Fire & Explosion / CFD

CFD for Fires and Explosions

There is often a need to performed detailed Computational Fluid Dynamics CFD modelling to compare layout options, examine the benefit of incorporating additional fire/blast walls, determine Design Accidental Loading (DALs). We have carried out hundreds of  such studies including: 

• Consequence analysis for targeted events;

• Probabilistic Analysis for onshore and offshore facilities; 

• Optimisation of equipment layouts/orientation;

• Maximisation of natural ventilation and blast venting;

• Impact of fire/blast wall layout and additional barriers;

• Benefit of additional fire/blast barriers;

• Optimisation of gaps between modules;

• Plated versus grated decks;

We have designed  our own   explosion modelling software which is easy to use and far more accurate than existing analytical relations which are the most widely used method ( see video ). Our experts  also have unparalleled expertise in a number of other software including FLACS, EXSIM FLUENT and others. 

Helideck Studies and Thermal Plume Analysis

Helideck studies are  performed using CFD.  Typically a  study will include simulations of wind flow to assess if general air flow conditions above helideck is in line with requirements of the CAP 437 standard.

 

The result from the analysis is usually compared to the requirements of the relevant standard ( often CAP 437) and it identifies what percentage of  time during a year when requirements are breached.   These studies are best carried out using software that has advanced turbulence capabilities such as FLUENT, ACE or CFX. 

For thermal plume analysis, simulations of exhaust releases and other potentially relevant release sources (fin fans, large HVAC outlets etc) are carried out using CFD.  The objective of these simulations will be to assess whether exhaust releases will affect items in the plume's vicinity such as crane operator cabins and helidecks and cause unacceptable temperature gradients or dangerous operating conditions.

 

Fire and Gas Detection Studies

We use CFD to model fire and gas detection systems are an important risk reducing measure on facilities where there is potential for fire, explosion, or toxic releases. 
The Fire & Gas detection system should enable mitigation of hazardous conditions such as fire or loss of containment by performing three basic functions:
• Detect the Hazard;
• Alert People;
• Initiate Action.

The use of CFD enables the optimisation of detector placement in order to enable the detection of all significant releases, while not unnecessarily hindering facility operation using the minimum number of detectors possible. CFD of fire and gas detection systems are some of the most cost effective studies any major hazard facility can carry out. 

 

CFD-Other

We also carry out  general purpose Computational Fluid Dynamics (CFD) analysis support in a wide range of applications including  

 

Flow assurance in gas and liquid pipelines

Modelling cavitation and turbulence

Liquid sloshing  modelling 

Heat exchangers modelling 

Pipe and valve erosion

Natural and forced ventilation of buildings

HVAC systems