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Pre-Processing
Simcenter STAR-CCM+ solves physics problems on a computational mesh. To provide this mesh, you first define geometry using internal or external tools, and then create a mesh pipeline whose operations generate the mesh in repeatable steps.
The Surface Repair Tool
The Surface Repair tool diagnoses errors in, and provides repair tools for, tessellated surfaces and part curves. The same tool allows you to reorganize discretized geometry by searching for face-based features and attributes then assigning the results to new or existing part surfaces or curves.
Query Diagnostic Responses From Java Macros
This section provides example Java and reference material for accessing information from surface preparation query diagnostics.
Query Diagnostic Tag Names And Types Reference
This section contains reference material on the available tag names and corresponding type for each query diagnostic.
Face Queries
This section contains reference material on the available tag names and corresponding type for all face-based query diagnostics.

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Pre-Processing
Simcenter STAR-CCM+ solves physics problems on a computational mesh. To provide this mesh, you first define geometry using internal or external tools, and then create a mesh pipeline whose operations generate the mesh in repeatable steps.
- 3D-CAD
  3D-CAD is a feature-based parametric modeler within Simcenter STAR-CCM+ that allows you to build geometries from scratch. The geometries that you create with 3D-CAD are stored as 3D-CAD models, which you can then convert to geometry parts for integration with the meshing and simulation process.
- Modeling Geometry
  This part of the User Guide describes how to use 3D-CAD, the parametric solid modeler available within Simcenter STAR-CCM+. It also describes the features and tools available for further preparation of the geometry model and its surfaces.
- The Surface Repair Tool
  The Surface Repair tool diagnoses errors in, and provides repair tools for, tessellated surfaces and part curves. The same tool allows you to reorganize discretized geometry by searching for face-based features and attributes then assigning the results to new or existing part surfaces or curves.
  - The Surface Repair Workflow
    Use the Surface Repair tool to identify and manually repair surface and part curve errors on the discretized geometry.
  - Surface Repair User Interface
    The functions of the Surface Repair tool are contained within the Surface Repair environment. Repair tool modes are presented in the Surface Repair panel; display, selection, and diagnostics/search functions are embedded within the Graphics window.
  - Selecting Entities
    The surface repair tool allows you to select faces based on either individual triangles from the tessellation or underlying patch definitions in the CAD geometry. A number of methods are available for making rapid selections based on continuity and proximity.
  - Repairing Surfaces
    Diagnose and fix surfaces before running the surface remesher.
  - Repairing Features
    Diagnose and fix part curves before running the surface remesher.
  - Surface Repair Error Categories
    The Surface Repair tool diagnoses the geometry for surface and feature errors and groups the various errors into color-coded categories.
  - Repair Tools Reference
    Use the repair tools to repair errors on the geometry surface and part curves.
  - Global Tools
    Global tools are designed for work on larger portions of the model as opposed to individual faces, edges, and vertices.
  - Query Tools
    Query tools provide information on selected entities in the Graphics window.
  - Classifying Surfaces
    In many cases, different surfaces of a geometry part require different mesh settings, for example, a different number of prism layers for internal and external surfaces. In Surface Repair, you can Classify faces based on specified criteria and create corresponding part surfaces. This classification process is suitable for regular geometries with well defined angles.
  - Organizing Discretized Geometry
    The search capability of the Surface Repair tool is a powerful feature that helps you organise and prepare discretized geometry for simulation.
  - Tagging Surfaces in Surface Repair
    You can tag selected surfaces in the Surface Repair Tool. You can manually select surfaces for tagging, or tag the surfaces returned by the search filters.
  - Part Controls
    The Organize tab allows you to create or reassign part entities using the Part Edit or Create New Part options.
  - Set Controls
    A set is a collection of faces, edges, or vertices, which you can store, recall and browse, using the Set Controls group box.
  - Query Diagnostic Responses From Java Macros
    This section provides example Java and reference material for accessing information from surface preparation query diagnostics.
    - Java Examples
      The following examples show several uses of responses to obtain specific information from query diagnostics.
    - Query Diagnostic Tag Names And Types Reference
      This section contains reference material on the available tag names and corresponding type for each query diagnostic.
      - Vertex Queries
        This section contains reference material on the available tag names and corresponding type for all vertex-based query diagnostics.
      - Edge Queries
        This section contains reference material on the available tag names and corresponding type for all edge-based query diagnostics.
      - Face Queries
        This section contains reference material on the available tag names and corresponding type for all face-based query diagnostics.
      - Mixed Entity Queries
        This section contains reference material on the available tag names and corresponding type for all mixed-entity query diagnostics.
  - Surface Repair Hotkeys
    Hotkeys, also known as keyboard shortcuts, execute surface repair operations using the keyboard instead of the user interface.
  - Pop Up Menu of the Surface Repair Tool Graphics Window
    The following pop-up menu items are available when you right-click a part or part surface in the Graphics window, while using the Surface Repair tool.
- Defining the Regions Layout
  An essential part of the process in setting up your simulation is to define the relationship between geometry parts and regions, boundaries, and interfaces.
- Meshing
  A mesh is a discretized representation of a geometric domain. This domain can include real-world geometry, its content, and its surrounding environment.

Face Queries

This section contains reference material on the available tag names and corresponding type for all face-based query diagnostics.

Note	The same limitations and conditions apply to using face-based queries in macros as with using the GUI. See Face Query Tools for more information.

Face Area


Tag Name	Type	Description
FaceId	Int	Face ID of the selected face
TotalFaceArea	Double	Total area of all selected faces
MinArea	Double	Minimum area of all selected faces
MaxArea	Double	Maximum area of all selected faces
AveArea	Double	Average area of all selected faces
AreaUnits	ClientServerObject<Units>	Preferred area units for the query

Face Centroid


Tag Name	Type	Description
FaceId	Int	Face ID of the selected face
FaceCentroid	Vector<Double>	Face centroid coordinates
LengthUnits	ClientServerObject<Units>	Preferred length units for the query

Face Normal


Tag Name	Type	Description
FaceId	Int	Face ID of the selected face
FaceNormal	Vector<Double>	Face normal vector in preferred units
NormalizedFaceNormal	Vector<Double>	Normalized face normal vector
NormalUnits	ClientServerObject<Units>	Preferred length units specified for query

Face Quality


Tag Name	Type	Description
FaceId	Int	Face ID of the selected face
FaceQuality	Double	Face quality of the selected face
MinQuality	Double	Minimum face quality of all selected faces
MaxQuality	Double	Maximum face quality of all selected faces
AveQuality	Double	Average face quality of all selected faces

Face Geometric Range


Tag Name	Type	Description
LabMinRange	Vector<Double>	Minimum range relative to the laboratory coordinate system
LabMaxRange	Vector<Double>	Maximum range relative to the laboratory coordinate system
XYZComponents	Vector<Double>	X, Y, and Z components of range from minimum to maximum
LengthUnits	ClientServerObject<Units>	Preferred length units for the query

Part Surface List


Tag Name	Type	Description
SelectedPartSurfaces	ClientServerObject<PartSurface>	Part surfaces to which the selected faces belong
SelectedPartSurfacesFaceCount	Vector<Int>	Number of selected faces that belong to a part surface
SelectedContactSurfaces	ClientServerObject<PartSurface>	Contact part surfaces to which the selected faces belong
SelectedContactFaceCount	Vector<Int>	Number of selected faces that belong to a contact part surface

Region Boundary List


Tag Name	Type	Description
SelectedBoundarySurfaces	ClientServerObject<Boundary>	Boundaries to which the selected faces belong
SelectedBoundaryFaceCount	Vector<Int>	Number of selected faces that belong to the boundaries
SelectedInterfaceSurfaces	ClientServerObject<Boundary>	Interfaces to which the selected faces belong
SelectedInterfaceFaceCount	Vector<Int>	Number of selected faces that belong to an interface

Selection Volume


Tag Name	Type	Description
FaceVolume	Double	Volume of the face selection set
VolumeUnits	ClientServerObject<Units>	The preferred units used for the volume result
ClosedAndManifold	Boolean	True if the selection set is closed and manifold, else false