The latest software version

Gexcon is proud to announce the release of FLACS 25.3, the latest version of our advanced CFD software for dispersion, fire, and explosion modelling.

This update brings a range of practical improvements designed to help engineers and consultants in the process industries work more efficiently and with greater confidence. The latest version can be accessed here.

The key improvements include:

• Improved flammability predictions for gas mixtures

• Faster simulations with lower storage demands

• Refinements in pre-processing, multiscenario, autogrid and geometry handling

• Solver and model updates for more consistent results

FLACS 25.3 introduces a refined approach to estimating the Lower Flammability Limit (LFL) of gas mixtures using a modified Le Chatelier model. This change provides more accurate results for mixtures containing inert gases and adjusts the lean side of SLAM curves for improved ignition and flame propagation.

Simulation speed is improved by reducing data dump frequency by a factor of 50, significantly lowering runtime and storage requirement enabling quicker project turnaround especially for simulations performed in cloud-based environments.

Enhancements in CASD for importing and handling geometries including better handling of DWG files, automatic repairing of meshes and improved porosity handling. Some improvements have also been made to multiscenario to improve the user experience:

• Smarter leak and inventory handling through the introduction of new preset nodes

• User experience improvements and fixes relating to node properties

• Ability to export scenario lists with relevant data from the Table View for quick and easy use in reports

The Dynamic Water-Spray (Lagrangian) model now uses less memory and couples more efficiently with the radiation model, improving results for fire suppression analysis.

Dust explosion interpolation has been smoothed near flammability limits, producing more stable and consistent overpressure trends.