Hazardous Area Classification Consultants (HACC) owner, ADH Risk Ltd, has created and developed its own gas dispersion Computational Fluid Dynamics (CFD) model to provide and deliver physically accurate and costs effective gas dispersion analysis services to its clients. SRAUTAS CFD by ADH Risk Ltd has been used for over a decade for safety, environmental and security impact scenario analysis and support.

SRAUTAS CFD code has been validated, peer-reviewed and used for numerous flammable, toxic and particulate discharge and dispersion studies for Major Accident Hazards (MAH) sites in the UK (Control of Major Accident Hazard, COMAH) and EU (SEVESO) and the code has been reviewed by the UK Health and Safety Executive (HSE) as part of client’s safety cases.

SRAUTAS CFD code handles three-dimensional (3D) models and has been adapted to atmospheric flow and dispersion simulation to account for the effects of complex geometries, terrain, buoyancy and turbulence. SRAUTAS CFD can model coupled physical processes and systems for our clients, including, but not limited to:

  • External and Internal Dispersion Analysis, such as flammable, toxic, dust, smoke particulates, chemical, biological and radiological threats.
  • Architecture and Built Environment Analysis, such as Heating, Ventilation and Air Conditioning (HVAC) effectiveness and efficiencies, particulate distribution, temperature and humidity comfort control methodologies, and odour dispersion.
  • Process Related Modelling, including coupled CFD, transport of mass and energy, chemical reactions and combustion processes.
  • Acoustic Phenomenon, such as noise, acoustic and vibration analysis.
  • Product and Application Development Studies.



SRAUTAS CFD dispersion model has been used and validated against urban and industrial dispersion experimental test data as well as other software codes including integral models. SRAUTAS CFD can and has been used to help industrial companies and organisations analysis and understand their MAH scenarios and confirm whether their gas detector sensors or arrays are located in acceptable locations for protecting people from flammable, toxic, chemical, biological and radiological threats onsite and offsite. 

SRAUTAS CFD can also be used to determine alternative risk reduction measures and safeguards, whether it be for Fire and Gas (F&G) mapping, or implementing baffle, turbulence or redirecting/mitigation devices etc.

If you would like to know more information about SRAUTAS CFD and how this technology can help your company or organisation, please contact us here.

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