Fluid Flow Meshing Methods

In Discovery, the meshing method you choose depends on the complexity of your model, the solution accuracy you would like to achieve, and the computational expense. Two meshing methods are available, tetrahedral meshing and polyhedral meshing. Tetrahedral meshes are composed of only tetrahedron-shaped elements, while polyhedral meshes can be composed of multiple shapes, including triangles, quadrilaterals, and polygons. Polyhedral meshes are more adaptable than tetrahedral meshes, as they can conform to the shape of the object they are modeling more closely. This in turn means polyhedral meshes have a lower cell count than the equivalent original tetrahedral mesh, and therefore solution convergence will generally be faster, possibly saving some computational expense.

From the Simulation Options dropdown menu in the Simulation tab ribbon, click Additional Fluid Flow Options (Refine) to see the options in the expanded panel. Click Specify meshing method to choose Tetrahedra mesh or Polyhedra mesh.