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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.
<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.

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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.

<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.

This is done by using the section <thermal_bc_settings> on each existing boundary condition instance along with the <fluid_bc_settings>.

<thermal_bc_settings>: <type> (adiabatic, temperature), default: adiabatic; If the thermal boundary is adiabatic, no further information is required; if the thermal boundary type is set to temperature, a temperature value must be indicated.; <temperature> default: material temperature; Temperature of the boundary in [K].
Note: If ultraFluidX detects zero temperature difference in the entire setup, then the simulation will terminate with an error message.