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 Wrap tool can generate a watertight manifold model from dirty input with considerably less manual work.
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.
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.
Use the Remesh to create new surface mesh on converted geometry.
The Remesh tool works for tessellated geometry. If the input is b-spline geometry,
first convert to discrete geometry using the Convert
tool.
Imported Nastran.stl files can consist of poor-quality mesh. After converting
to discrete geometry, it's helpful to remesh the model. The rest of the options used
to edit geometry work better on a good quality mesh.
Note: You have the option to
retain the surface mesh you create here when performing batch
meshing.
From the Discrete ribbon, click the Remesh tool.
Select surfaces, parts, or elements to remesh.
Define meshing options in the dialog.
Mesh size
Maximum allowable element size.
Curvature based refinement
Refine mesh at curvatures and features by lowering mesh size till
minimum size. If off, creates constant size mesh defined by
Mesh size.
Minimum size factor
Minimum allowable element size factor. Calculates minimum size by
multiplying mesh size with factor defined here.
When there are
model and local mesh controls for surface deviation, and the
minimum size of neighboring mesh controls are different, the
minimum size automatically propagates from the smaller mesh size
to neighboring surfaces.
Geometric feature angle
Determines which features to preserve/refine. The mesher identifies
features internally and preserves/refines them based on the defined
feature angle.
Also controls the element size at curve input. The
smaller the angle, the more refined curvature will be and the
more preserved the input shape will be.
Mesh growth rate
Determines how rapidly elements can increase in size as they are
created further and further away from features.