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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.
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.

Welcome
What's New
View new features for HyperMesh CFD 2024.1.
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 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.
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.
- 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.
  - 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.

View All Altair HyperWorks Help

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.

Its cutting-edge technology, based on the Lattice Boltzmann Method is optimized for GPUs to deliver extreme performance. Therefore, a CUDA-capable NVIDIA GPU device is always required to run ultraFluidX.

Main features of ultraFluidX 2024.1 include:

D3Q27 Cumulant Lattice Boltzmann model for isothermal, unsteady 3D single-phase flows.
CUDA-aware MPI support for multi-GPU and multi-node usage.
Case Setup via Altair’s Virtual Wind Tunnel (support for box-shaped simulation domains).
Automated volume mesh generation with local grid refinement and support for baffle parts.
LBM-consistent Smagorinsky LES turbulence model and wall modeling.
Porous media model (pressure drop) for simulation of multiple heat exchangers.
Handling of rotating geometries via wall-velocity boundary conditions, a Moving Reference Frame (MRF) model, or truly rotating overset grids (OSM).
Support for moving floors (single and 5-belt system) and static floors with boundary layer suction.
Advanced post-processing capabilities, for example, window averaging, spatial drag/lift contribution, probe output and section cut output.