Introduction to ANSYS Fluent Meshing

• Fluent Meshing is a robust and powerful mesh generation software for unstructured meshing
• Fluent Meshing contains several tools:
– To handle, repair and improve boundary meshes
– Surface Wrapping capabilities that can be used to generate CFD meshes
on highly complex and “dirty” geometry
– Class leading prism mesh generation capabilities allowing the capture of
boundary layers on complex geometry
– High quality tetrahedral and hexcore meshing algorithms
– Cutcell mesh which create both quad-dominant surface and hex-dominant
volume mesh at the same time
– Scripted meshing for repeatability and capture of best practices

Fluent Meshing overview and characteristics
• Boundary mesh modification/improvement
• Boundary mesh generation methods
• Volume mesh generation methods
• Flexibility

Graphical User Interface

• How to launch Fluent Meshing
• Fluent Meshing Interface
• Terminology
• Manipulating the graphics
• Mouse Handling

Importing CAD with CFD Surface Mesh

• Meshing of geometries where fluid extraction has taken place in CAD –
i.e. we are dealing with “closed regions”
• CAD reader technology is used to import and surface mesh on-the-fly OR
• Surface mesh is imported from another package
• Mesh is improved
• Surface mesh is then filled with volumetric elements before moving to

Surface Remesh/Join/Intersect

• The value and usage of Surface
• Differences between Surface Remeshing and CFD Surface Mesh
CAD Import
• Typical usage scenarios and remeshing strategies
• How to ensure feature capturing during Surface Remeshing
• How to use Surface Remeshing to improve local mesh quality

Fixing Surface Meshes

• Requirements for a high quality, water-tight boundary mesh
• Quantitative and Qualitative checks for surface mesh quality
• Boundary modification tools that allow to
– Diagnose and locate problems with the boundary mesh
– Fix problems with the boundary mesh
– Perform local mesh manipulation to manually fix issues

Working with Unclosed CAD

• Meshing of geometries where fluid extraction has not taken place in
CAD – i.e. we need to extract “closed regions”
• CAD reader technology is used to import and create STL-like faceting OR
• Wrapper techniques – how they work and how they can be used to extract
wetted regions and surface mesh
• How to find and fix problems before wrapping
– Recognize the advantages and limitations of wrapping
– Tools to close large openings/gaps
– Tools to find and fix small gaps and acute angles
– Tools to find small holes
• Connecting regions at faceted level
• Mesh is improved/remeshed
• Surface mesh is then filled with volumetric elements before moving to solver

Volume Fill Methods

• Volume mesh methods
• Volumetric Regions
• Mesh generation process with Auto Mesh
• Cavity remeshing for local component changes
• Quality improvement
• Parallel meshing

CutCell Meshing

• The benefits and limitations of CutCell Meshing
• How CutCell generates meshes
• How to generate Prisms (Inflation) with CutCell meshing

Scripting in Fluent Meshing

• Create journals with TUI commands
• Scheme tips
• Query functions

Automated Meshing using a Script


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