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Understand how geometries and terrain affect explosions and their consequences

The EXSIM software leverages the power of computational fluid dynamics (CFD) to accurately model explosions in various scenarios. 

Featuring computer-aided design (CAD) import and editing capabilities, the EXSIM software seamlessly integrates complex geometry models, ensuring an efficient and precise representation of the impact of 3D geometries on explosion simulations. 

With a proven track record since 1989, the EXSIM software has been employed in both industrial analyses and CFD explosion research. It boasts extensive validation against a wide range of explosion experiments, from large-scale tests to blind testing, making it a reliable and trusted solution for explosion simulations.

Minimize the impact of explosions through layout optimization

The EXSIM software’s advanced explosion modelling, which is based on the Eddy Dissipation Concept (EDC), allows for accurate predictions across a diverse range of fuel types, including hydrocarbons and emerging materials like hydrogen. 

Designed for both onshore and offshore facilities, the EXSIM software effectively models explosions with an intuitive graphical user interface that streamlines the setup process, enabling users to complete small and medium-sized simulations in minutes. 

Continually developed to support the evolving energy landscape, the EXSIM software boasts enhanced predictive performance and stability for various scenarios, including those involving alternative fuels.

Optimize the design of explosion mitigation measures

The EXSIM software can present overpressure predictions as a function of space and time or averaged over surfaces and show effects of wall failure and opening of blast panels. 

It includes comprehensive post-processing capabilities, such as video presentations and various visualizations in the CAD geometry.

EXSIM software pricing and licencing

Licensing plans available for local installation on your PC or network for single / multiple concurrent users. 

Access available from 1 month to perpetual licenses.

 

EXSIM software training

We offer a technical software course to help you get the most out of our product. You can join us in person, online or book a private training course.

Join the organizations using KFX and EXSIM for computational fluid dynamics analysis

View the full customer list

Frequently asked questions

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KFX/EXSIM is specifically developed for safety-related applications, addressing scenarios such as gas dispersion, fires, explosions, and other industrial challenges. Its features include the porosity technique, Lagrangian model for droplet releases, the ability to handle multiple simultaneous releases in a single model, and seamless integration with Finite Element software for structural response analysis. 

Extensive usage and testing in numerous industry studies, both by DNV and external customers, have established KFX as a robust and stable simulator. Furthermore, the software has been developed in close collaboration with industry partners to best understand and address industrial needs efficiently and accurately. Notably, ongoing advancements include an advanced liquid CO2 release model that accounts for complex thermodynamics, two-phase releases, dry-ice formation and deposition, as well as obstacles, terrain, and wind conditions.

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The competence behind KFX/EXSIM is the result of four decades of focused research, continuous development of fire simulation software, and consultancy work within turbulent flow and combustion, with funding from industry and the Research Council of Norway. Widely used in the industry, KFX/EXSIM is a leading CFD simulator for dispersion, fire, and explosion simulations. Extensive validation has been conducted, ensuring accurate results, and ongoing validation is based on experiments carried out in DNV Spadedam and with industry partners. KFX includes advanced Lagrangian models for fire mitigation and extinction using various water systems. It is also seamlessly interfaced with the KFX Usfos finite element structure response code, enabling non-linear dynamic structural response analysis. Additionally, KFX offers powerful CAD and topography import capabilities, allowing for automatic conversion of CAD geometries and easy handling of electronic maps. DNV's collaboration with industry partners on Joint Industry Projects (JIPs) focused on hydrogen, ammonia, and CO2 safety further enhances the software, with research results from these projects being integrated into KFX.

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Computational fluid dynamics (CFD) is the use of numerical methods to analyse fluid flows, helping predict flow patterns, heat transfer and chemical reactions. It leverages algorithms and computational resources to simulate how fluids interact with physical boundaries. 

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CFD software facilitates the simulation and analysis of fluid flow, allowing engineers to visualize and predict fluid dynamics in various environments. It includes tools for setting up simulations, solving fluid dynamics equations and visualizing the results for interpretation. 

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Testing of the software includes:  

  1. Verification of the consequence models to ensure that the code correctly solves the associated mathematical model  
  2. Validation of the results against experimental data 
  3. Sensitivity analysis by varying a large number of parameters to ensure overall robustness of the code 

DNV has produced a document describing the verification and validation process for the KFX/EXSIM software. This is available upon request. 

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The recommended specification for KFX/EXSIM is as follows: 

No Citrix, Microsoft, Oracle VirtualBox, VMware virtualization tools, e.g. XP mode on Windows7, are supported.

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Product information

  Consequence and QRA webinars

Consequence and QRA webinars

Watch our software webinars.

  Whitepaper

Whitepaper

Access your copy of our Modelling and Simulation of Hydrogen Jet Fires whitepaper.

  Training

Training

Find a course that suits your needs.

  Knowledge and support

Knowledge and support

Download latest versions, learn what's new and search the help library.

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What can EXSIM do for your company?

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