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Solver Help
More resources for AcuSolve and ultraFluidX solvers.
ultraFluidX User Guide
View detailed information regarding the features, functionality, and simulation methods available in ultraFluidX.
Thermal Simulation Parameters
The following section explains the various simulation parameters that are used when setting up a thermal simulation using ultraFluidX. These parameters are included in the standard sections of the solver deck as used for non-thermal simulations, but are listed here separately for clarity.

Welcome
What's New
View new features for HyperMesh CFD 2025.1.
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 Repair
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.
Post-Processing
Post-process the simulation results by creating visualizations and measurements.
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.
Automation
Automate simulation processes with templates and utility scripts.
Solver Help
More resources for AcuSolve and ultraFluidX solvers.
- AcuSolve Help
  Click here to access AcuSolve online help.
- ultraFluidX User Guide
  View detailed information regarding the features, functionality, and simulation methods available in ultraFluidX.
  - Overview
    ultraFluidX is a simulation tool for the prediction of the aerodynamic properties of passenger and heavy-duty vehicles, as well as for the evaluation of building and environmental aerodynamics.
  - Use ultraFluidX
    Check system requirements and launch ultraFluidX.
  - Simulation Parameters
    Available parameters for defining simulations in ultraFluidX.
  - Thermal Simulation Parameters
    The following section explains the various simulation parameters that are used when setting up a thermal simulation using ultraFluidX. These parameters are included in the standard sections of the solver deck as used for non-thermal simulations, but are listed here separately for clarity.
    - <simulation>
      For thermal simulations, the <simulation> category contains additional parameters describing thermal method, thermal wall model, initialization of temperature field, setup of gravity, surface mesh and the fluid material.
    - <boundary_conditions>
      Each instance of a boundary condition (including the wind tunnel sides, inlet and outlet, wall instances) requires a thermal boundary condition to be added.
    - <sources>
    - <output>
      The <output> category specifies the main parameters for various types of simulation output.
  - Expert Parameters
    Additional expert parameters can be used to fine-tune simulations.
  - Post-Processing Tools
    For certain aeroacoustics applications, such as fan noise, HVAC noise and train community noise, you need to evaluate flow-induced noise levels at microphones located far away from the turbulent regions simulated in ultraFluidX.

Thermal Simulation Parameters

The following section explains the various simulation parameters that are used when setting up a thermal simulation using ultraFluidX. These parameters are included in the standard sections of the solver deck as used for non-thermal simulations, but are listed here separately for clarity.