MultiZone Quad/Tri Method creates a mesh of quads,triangles or both over the entire part of the selected body.
MultiZone Quad/Tri is a patch independent method.
To access the MultiZone Quad/Tri Method,
On the Tree Outline, right-click Mesh and click Insert > Method.
Or
On the Tree Outline, click Mesh and click Method in the Mesh Context tab on the Ribbon.
Select Method as MultiZone Quad/Tri in the Quadrilateral Dominant Details view.
Scope
Scoping Method: Allows you to scope geometry bodies or named selection. The default value is Geometry Selection.
Geometry Selection: Allow you to scope the geometry bodies. When you select Geometry Selection, the Geometry allows you to select the geometry from the Geometry window.
Named Selection: Allow you to scope bodies grouped under a named selection.
Definition
Suppressed: Allows you to suppress the selected control. The default value is No. When Suppressed is set to Yes, Active displays the status of the selected control. Active is read-only.
Method: Allows you to select method.
Surface Mesh Method - Instructs MultiZone Quad/Tri to use the Program Controlled, Uniform, or Pave method to create the mesh. The default method is Program Controlled
Program Controlled: Automatically uses a combination of Uniform and Pave mesh methods depending on the mesh sizes set and face properties.
Uniform: Uses a recursive loop-splitting method which creates a highly uniform mesh. This option is generally good when all edges have the same sizing and the faces being meshed do not have a high degree of curvature. The orthogonality of the mesh from this method is generally very good.
Pave: Uses a paving mesh method which creates a good quality mesh on faces with high curvature, and also when neighboring edges have a high aspect ratio. This approach is also more reliable to give an all-quad mesh.
Note: The MultiZone Quad/Tri method ignores the Sizing Options when Surface Mesh Method is set to . In such cases, Element Size acts as a hard size.
Element Order - Allows you to select the element order. Refer to Method Controls and Element Order Settings.
Free Face Mesh Type - Determines the shape of the mesh elements. The default value is Quad/Tri. Free Face Mesh Type has the following options:
All Tri: Allows you to create the triangular mesh.
Quad/Tri: Allows you to create the mesh with both quadrilateral and triangular elements.
All Quad: Allows you to create the quadrilateral mesh.
Element Size - Allows you to specify the element size used for the selected geometry. Applicable only when Surface Mesh Method is set to . Otherwise, uses the global Element Size.
Advanced
Preserve Boundaries: Allows you to protect the boundaries from the defeature size when set to Protected and when set to All it respects all the features. The default value is Protected.
Mesh Based Defeaturing - "Filters" edges in or out based on size and angle. The default value based on global Mesh Defeaturing. This local Mesh Based Defeaturing setting is the same as the setting of the global Mesh Defeaturing control. When Mesh Based Defeaturing is On, a Defeature Size field appears.
Defeature Size: Allows you to set the defeature size for mesh defeaturing. Defeature Size is available only when Mesh Defeaturing is set to Yes. The default value is based on the global Mesh Defeaturing. When you specify a value different from the global Defeature Size, it overrides the global value. Specifying a value of 0.0 resets the Defeature Size to its default. A recommended setting is at least one-half the value set for Element Size to assure a successful mesh. You can parametrize Defeature Size.
Note: When the global Mesh Defeaturing control is on but Use Adaptive Sizing is set to Yes, the default defeaturing performed for MultiZone Quad/Tri includes defeaturing based on the dihedral angle between the faces as well as edge length defeaturing based on the smallest element size set by the user.
Sheet Loop Removal: Removes holes on surface bodies based on size. If set to Yes, a Loop Removal Tolerance field appears. The default value is No.
Loop Removal Tolerance: Sets the tolerance for loop removal. You can specify a numerical value greater than 0.0. By default, the value of this local Loop Removal Tolerance field is the same as the global Loop Removal Tolerance. When you specify a value different from the global Loop Removal Tolerance. It overrides the global value. Holes with boundary conditions applied are not removed from the mesh. Any boundary conditions applied to holes that were removed from the mesh will not be respected by the solver.
Minimum Edge Length - Read-only indication of the smallest edge length in the part.
Write ICEM CFD Files - Sets options for writing Ansys ICEM CFD files. Refer to Writing Ansys ICEM CFD Files for details.
Usage Information for the MultiZone Quad/Tri Mesh Method Control
The following usage information is applicable to the MultiZone Quad/Tri mesh method:
MultiZone Quad/Tri does not support base mesh caching, so a change to inflation controls requires remeshing.
Using MultiZone Quad/Tri may allow meshing over very small bodies in a multibody part. This may lead to a solver error if a body load is associated with that body. If this is the case, you must suppress the body before solving your model.
Surface bodies with specified variable thickness are not protected topology. To prevent faces and their boundaries from being meshed over, create an individual Named Selection for each thickness.
The MultiZone Quad/Tri mesh method supports mesh connections.
You can use the MultiZone Quad/Tri mesh method in combination with other surface mesh methods in a multibody part, and meshes the bodies with conformal mesh. If you select the MultiZone Quad/Tri mesh method to mesh a multibody part that contains a mix of line bodies and surface bodies, all surface bodies and all line bodies that share edges with surface bodies will be meshed with the selected method. Any remaining line bodies (where only vertices are shared with surface bodies) will be meshed with the Quadrilateral Dominant mesh method. Refer to Conformal and Non-Conformal Meshing for more information about conformal meshing.
When meshing multibody parts having solid bodies and sheet bodies with some faces shared, it is best to mesh the shared faces with MultiZone Quad/Tri. If the faces are meshed using the solid body mesh method control, the MultiZone Quad/Tri body will often fail.
Caution: Multiple environments with different loadings may over-constrain the MultiZone Quad/Tri mesher such that the mesher may not be able to return a mesh for the given inputs. If discretization error is not an issue, the mesher will be less constrained if you duplicate the model and change the environment instead of adding multiple environments under the same model.