Mosaic Meshing Technology

Accuracy and solution time are critical concerns in computational fluid dynamics (CFD) simulations, and both are highly dependent on the characteristics of the mesh. Different types of meshing elements are needed to resolve various geometries and flow regimes. Transitioning between different types of elements, however, has been a challenge. The transition zone has typically relied on nonconformal interfaces or on tetrahedra, but these create issues regarding mesh quality and excessive cell count. As a result, engineers have had to compromise on a common element type to minimize mesh transitions.

ANSYS Mosaic technology greatly improves upon this by automatically connecting different types of meshes with general polyhedral elements. Mosaic mesh-connecting technology has the potential to deliver exciting new combinations of meshing elements for solving increasingly complex parts with greater accuracy and speed.

The new Poly-Hexcore feature in ANSYS Fluent uses this technology to fill the bulk region with octree hexes, maintain a high-quality, layered polyprism mesh in the boundary layer and conformally connect the two meshes with general polyhedral elements.

Mosaic Connects Any Mesh with Polyhedral Elements - White Paper

Generate Mosaic-enabled Poly-Hexcore meshes up to 10x faster using parallel processing. The patent-pending Mosaic algorithm creates adaptive conformal mesh interfaces for the best combination of speed and accuracy. No need to buy a separate HPC license.

The following example shows a comparison between Poly-Hexcore with Mosaic technology and conventional all-polyhedral meshing technology with a bluff body flame holder. The Mosaic mesh had fewer, better quality cells, requiring one-third less memory, and delivered a solution two-times faster with higher accuracy.

mosaic meshing technology

high quality Hexahedral = blue
isotropic poly prism = orange
Mosaic polyhedral = lime green

Mosaic meshing technology conformally connects high-quality Hexcore elements in the bulk region and isotropic poly-prism elements in the boundary layer with Mosaic polyhedral elements.

All polyhedral mesh (left) and Poly-Hexcore mesh (right)

All polyhedral mesh (left) and Mosaic Poly-Hexcore mesh (right)