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TransAT 5.3

The new desktop version of TransAT Suite – with the modules HPC, Multiphase and Multiphysics- is now available for download. This release is compatible with both Linux based and Windows Operating Systems (OS). The installation package consists of an installation manual and an installer. The in-built demo license allows running simulations for 1 hour using maximum 4 processors.

Transat is available for download in the ASCOMP customer portal. A free demo version of TransAT is available for users with a valid account.


Please use the following link to go the registration form. The request will be processed and once the account is created you will receive a mail with username and password to login to the customer portal here


TransAT can be downloaded in the customer portal after registration. More information can be found here.


Trouble shooting

  • Problems encountered in the installation of the Windows version, Expand
    1. Uninstall the Microsoft Visual C++ 2010 redistributable packages (both x86 as well as x64) from “Control Panel” > “Programs and Features”
    2. Install the Windows SDK 7.1. During installation, under the “Installation Options” menu, UNCHECK the “Visual C++ Compilers” and “Microsoft Visual C++ 2010? components
    3. Apply the SDK 7.1 patch: http://www.microsoft.com/en-us/download/details.aspx?displaylang=en&id=4422
    4. Reinstall the Microsoft Visual C++ 2010 redistributable packages
  • Possible problems encountered when running initial conditions Expand

    The issue can occur when running initial condition: if at the end of the text output of initial conditions, you see an output similar to this:

    c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\intrin.h(26) : fatal error C1083: Cannot open include file: ‘ammintrin.h’: No such file or directory

    NMAKE : fatal error U1077: ‘”c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\Bin\amd64\cl.EXE”‘ : return code ’0×2′


    ERROR compiling …

    Then, it is a Microsoft issue. It can be fixed following these steps:

    • Download the file ammintrin. Right-click link and choose ‘Save target/link as’
    • Copy this file in “C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\”.
Release notes TransAT 5.3.x
  • September 09 2017 TransAT 5.3.1, Expand
    • SArP Module
      – The Smart Adaptive run Parametrization (SArP) module controls the convergence of simulations: It monitors solver convergence, residuals and time steps.
      – Upon convergence issue detection in simulations, the correction and optimization feature of the SArP module is automatically triggered to adjust the numerical parameters.
    • GUI structure changes
      – Update of graphical user interface workflow
      – Improvement and reorganization of inputs
      – Restructure of the objects interface for loading object files
  • August 30 2017 TransAT, Expand
    • Bug fixes
      – Stop restarted parallel steady simulations at convergence
      – Velocity outflow in z-direction using immersed surfaces
      – Improvement of wall-shear estimation in RANS simulations
  • April 26 2017 TransAT, Expand
    • TransAT Fixes
      – Windows: installer for advanced intitialconditions
      – Windows: build environment (for building UDF’s)
  • Mar 14 2017 TransAT, Expand
    • TransAT
      – Fix for massflux printed by section output for single phase flow and Level-Set method
      – Fix for void fraction calculation at the pressure outflow boundary for homogeneous model
      – Time signals and section output features are activated automatically
    • TransATUI
      – Improvements for handling checkbuttons, value inputs, text buttons
      – Improvements for handling sliders
      – Bugfix for resizing blocks with BMR
      – Turbulent dispersion activated automatically with RANS
  • Jan 23 2017 TransAT 5.3, Download
Release notes TransAT 5.2.x
  • May 26 2016 TransAT 5.2.4, Expand
    • Improved Embedded-Surface-Multiphase discretization
      Stability improvement embedded surfaces + multiphase flows, preventing
      oscillations and keeping time step constant
  • Apr 10 2016 TransAT, Expand
    • Bugfix for reading the contact angle from the BC file
  • Feb 26 2016 TransAT, Expand
    • Correct volumetric heat source calculation
      for conjugate heat transfer from the total
      heat source given in TransAT-UI
    • Correct calculation of effective conductivity for
      conjugate heat transfer & turbulence
  • Sep 30 2015 TransAT_5.2.3.1, Expand
    • python script improvement to find out OS
  • Jul 31 2015 TransAT 5.2.3, Expand
    • bugfix for conjugate objects
  • May 27 2015 TransAT 5.2, Expand
    • New GUI with minimal look (show only inputs/buttons that are important)
    • Porosity + Darcy term available from User Interface
    • Improved algorithms (drift flux model, turbulent dispersion, k-epsilon)
    • Simplified licensing
    • Demo mode (1 hour runtime, max. 4 processors)
    • new windows installer (dependency checks, unit tests)