Home
Setup
Prepare your model and run the simulation.
General Setup
Prepare your model for a general AcuSolve simulation.
Flow
Set up the simulation model, materials, domains, and boundaries.
Domain
Define the simulation domain.
Create Reference Frames
Use the Reference Frame tool to define rotating reference frames on solid bodies or surfaces.

Welcome
What's New
View new features for HyperMesh CFD 2024.1.
Get Started
Learn the basics and discover the workspace.
Onboarding Resources
Discover HyperMesh CFD functionality with interactive tutorials and community resources.
Solution Layers
Solution-centric workflows allow you to traverse through modeling environments using a dedicated UI layer.
Manage Files and Data
Create, open, import, and save models.
Convert
Use the Convert tool to convert entire models between data types.
Geometry Modeling
Manage CAD, FE, and 2D parametric sketch geometry.
Meshing
Generate surface/volume mesh by defining mesh controls, or interactively create and edit 2D surface mesh.
Setup
Prepare your model and run the simulation.
- General Setup
  Prepare your model for a general AcuSolve simulation.
  - Flow
    Set up the simulation model, materials, domains, and boundaries.
    - Setup
      Define global simulation settings, materials, and any multipliers or parameters.
    - Domain
      Define the simulation domain.
      - Assign Materials
        Use the Material tool to assign materials to solid bodies.
      - Define Thin Solids
        Use the Thin tool to define thin thermal layers on surfaces and assign material properties.
      - Define Porous Domains
        Use the Porous tool and its satellite icons to define Cartesian, cylindrical, and spherical porosity on solid bodies.
      - Create Sources
        Use the Sources tools to specify a collection of body forces (heat, momentum, or species) within solid bodies.
      - Create Reference Frames
        Use the Reference Frame tool to define rotating reference frames on solid bodies or surfaces.
      - Define Heat Exchanger Components
        Use the Heat Exchanger tool to specify heat exchanger components for a solid.
      - Define Fan Components
        Use the Fan Component tool to model a fan by specifying fan characteristics on a solid.
    - Boundaries
      Define surface boundary conditions.
  - Radiation
    Define radiation conditions and create emissivity models.
  - Motion
    Define direct, derived, and constrained mesh motion.
  - Solution
    Define output conditions, run the simulation, and view the results.
  - AcuTrace
    AcuTrace is particle tracer that runs as a post-processor to AcuSolve.
- Aerodynamic and Aeroacoustic Setup
  Prepare your model for wind tunnel analysis using ultraFluidX.
Post-Processing
Post-process the simulation results by creating visualizations and measurements.
Automation
Automate simulation processes with templates and utility scripts.
Design Exploration
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.
Solver Help
More resources for AcuSolve and ultraFluidX solvers.

View All Altair HyperWorks Help

Create Reference Frames

Use the Reference Frame tool to define rotating reference frames on solid bodies or surfaces.

From the Flow ribbon, click the Reference Frame tool.

Figure 1.
Select surfaces and/or solids.
Use the guide bar selectors to filter which entity type you can select.
If the Include bounding surfaces option is active, selecting a solid will automatically select all the corresponding bounding surfaces.
Click Axis on the guide bar.
Left-click to position the axis of rotation in the modeling window.

Tip: Use snap points to position the axis on existing points, lines, surface centers, etc.
Use the options in the microdialog to further align the axis.
- Click to flip the rotation direction.
- Click X, Y, or Z to align to the global axes.
- Click to position the axis using the Vector tool. Once the position is defined, press Esc to return to the current tool.
Enter an angular velocity value (rad/sec) in the text box.
Click and select which forces should be considered.
From the guide bar, execute the command in the following ways:
- Click to confirm your selection and remain in the tool.
  This allows you to continue creating instances and helps you visualize and edit instances with the legend.
- Click to confirm your selection and exit the tool.