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Flow Science Releases FLOW-3D V9.1
Posted Tue February 21, 2006 @05:40PM
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News Flow Science, Inc. announces the availability of a new release of its FLOW-3D® computational fluid dynamics software. Version 9.1 of FLOW-3D® offers users an advanced new VOF technique, extensions to the powerful General Moving Objects model introduced last year and numerous other enhancements to users’ modeling options.

In addition, Version 9.1 will support 64-bit Windows and Linux RedHat Enterprise 3.0 for the x86 64-bit processors in AMD Opteron and Intel Xeon workstations.

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The following is a summary of the key benefits to be found in Version 9.1:

New Models

  1. Split Lagrangian VOF advection model. A new VOF advection model has been added for tracking sharp and diffuse fluid interfaces even more accurately.
  2. Electric conductivity model. An extended “leaky dielectric” model, which works in conjunction with FLOW-3D®’s electric potential, electric charge and dielectric models, is introduced.
  3. Cavitation potential model. This new model is designed to predict die erosion due to cavitation during filling in high pressure die casting, when metal pressures can drop several atmospheres below the metal vapor pressure in areas of very fast flow.
  4. Two-fluid interface slip model. When an engineer investigates a problem involving two fluids and a sharp interface, where the ratio of the densities of the two fluids is large, the velocities of the fluids at the interface can differ significantly. A new two-fluid interface slip model takes this into account, improving accuracy and stability of the flow solution.


  1. General Moving Objects. The model has been extended to enable moving components to have the same heat transfer and mass source capabilities as non-moving components. Additional extensions allow for moving history probes and non-inertial forces on moving components and the ability to model particles adhering to moving objects.
  2. Air Entrainment. The air entrainment model has been modified to allow for its use without requirement of initiating any turbulence model and to model bulking and the escape of air back into the atmosphere.
  3. Two-fluid phase change. Two new capabilities have been added to the two-fluid (liquid and compressible gas) evaporation/condensation model: (a) allow condensation in pure gas and evaporation in pure liquid for both sharp and diffuse interface cases and (b) allow for preferential vapor nucleation (boiling) at solid walls.
  4. Surface tension. The accuracy of free surface curvature evaluation has been improved by including more fluid cells in the calculation. Additional improvements in free surface normal evaluation result in reduced noise in surface tension pressure. These enhancements, combined with the new Split Lagrangian VOF method, improve the accuracy of the surface tension model in general.
  5. Graphical User Interface. The FLOW-3D® graphical user interface has been improved to allow for more complete setup via the interface, rather than text input, and to add numerous other user conveniences. In addition, the visualization suite has been enhanced significantly with streamlines and vectors for 3D plots, the ability to view mesh and geometry file overlays and additional output options.

Supported Platforms

Flow Science is also proud to announce several additions to supported platforms for this new release. Version 9.1 will support 64-bit Windows and RedHat Enterprise 3.0 for the x86 64-bit processors in AMD Opteron and Intel Xeon workstations. In addition, Version 9.1 will also support Windows XP Pro IA64 and Windows Server 2003 IA64 for the Intel Itanium 2 workstation. Moreover, for the first time, FLOW-3D® will also be able to be run in shared-memory parallel mode on 32-bit Linux and 64-bit processors running both Windows and Linux.

Flow Science has commenced shipment of the new release to customers under maintenance contracts.

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