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Mesh generation is one of the most critical aspects of engineering simulation. Too many cells may result in long solver runs, and too few may lead to inaccurate results. ANSYS Meshing technology provides a means to balance these requirements and obtain the right mesh for each simulation in the most automated way possible. ANSYS Meshing technology has been built on the strengths of stand-alone, class-leading meshing tools. The strongest aspects of these separate tools have been brought together in a single environment to produce some of the most powerful meshing available.
The highly automated meshing environment makes it simple to generate the following mesh types:
Consistent user controls make switching methods very straight forward and multiple methods can be used within the same model. Mesh connectivity is maintained automatically.
Different physics requires different meshing approaches. Fluid dynamics simulations require very high-quality meshes in both element shape and smoothness of sizes changes. Structural mechanics simulations need to use the mesh efficiently as run times can be impaired with high element counts. ANSYS Meshing has a physics preference setting ensuring the right mesh for each simulation.
Products Features Include:
The meshing tools in the ANSYS Workbench platform were designed with the following guiding principles:
By integrating best-in-class meshing technology into a simulation-driven workflow, ANSYS Meshing provides a next-generation meshing solution.
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.
Meshing Methods: Tetrahedral
The combination of robust and automated surface, inflation and tet meshing using default physics controls to ensure a high-quality mesh suitable for the defined simulation allows for push-button meshing. Local control for sizing, matching, mapping, virtual topology, pinch and other controls provides additional flexibility, if needed.
Note: For volume meshing, a tetrahedral mesh generally provides a more automatic solution with the ability to add mesh controls to improve the accuracy in critical regions. Conversely, a hexahedral mesh generally provides a more accurate solution but is more difficult to generate.
Meshing Methods: Shell and Beam
For 2-D planar (axisymmetric), shell and beam models, ANSYS Meshing provides efficient tools to quickly generate a high-quality mesh to accurately simplify the physics.
Mesh Methods for shell models:
Meshing Controls: Advanced Size Functions
ANSYS Meshing provides two types of size functions to provide appropriate mesh sizing for different physics. The default size function for structural mechanics applications is designed to accurately capture the geometry while minimizing the number of elements in the model. The advanced size function is the default for fluids applications and is designed to accurately capture the geometry while maintaining a smooth growth rate between the regions of curvature and/or proximity.
Meshing Controls: Flexible Sizing Controls
ANSYS Meshing automatically sets default mesh size controls on the geometry. To obtain more control over certain areas of the model global, body, face, edge or vertex sizing controls can be inserted.
In addition, a sphere of influence and/or a body of influence can be used to further control the mesh sizing.
Meshing Controls: Match Mesh Controls
Periodic models will be automatically meshed with matched mesh at the periodic faces. Match controls can be inserted to define which faces should be matched.
Meshing Controls: Mapped Mesh Controls
ANSYS Meshing technology allows specification of which face(s) onto which a mapped mesh can be forced. Options on how the face should be sub-mapped can be specified if the face is more than four-sided. Faces marked with a mapped mesh control that cannot be mapped will be meshed with a free mesh and the software will notify the user. All faces to be mapped meshed can be conveniently marked to try to force more orthogonal meshing. For solid parts being meshed with a tet mesh, the quads will be split into triangles.
Meshing Controls: Geometry- and Mesh-Based Defeaturing
ANSYS Meshing allows for geometry- and mesh-based defeaturing in a variety of ways. In patch-independent and MultiZone meshing defeaturing is integrated into the meshing process and driven by a tolerance. Virtual topologies are used to merge faces and edges prior to meshing so that the mesher ignores the individual faces and edges. Pinch controls are used to merge mesh nodes in close proximity after meshing using a given tolerance. Each of these approaches has some unique strengths.
|Automated structural meshing with well-shaped quadratic tet elements can be used for complicated geometries, such as this engine head.||Mesh using standard size function.|
|Hex mesh of brake assembly using combination of hex meshing methods
including sweep, thin sweep, MultiZone and hex-dominant.
|Assemblies require modeling contact between parts as well
as specific interfaces, such as gaskets.
|ANSYS 16.0 Capabilities Chart | Download|