Home
Geometry Modeling
Manage CAD, FE, and 2D parametric sketch geometry.
Geometry
Create, edit, and cleanup geometry.
Edit Geometry
Explore the tools used to edit geometry.
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.

Welcome
What's New
View new features for HyperMesh CFD 2024.1.
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 Modeling
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.
    - 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.
Automation
Automate simulation processes with templates and utility scripts.
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.
Solver Help
More resources for AcuSolve and ultraFluidX solvers.

View All Altair HyperWorks Help

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.

From the Geometry ribbon, click the arrow next to the Edit tool set, then select Merge.

Figure 1.
Choose Solids or Surfaces using the guide bar selector.
Select the solids/surfaces to merge.
Optional: On the guide bar, click to define merge options.
On the guide bar, click Merge.

Merge Solids or Surfaces Using the Context Menu

Quickly merge solids or surfaces without opening the Merge tool.

Navigate to the Geometry ribbon.
While in idle mode, select the surfaces or solids to merge.
Right-click in the modeling window and select Edit > Merge Connected or Merge Surfaces from the context menu.
Merging surfaces using this method is dependent on a defined feature angle. Surfaces which have a greater angle than the user-defined value are merged. To set the default feature angle, go to File > Preferences > Geometry and edit the Geometry feature angle option.