Meshing Methods: Hexahedral

ANSYS Meshing technology provides multiple methods to generate a pure hex or hex-dominant mesh. Depending on the model complexity, desired mesh quality and type, and the time available to perform meshing, ANSYS Meshing provides a scalable solution. Quick automatic hex or hex-dominant mesh can be generated, or a highly controlled hex mesh for optimal solution efficiency and accuracy.

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Hex mesh of brake assembly using combination of hex meshing methods including sweep, thin sweep, MultiZone and hex-dominant

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Automated hex meshing using MultiZone mesh method that automatically decomposes geometry to create all-hex or hex-dominant mesh

Mesh Methods

  • Cut cell Cartesian meshing
    • This mesh method generates a high percentage of hexahedral cells in a Cartesian layout in the far field, to deliver accurate fluid flow results.
    • Local to the surface, mixed element types are used that allow the mesh to conform to sharp features.
    • The surface cells can be inflated to generate hexahedral and prismatic layers to capture near-wall physics effects.
    • Rapid mesh generation of hexahedral cells with minimal user setup make this mesh method ideal for complex geometry for computational fluid dynamics (CFD) simulation.
  • Automated sweep meshing
    • Sweepable bodies are automatically detected and meshed with hex mesh when possible..
    • Edge increment assignment and side matching/mapping are done automatically.
    • Sweep paths are found automatically for all regions/bodies in a multibody part.
    • Defined inflation is swept through connected swept bodies.
    • Sizing controls and mapped controls can be added, and source faces selected to modify and take control of the automated sweeping.
    • Adding/modifying geometry slices/decomposition to the model greatly aids in the automation to obtain a pure hex mesh.
  • Thin solid sweep meshing
    • This mesh method quickly generates a hex mesh for thin solid parts that have multiple faces as source and target.
    • This method can be used in conjunction with other mesh methods.
    • Sizing controls and mapped controls can be added, and source faces selected to modify and take control of the automated sweeping.
  • MultiZone sweep meshing
    • This advanced sweeping approach uses automated topology decomposition behind the scenes to attempt to automatically create a pure hex or mostly hex mesh on complicated geometries.
    • Decomposed topology is meshed with a mapped mesh or a swept mesh if possible. The option to allow for free mesh in sub-topologies that can’t be mapped or swept is available.
    • This method supports multiple source/target selection.
    • Defined inflation is swept through connected swept bodies.
    • Sizing controls and mapped controls can be added, and source faces selected to modify and take control of the automated sweeping.
  • Hex-dominant meshing
    • This mesh method uses an unstructured meshing approach to generate a quad-dominant surface mesh and then fill it with a hex-dominant mesh.
    • This approach generally gives nice hex elements on the boundary of a chunky part with a hybrid hex, prism, pyramid, tet-mesh used internally.