Home
Setup
Prepare your model and run the simulation.
General Setup
Prepare your model for a general AcuSolve simulation.
Motion
Define direct, derived, and constrained mesh motion.
Set Up Mesh Motion
Use the Settings tool to define the mesh motion equation to be solved.

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.
  - Radiation
    Define radiation conditions and create emissivity models.
  - Motion
    Define direct, derived, and constrained mesh motion.
    - Set Up Mesh Motion
      Use the Settings tool to define the mesh motion equation to be solved.
    - Direct Motion
      Define explicit motion or motion sources on solids or surfaces.
    - Derived Motion
      Define how to interpolate the effect of the motion created with the Direct tools.
    - Constraints
      Define how the nodes will move around certain surfaces.
  - 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

Set Up Mesh Motion

Use the Settings tool to define the mesh motion equation to be solved.

From the Motion ribbon, click the Settings tool.

Figure 1.

The Setup dialog opens.

Select a mesh motion equation.

Option	Description
Eulerian	Make mesh fixed. All defined motion will be ignored and mesh in domain will not deform.
Arbitrary	Add the ability to move the mesh arbitrarily based on external influence. Can be utilized to simulate a viscoelastic material or to simulate solid/structural direct coupling.
Specified	Enable mesh movement based on the motion or constraints defined on surfaces and solids.

Optional: Turn on external code.
External code can be used to solve Direct Coupling Fluid Structure Interaction (DC-FSI) problems.
1. Click the External code option under Settings and activate the checkbox.
2. Define MotionSolve (rigid body solver) or OptiStruct (structural solver) as the external solver.
3. Define a communication type.
4. If needed, define a multiplier function to scale fields or input/output coefficients to filter fields.
  Click to edit a selected multiplier function.

Tip: If you click Solver controls and deactivate Mesh deformation, the motion equation will not be solved and all definitions will be ignored.