Altair HyperMesh CFD 2025 Release Notes

Highlights

HyperMesh CFD 2025 introduces the following new features:

Case setup (External Aerodynamics):
  • Ground patch visualization
Post-processing:
  • 3D hydrodynamic acoustic map computation in the GSP tool
  • Export option for time-dependent data written to VTKHDF
  • ISO standard center frequency for octave and fractional octave output
  • Additional supported files from the Import/Open menu

Geometric Modeling

No changes have been introduced to CFD Geometric Modeling in HyperMesh CFD 2025.

Case Setup

New Features

Ground patch visualization
The ground patch around the vehicle is now graphically displayed on the wind tunnel floor when the “Enable ground patch” option is enabled.
Figure 1.

Resolved Issues

  • XML issues:
    • Turbulence offset was not editable
    • Wheels were misidentified as body parts
    • Merge output files option was written incorrectly
  • Attribute sync issues:
    • Mesh refinement for OSM/MRF volumes should be in sync with property editor
    • Scaling factor gets reset on closing run dialog
    • Fan can be accidentally setup twice leading to mismatch in properties when reset to body
    • Number of layers in offset refinement is not refreshed
    • Visibility of turbulence source without mesh control is reset
    • Virtual fan coefficients get reset without enter key
  • Multiple database imports no longer create multiple wind tunnels
  • Warning added when deleting run from run dialog
  • Fixed segmentation errors:
    • On fan axis reset using axis buttons
    • Fan axis reset on tab/enter keys
    • On selecting “Identify” part as body

Post-Processing

New Features

Provide capability to compute 3D hydrodynamic acoustic map in GSP tool
Provides the capability to compute three-dimensional hydrodynamic acoustic maps from the GSP tool. The existing GSP functionality is primarily focused on surface data and computation of SPL (dB), this improvement seeks to extend it to handle volumetric pressure or velocity data to compute the power spectrum.
Add "Export" option for time-dependent data
Provides the addition of an "Export" option for time-dependent data in HMCFD written to VTKHDF. This feature enables users to create an extract database from transient datasets, which can be loaded separately for faster interaction and manipulation.
ISO standard center frequency for octave and fractional octave output
Modifies the center/min and max frequencies for GSP when band type is octave or fractional octave. ISO standards have been applied to HyperMesh aeroacoustics results output.
Add supported files from Import / Open
Provides the addition of VTKHDF (.series) and Ensight Gold result files to the list of supported file types by group for results import.

Resolved Issues

  • Export to h3d when time-dependent data is loaded now retains correct timestep data and range
  • HMCFD Report: Streamlines, seed_type=rectangular has been updated to include each cartesian direction
  • Session no longer crashes when loading specific .h3d file created by Physics AI
  • AcuSolve Log Reader options with “Derived Quantity Output” no longer gives active exception when results are not available

Solution

New Features

No changes have been introduced to CFD Solution in HyperMesh CFD 2025.

Known Issues

For more information on issues found throughout the release, and their workarounds, please see the Altair Community.