## Chapter 6: CFX-Pre Insert Menu

The Insert menu enables you to create new objects, such as domains or boundary conditions, or to edit existing objects.

Tip: You are also able to create objects from shortcut menus in some contexts.

The settings specified in the various Insert menu panels correspond to all the data displayed in the tree view. In many cases, the name of the new object can be specified. This name must be no more than 80 characters in length.

Valid Syntax for Named Objects Any of the following characters are allowed in names of objects in CFX-Pre: `A-Z a-z 0-9 <space>` (however, the first character must be `A-Z` or `a-z`). Multiple spaces are treated as a single space character, and spaces at the end of a name are ignored.

In general, object names must be unique within the physics setup.

Analysis

  Creates a new Flow Analysis in the Outline tree under Simulation. This enables you to define a steady-state analysis or a transient analysis.

Analysis Type

  Specifies a steady-state or a transient analysis (in the analysis you select, when multiple analyses are available). Steady-state analyses are used to model flows that do not change over time, while transient analyses model flows that are time-dependent. For details, see Analysis Type.

Domain

  Creates new fluid and solid domains (in the analysis you select, when multiple analyses are available). These are the bounding volumes within which your CFD analysis is performed. You can create many domains in CFX-Pre and each can be stationary or rotate at its own rate, using different mesh element types. For details, see Domains.

Boundary

  Sets the conditions on the external boundaries of a specified domain in a selected analysis. In CFX-Pre, boundary conditions are applied to existing 2D mesh regions. For details, see Boundary Conditions.

Subdomain

  Creates subdomains, which are volumes within a specified domain in a selected analysis that are used to create volumetric sources. For details, see Subdomains.

Source Point

  Creates sources of quantities at a point location within a specified domain in a selected analysis. For details, see Source Points.

Domain Interface

  Connects fluid domains together (in the analysis you select, when multiple analyses are available). If a frame change occurs across the interface, you have the choice of using a frozen rotor, stage, or transient rotor-stator model to account for the frame change. You can also take advantage of domain interfaces to produce periodic connections between dissimilar meshes. For details, see Domain Interfaces.

Global Initialization

  Sets values or expressions for the global initial conditions (across all domains in the analysis you select, when multiple analyses are available). Domain specific initialization is set through the domain forms. In CFX-Pre, you can set linearly varying conditions from inlet to outlet using the initialization forms. For details, see Initialization.

Coordinate Frame

  Creates and edits coordinate frames. A Cartesian coordinate frame exists by default, but other Cartesian frames can be made. For details, see Coordinate Frames in the CFX-Solver Modeling Guide and Coordinate Frames.

User Surface

  Defines a User Surface locator. A User Surface is a set of points and 2D face definitions which can be used for Post Processing. For example, solution data can be written using the User Surface instead of every vertex of the mesh, which reduces the amount of data present in results files. For details, see User Locations.

Transformation

  Creates transformations that can be used for positioning data from a results file as part of initialization. For details, see Interpolation Mapping in the CFX-Solver Modeling Guide.

Material / Reaction

  Creates and modifies materials and reactions. For details, see Materials and Reactions.

Regions: Composite Region / Primitive Region

  Composite regions can be created from basic primitive regions that are imported with a mesh. The Regions details view supports union and alias operations. This enables you to manipulate existing 2D and 3D regions without returning to the mesh generation software package. The creation of new regions is limited by the topology of the existing primitive regions; therefore, you must still create appropriate regions in the mesh-generation software package.

  You can specify physics on either a primitive region, a composite region, or a mixture of both.

  For details, see Regions.

Additional Variable

  Under Expressions, Functions and Variables, Additional Variable creates and modifies additional solution variables. For details, see Additional Variables.

Expression

  Under Expressions, Functions and Variables, Expression creates and generates expressions using the CFX Expression Language (CEL). For details, see Expressions.

User Functions

  Under Expressions, Functions and Variables, User Function creates 1D and cloud of points interpolation functions. The interpolation functions are typically used to set boundary and initialization values in addition to profile data interpolation functions. For details, see User Functions.

User Routines

  Under Expressions, Functions and Variables, User Routine creates User CEL, Junction Box, and Particle User Routines. For details, see User Routines.

Solver: Solution Units

  Sets the solution units used by the CFX-Solver (in the analysis you select, when multiple analyses are available). These are the units that your results will appear in. For details, see Units and Dimensions.

Solver: Solver Control

  Controls the execution of the CFX-Solver (in the analysis you select, when multiple analyses are available). This includes timestep and convergence details, as well as the choice of advection scheme. For details, see Solver Control.

Solver: Output Control

  Controls output from the CFX-Solver, including backup and transient results file creation (in the analysis you select, when multiple analyses are available). For details, see Output Control.

Solver: Mesh Adaption

  Controls if and how the mesh will be automatically refined during the solution (in the analysis you select, when multiple analyses are available). This technique can be used to refine the mesh to a particular flow feature whose location is unknown prior to starting the analysis, such as a shock wave. For details, see Mesh Adaption.

Solver: Expert Parameter

  Provides advanced control of the CFX-Solver (in the analysis you select, when multiple analyses are available). For most analyses, you do not need to use expert parameters. For details, see Expert Control Parameters.

Solver: Execution Control

  Enables you to define how the CFX-Solver is to be started for a simulation. See Execution Control for details.

Configurations: Configuration / Termination Control

  Simulation controls enable you to define the execution of analyses and related tasks such as remeshing in the simulation. Specific controls include definitions of global execution and termination controls for one or more configurations. See Configurations for additional information.

Release 18.2 - © ANSYS, Inc. All rights reserved.