Home
Setup
Prepare your model and run the simulation.
General Setup
Prepare your model for a general AcuSolve simulation.
Radiation
Define thermal and solar radiation.
Thermal Radiation
Define thermal radiation conditions.
Define Surface Finish Models
Use the Surface Finish Library tool to create, delete, and import/export surface finish models. A surface finish definition is an ideal grey-surface emissivity model used in the radiation equation.

Welcome
What's New
View new features for HyperMesh CFD 2025.
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 thermal and solar radiation.
    - Thermal Radiation
      Define thermal radiation conditions.
      - Set Up the Thermal Radiation Settings
        Use the Physics tool to turn on thermal radiation physics and define the thermal radiation settings used in the simulation.
      - Define Surface Finish Models
        Use the Surface Finish Library tool to create, delete, and import/export surface finish models. A surface finish definition is an ideal grey-surface emissivity model used in the radiation equation.
      - Define Default Surface Conditions
        Use the Defaults tool to define global surface conditions for thermal radiation.
      - Assign Surface Finishes
        Use the Surface Finish tool to apply surface finish properties to selected surfaces.
      - Define External Radiation
        Use the External tool to apply external radiation heat transfer to selected surfaces or thin solids.
      - Define Radiation at Openings
        Use the Opening tool to apply radiation boundary conditions at openings. A radiation opening definition provides a method of fully enclosing a fluid domain that is not surrounded by walls. This condition is appropriate for inlet and outlet type boundary surfaces.
      - Define Radiation Output
        Use the Output tool to apply radiation output settings to selected surfaces.
    - Participating Media
      Define participating media radiation conditions.
    - Solar Radiation
      Define solar radiation conditions.
  - 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

Define Surface Finish Models

Use the Surface Finish Library tool to create, delete, and import/export surface finish models. A surface finish definition is an ideal grey-surface emissivity model used in the radiation equation.

Create Surface Finishes

Use the Surface Finish Library tool to create new surface finishes.

From the Radiation ribbon, click the Surface Finish Library tool.

Figure 1.

The Surface finish library opens.
A surface finish named Black Body is available by default.
Click to add a new surface finish.
Optional: Double-click on the Name field to rename the surface finish.
Double click the Emissivity field and enter an emissivity value.
If multipliers have been defined, double-click the Emissivity Multiplier field and select an option from the drop-down menu.

Delete Surface Finishes

Use the Surface Finish Library tool to delete an existing surface finishes.

From the Radiation ribbon, click the Surface Finish Library tool.

Figure 2.

The Surface finish library opens.
Select the surface finish to delete.
Click .

Note: The default surface finish, Black Body, cannot be deleted.

Import and Export Surface Finish Libraries

Use the Surface Finish Library tool to import and export defined libraries of surfaces finishes.

From the Radiation ribbon, click the Surface Finish Library tool.

Figure 3.

The Surface finish library opens.
Click to export the entire surface finish library.
Click to import a previously defined surface finish library.