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Geometry Repair
Manage CAD, FE, and 2D parametric sketch geometry.
Geometry
Create, edit, and cleanup geometry.
Edit Geometry
Explore the tools used to edit geometry.
Split Surfaces and Solids
Use the Split tools to create fixed points and split surfaces or solids using a variety of methods.
Split by Curvature
Split surfaces based on curvature or angle.

Welcome
What's New
View new features for HyperMesh CFD 2025.1.
Get Started
Learn the basics and discover the workspace.
Onboarding Resources
Discover HyperMesh CFD functionality with interactive tutorials and community resources.
Solution Layers
Solution-centric workflows allow you to traverse through modeling environments using a dedicated UI layer.
Manage Files and Data
Create, open, import, and save models.
Convert
Use the Convert tool to convert entire models between data types.
Geometry Repair
Manage CAD, FE, and 2D parametric sketch geometry.
- Sketching
  Create and edit 2D parametric sketch geometry.
- Geometry
  Create, edit, and cleanup geometry.
  - Repair Geometry
    Review geometric errors in the model's surfaces and solids and fix any defects.
  - Create Geometry
    Explore the tools used to create geometry.
  - Edit Geometry
    Explore the tools used to edit geometry.
    - Split Surfaces and Solids
      Use the Split tools to create fixed points and split surfaces or solids using a variety of methods.
      - Split Interactive
        Use the Split: Interactive tool to quickly create fixed points on surfaces and edges, and split surfaces with lines. You can also remove fixed points from surfaces or surface edges to unsplit them.
      - Split with Nodes
        Use the Split: Nodes tool to split surfaces using ordered (node list/path) and non-ordered node selections.
      - Split with Lines
        Use the Split: Lines tool to split surfaces and solids using lines, bounding lines, offset lines, and graphical lines.
      - Split with Surfaces
        Use the Split: Surfaces tool to split surfaces and solids using surfaces.
      - Split with Planes
        Use the Split: Planes tool to split lines, surfaces, or solids.
      - Perform Parametric Trimming
        Use the Split: Parametric tool to restore suppressed fixed points.
      - Split by Curvature
        Split surfaces based on curvature or angle.
    - Quick Edit
      Use the Quick Edit tool to split surfaces and washers, change the category (shared, free, and so on) of edges, create or delete surfaces and points, project points, and trim fillets.
    - Stitch Surfaces and Suppress Edges
      Use the Stitch tool to stitch and unstitch adjacent or overlapping surfaces, and suppress or unsuppress edges.
    - Imprint Geometry
      Use the Imprint tool to imprint geometry onto target surfaces or lines, thus creating new fixed points or edges.
    - Offset Geometry
      Use the Offset tool to offset surfaces, solids, lines, elements, or faces.
    - Drag and Spin
      Use the Drag/Spin tool to push or pull surfaces and spin lines and surfaces in order to creates surfaces or solids.
    - Combine, Subtract, Intersect Solids
      Use the Boolean tool to combine solids, subtract one solid from another, and find the intersection out of the solids.
    - Disconnect Solids
      Separate solids that are connected at a shared interface.
    - Find and Fill Cavities
      Use the Plug tool to find and fill cavities. The Plug tool can also be used to remove protrusions, holes, and complex features.
    - Scale Parts
      Use the Scale tool to resize geometry in your model.
    - Mirror Entities
      Use the Mirror tool to mirror/reflect selected entities across a symmetry plane.
    - Merge Solids or Surfaces
      Merge two or more solids or surfaces. Solids are merged by removing shared faces while surfaces are merged by suppressing shared edges.
  - Geometry Cleanup
    Clean up problematic areas on geometry.
  - Simplify Region
    Use the Simplify Region tool to create simple shapes around selected geometry.
- Discrete Geometry
  Work with discrete geometry like FE Geometry and floating elements.
- Model Build and Assembly
  Create, organize and manage parts and subsystems.
Meshing
Generate surface/volume mesh by defining mesh controls, or interactively create and edit 2D surface mesh.
Setup
Prepare your model and run the simulation.
Post-Processing
Post-process the simulation results by creating visualizations and measurements.
Design Exploration
Once the baseline model is prepared, you can define morph volumes, morph geometry, create design shapes and run DOE studies. These tool work for both AcuSolve and ultraFluidX-based workflows.
Automation
Automate simulation processes with templates and utility scripts.
Solver Help
More resources for AcuSolve and ultraFluidX solvers.

Split by Curvature

Split surfaces based on curvature or angle.

Navigate to the Geometry ribbon.
While in idle mode, select surfaces.
Right-click and select Edit > Split by Curvature/Angle.
In the dialog, enter a minimum curvature radius value.
Click OK.
Selected surfaces are split at the locations where the curvature or angle is higher than the defined value.