ACUSIM Software has been acquired by Altair Engineering and the AcuSolve software is now part of Altair's HyperWorks product line. Click here to obtain latest information about AcuSolve.


AcuSolve™ is a leading general-purpose finite element-based Computational Fluid Dynamics (CFD) flow solver with superior robustness, speed, and accuracy. AcuSolve can be used by designers and research engineers with all levels of expertise, either as a standalone product or seamlessly integrated into a powerful design and analysis application. With AcuSolve, users can quickly obtain quality solutions without iterating on solution procedures or worrying about mesh quality or topology.

Key Benefits

Robustness Most problems solved on the first attempt

Speed Fully coupled solver on shared-memory and distributed parallel systems

Accuracy Highly accurate in space and time while globally and locally conservative

Key Features and Functionality

Conservative Equations in 3D

  • Incompressible & weakly compressible Stokes and Navier-Stokes equations
  • Thermal analysis and conjugate heat transfer
  • Multi-layered thermal shell equations
  • Multi-species transport equations


  • Gray body enclosure radiation
  • View-factor computation (in parallel)
  • Solar radiation model

Turbulence Models

  • One- and two-equation RANS model
  • Smagorinsky and Dynamic sub-grid scale LES models
  • Hybrid RANS/LES (DES & DDES) models

Arbitrary Eulerian Lagrangian (ALE) Technology

  • Flexible mesh movement
  • Free surface simulation
  • Guide surface technology
  • Sliding mesh technology

Powerful User-Defined Function (UDF) Capability

  • Allows definition of material models, source terms, boundary conditions, etc.
  • Client-server interface with external programs

Component Technology

  • Fan component
  • Heat exchange component

Multiphysics Capabilities

  • Rigid body dynamics coupling
  • Practical Fluid/Structure Interaction (P-FSI)
  • Direct-Coupling Fluid/Structure Interaction (DC-FSI)

Support for Computational Aero Acoustics (CAA) Simulations

Unstructured Mesh Support

  • 4-node tetrahedron, 5-node pyramid, 6-node wedge, 8-node brick, and 10-node tetrahedron elements

Highly Effective Solver Technology

  • Novel and highly efficient iterative solver for fully coupled pressure/velocity equation systems
  • Fully coupled temperature/flow iterative equation solver
  • Fully parallel on shared and distributed memory machines, transparent to the user

Particle Tracer

  • Fast and accurate parallelized particle tracer
  • Laminar and turbulent diffusion

Supported Platforms

  • Windows XP/Vista/Windows 7 (32 and 64 bit)
  • Windows HPC Server 2008
  • Linux (x86, x86-64 and Itanium)
  • HP-UX (PA-RISC and Itanium)


  • AcuSolve™ | A Powerful General-Purpose Flow Solver. View
  • Other datasheets and collaterals are available here.