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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.
Run Adaptive Enclosure
Use the Enclosure: Adaptive tool to create traditional tight or loose enclosure from selected parts.

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What's New
View new features for HyperMesh CFD 2024.1.
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Learn the basics and discover the workspace.
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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.
- 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
    Use the Remesh to create new surface mesh on converted geometry.
  - Smooth Mesh
    Use the Smooth tool to optimize the mesh quality of parts or surfaces.
  - Refine Mesh
    Use the Refine tool to split elements and optimize the mesh quality of parts and surfaces.
  - 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
  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.

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Run Adaptive Enclosure

Use the Enclosure: Adaptive tool to create traditional tight or loose enclosure from selected parts.

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

If local and proximity controls are defined, they will override the default settings defined in this tool.

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

Figure 1.
Select parts to enclose.
In the dialog, select a enclosure method.
- Tight Enclosure - Creates a enclosed surface mesh which adheres as closely as possible to the original topology representation, automatically detecting and following the surface features of the model.
  The accuracy of the output is dictated by the element size. The larger the element size the less detail, the smaller the element size the more detail. This algorithm works differently than the loose enclosure in that it projects the nodes of the enclosure to the original mesh, hence it is able to more accurately capture features.
- Loose Enclosure - Encloses the selected parts with the target element size specified, and outputs an outer-volume mesh which approximately adheres to the original topology.
  A smaller element size generates a enclosure mesh that more closely approximates the original representation and adheres to more features; a larger element size produces a more basic mesh which ignores more features. The loose enclosure does not project the nodes of the enclosure mesh to the original mesh, and typically the enclosure mesh will have an offset from the original mesh. Again, the offset is dependent on the target element size used.
Choose a volume definition.
- All - Enclose all volumes.
- Consider enclosed seeds - Enclose volume enclosed by defined seed nodes.
- Volume Index - Useful to get largest or second largest volume.
- Exclude enclosed seeds - Enclose all volumes but not volumes with enclosed seed nodes.
Define remaining enclosure parameters.
Click Run.
After tight enclosure, the generated result is placed in the first selected part and the part is renamed as “CFD enclosure 1”. Since the enclosed form is manifold, results can be one or multiple solids. The input selection is removed in order to avoid duplication.