Case Setup

New Features

Thermal Simulations
Temperature is now supported as a transport variable. This enables a range of simulations, such as powertrain cooling, thermal convection, and passive scalar transport. Features include:
  • Model selection: Boussinesq and Passive scalar.
  • Thermal boundary conditions for solid parts and the wind tunnel.
  • Absorbing boundary conditions for the wind tunnel inlet and outlet.
  • Advanced heat exchanger models with coolant properties.
  • Updated outputs and output controls to account for temperature as a variable.
  • Updated temperature dependent material properties.
  • Gravity setup.
Guide Panel for Wheels with Overset Mesh
Wheels are now set up using a guide panel, which replaces the guide bar. This workflow follows the fan setup process and includes features such as overset mesh setup and optional mesh control settings.
Figure 1.


Yawed Simulations
Yawed vehicle simulations are supported via a standalone dialog that lets you set up rotational transformations. This automatically applies the yaw angle to belts and creates an STL-based belt part. The boundary condition for the belts can be independently set and supports vectors that are different from the inflow condition.
Figure 2.


Multiple STL Export
The model assembly can now be split up into multiple STL files on export. This is performed automatically by the sub-assembly structure, one STL for each. You can control the output by organizing parts in sub-assemblies. The feature can be combined with compression and is set up in the Preferences menu.
Virtual Fan with Momentum Source
Momentum sources are now specified as a sub-model of the Virtual fan setup. Velocity and mass flow rate are both available.
Double-click from the Property Editor
Edit mode can be activated for derived entities directly from the Property Editor. All outputs and mesh control instances can be accessed right from the Property Editor with a simple double click.

Enhancements

Inline Unit Switching
Solver units such as time steps and output intervals now support inline switching to time(s) and frequency (Hz). This is available in the Output and Run dialogs.
Figure 3.


Outputs
  • Triangulation is supported for section cuts.
  • Triangle splitting is supported for monitoring surfaces.
Vorticity, Q-criterion, and Lambda are Supported as Output Variables
  • Sectional drag is activated by default.
  • Wind tunnel position is adjusted based on the vehicle’s bounding box.
  • Updated icon graphics.
Python API
Added support for:
  • Mesh transition layers.
  • Output variables.

Resolved Issues

  • Crash upon editing sketches.
  • Crash upon editing output frequency in the Output Controls dialog.
  • Batch mode in Linux.
  • Mesh controls dialog gets reset when opened for the first time.
  • Permeability directions for porous media are not visible unless edited.
  • XML parameters resolved for the following scenarios:
    • Virtual fan settings for “ramp up iterations” and “initial pressure rise”.
    • Coarsen output settings in the Output Controls dialog.
    • Fluid BC and thermal BC are grouped into the same wall instance.
  • Offset mesh distance was incorrectly computed.
  • Inconsistent computations for repeated modifications to run time (steps) and scaling factor.
  • Triangulation for section cuts is shown in the Property Editor.
  • Triangle splitting option for belts is now functional when reimporting a template file.
  • Objects created in Python differed from those created in the user interface when saved as HyperMesh CFD files.
  • Ground patch was visible as a part when importing a HyperMesh CFD file.
  • Editing ground patch in Python created a second instance.
  • Editing target frequency in the Outputs menu shows the correct value after a focus loss.
  • Visibility issues with selecting Nastran parts.
  • Icons in dialog windows are correctly shown.