manufacturers’ needs to quickly make changes in automotive CFD meshing without time-consuming manual interactions. TGrid software helps ensure productivity gains at each step, from geometry to volume mesh. Flexibility and customization allow TGrid meshing tools to be used in a wide range of applications, from external aerodynamics on Formula One (F1) racing cars to droplet distribution inside human nasal cavities. Boundary Mesh Improvement 4 Report free and unused nodes 4 Remove duplicate/isolated nodes 4 Automatic quality improvement 4 Automatic removal of small cells 4 Quality-based face swapping 4 Quality-based node smoothing 4 Manual mesh quality improvement Boundary Mesh (Re-)Creation 4 Create face patch 4 Create planar rectangular face 4 Create closed boundary box 4 Create closed boundary cylinder 4 Create cylindrical surface 4 Create edge zones Boundary Mesh Manipulation 4 Boundary refinement tools 4 Connecting zones 4 Boundary stitch operation 4 Quad split operation 4 Moving cluster of nodes 4 Remeshing of existing boundary meshes Boundary Zone Manipulation 4 Manage boundary zones • Summarize • Merge • Copy • Delete In this generic Formula One car, TGrid prism layers and HexCore volume meshing are applied on a high-quality surface mesh. In this human nasal cavity, wrapper has been used to produce a valid high-quality mesh from CAT scan data. Image courtesy Materialise. Wrapper Technology In today’s automotive industry, front-end underhood thermal management (UTM) represents one of the most challenging meshing applications. TGrid software addresses this challenge by capturing best practices and automating the time-consuming manual meshing once required for this class of problems. The entire underhood wrapper-based meshing process has been encapsulated for overnight batch execution. Moreover, customized user interfaces can be developed to expose key parameters and automate specific processes. Key Wrapper Capabilities • A full suite of global and local size definition tools using a mixture of curvature, proximity and fixed- and region-based sizing • Both manual and fully automatic leak/hole detection and fixing algorithms

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Product Features • Rename • Translate • Triangulate • Rotate • Flip normals • Change type • Change position 4 Boundary group manipulations • Create groups • Activate groups • Draw groups • Delete groups 4 Separate boundary face zones by: • Angle • Neighbor • Region • Mark • Shape • Seed using angle • Seed using edge loop 4 Mesh projection using: • Normal direction • Closest point • Specified normal criteria 4 Periodic or cyclic boundary zone • Rotational periodicity • Translational periodicity Surface Wrapping Tools 4 Prescribe mesh size functions • Global curvature and/or proximity •...

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Volumetric Mesh Generation Prism and volume generation capabilities in TGrid software are utilized by a large sector of leading automotive manufacturers as well as a majority of F1 racing teams. The auto-mesh procedure in TGrid software ensures that the user selects a desirable prism layer algorithm, quad-tri transitioning type and volume mesh. Key Prism and Transitioning Capabilities • Prism layer creation using first height, first aspect ratio, and last aspect ratio algorithms using linear and geometric growth • Proximity detection with a combination of local layer compression and prism...

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This application shows a wrapped automotive engine model surrounded by a tet mesh from the new highquality advancing front algorithm. Image courtesy PSA Peugeot Citroën. Product Features Interface, Graphics and Reporting 4 Graphical user interface • Fully interactive • Extensive hardcopy options • Large number of “hot keys” 4 View/scene display 4 Grid display • Selected boundary zones • Unmeshed faces • Free or multi-connected faces • Unused nodes • Faces below quality/size criteria • Color by ID or boundary type 4 Histogram plots 4 Text user interface 4 Query functions for execution in...

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