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Geometry Modeling
Manage CAD, FE, and 2D parametric sketch geometry.
Discrete Geometry
Work with discrete geometry like FE Geometry and floating elements.
Enclosure
In CFD modeling, input parts can have topology issues, like free surfaces and self-intersections, and part assembly issues, such as parts with very close proximity and intersecting parts. Manually connecting these parts can be time consuming and require expertise in certain tools. The Enclosure tool can generate a watertight manifold model from dirty input with considerably less manual work.
Define Proximity Refinement Controls
Use the Enclosure: Proximity tool to define proximity controls for the enclosure process.

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View new features for HyperMesh CFD 2024.1.
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Geometry Modeling
Manage CAD, FE, and 2D parametric sketch geometry.
- Sketching
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- Geometry
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- Discrete Geometry
  Work with discrete geometry like FE Geometry and floating elements.
  - Cap Holes and Fill Gaps
    Use the Cap tools to close openings and gaps between parts/surfaces.
  - Connect Geometry
    Use the Connect tools to trim, fuse, and stitch your discrete geometry.
  - Enclosure
    In CFD modeling, input parts can have topology issues, like free surfaces and self-intersections, and part assembly issues, such as parts with very close proximity and intersecting parts. Manually connecting these parts can be time consuming and require expertise in certain tools. The Enclosure tool can generate a watertight manifold model from dirty input with considerably less manual work.
    - Define Local Enclosure Controls
      Use the Enclosure: Local tool to define local enclosure size settings on selected surfaces.
    - Detect Leaks
      Use the Enclosure: Leak Check tool to detect leaks in your model before enclosing.
    - Define Proximity Refinement Controls
      Use the Enclosure: Proximity tool to define proximity controls for the enclosure process.
    - Run Auto
      Use the Enclosure: Auto tool to create enclosure from selected parts. Auto keeps the original geometry shape as it is and just fixes areas of issue.
    - Run Adaptive Enclosure
      Use the Enclosure: Adaptive tool to create traditional tight or loose enclosure from selected parts.
  - Remesh Tessellated Models
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  - Decimate Mesh
    Use the Decimate tool to coarsen mesh based on a defined element size.
  - Create Derived Regions
    Use the Derived Region tool to create enclosed and offset regions around a selection – which can be used to define volumetric refinement levels – or create projected regions in a given direction.
  - Convert Elements and Update FE Geometry
    Convert elements that aren't associated with geometry into FE geometry, or update existing FE geometry.
  - Organize Entities
    Use the Organize tool to move or copy entities into their proper destinations.
  - Repair Surface Mesh
    Use the Repair tool to find, review, and fix issues in the mesh.
  - Automatically Fix Mesh Quality
    The Auto Fix tool is useful for cleaning up non-manifold edges, free edges, intersections, high aspect ratio elements, and proximity distance.
  - Edit 2D Surface Mesh Elements
    Use the Edit tools to manually improve the quality of surface mesh elements and nodes.
  - Fix Normals
    Use the Normals tool to fix element normals using different methods.
- Model Build and Assembly
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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.

Define Proximity Refinement Controls

Use the Enclosure: Proximity tool to define proximity controls for the enclosure process.

The Enclosure tools work for tessellated geometry. If the input is b-spline geometry, first convert to discrete geometry using the Convert tool.

In order to capture gaps locally without refining size everywhere, you can select surfaces where gaps should be preserved.

From the Discrete ribbon, click the Enclosure > Proximity tool.

Figure 1.
Select surfaces.
In the dialog, define a proximity tolerance.
All proximity above this value is removed. Thus, the proximity tolerance should be smaller than the gap you want to preserve.
From the guide bar, execute the command in the following ways:
- Click to confirm your selection and remain in the tool.
  This allows you to continue creating instances and helps you visualize and edit instances with the legend.
- Click to confirm your selection and exit the tool.