FLACS-Fire Djurre Siccama Gexcon R&D and Software VP Products
Introduction to FLACS-Fire GOAL: Provide FLACS users with an efficient complete toolbox for dispersion, explosion and fire modelling. Calculation times in hours/days and not weeks/months User friendly interface and quick learning curve More realistic modelling vs. emperical tools Especially suited for industrial type fires including high momentum jet fires
FLACS-Fire Development time-line FLACS-Fire development started Official Release FLACS-Fire External Beta testing Internal Beta testing Continuous development, optimisation, validation and testing 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 Today
FLACS-Fire Capabilities Jet fires Poolfire model (fully coupled model included) 6-Flux and DTM radiation models Output: Temperature, radiation, toxic concentrations, soot, visibility, etc. Commercial Release date: September 2014
FLACS-Fire: Program flow chart Flow Heat Transfer FLACS RANS Model Continuity & Momentum Energy Equation Incompressible Solver Compressible Solver FLACS - FIRE Turbulence Combustion Soot Radiation Radiative properties k-epsilon model Fire Model Eddy Dissipation Concept (EDC) Formation-oxidation Model (FOX) 6-Flux Radiation Model Discrete Transfer Model (DTM) Coupled WSGGM Uncoupled WSGGM
Summary validation Sub-model validation: DTM Radiation model 2-D square cavity (2 cases) Box-shaped experimental furnace (2 cases) L-shaped geometry (3 cases) Cube (4 cases) 3-D rectangular enclosure with non-uniform mixtures of CO2 and H2O (3 cases) 3-D enclosure with non-uniform mixtures of CO2, H2O and soot (8 cases) Parameters validated: Radiative source term (input to enthalpy equation), radiative heat flux Jet Fire validation cases Small scale Jet fire in cross wind (2 cases) Large-scale field experiments (1 case) SINTEF Impinging propane jet fire (9 cases) HSL Propane flash fire (2 cases) Large scale LNG Flare (7 cases) SINTEF Enclosure jet fire (2 cases) Steckler compartment fire (2 cases) Ethylene jet Fire (2 cases) Parameters validated: Gas temperature, mixture fraction, flame length, flame shape, velocities, radiative heat flux, total heat flux, heat dose, species concentration of H2O and CO2
Application areas Passive Fire Protection (PFP) optimization* Flare studies Escape route impairment (heat, smoke, toxic, visibility) Vessel heat up modelling* Risk based fire modelling* Fire and smoke detection* Accident investigation Visualisation, hazard awareness, training * Requires additional post-processing
Sensitivity to DTM ray number 69k cells; 48 Rays CPU time: 0.35 hr DTM: 25% Memory: 200MB 69k cells; 75 Rays CPU time: 0.4 hr DTM: 35%% Memory: 300MB 69k cells; 108 Rays CPU time: 0.45 hr DTM: 43% Memory: 400MB 69k cells; 192 Rays CPU time: 0.6 hr DTM: 57% Memory: 700MB 69k cells; 432 Rays CPU time: 1.0 hr DTM: 75% Memory: 1.5 GB 69k cells; 4000 Rays CPU time: 7.4 hr DTM: 97% Memory: 14.6 GB
FLACS-Fire demo Radiation Combustion Soot Conduction
Application areas Scenario: Jet fire Release: Natural Gas Initial rate: 24 kg/s Duration: 60 sec
Application areas Scenario: Pool fire Release: Crude oil Pool size: ± 200 m 2 Duration: 45 sec
Application areas Scenario: Pool fire Release: NG condensate Pool size: ± 725 m 2 Duration: 60 sec
Application areas
Application areas Scenario: Jet fire Release: Natural Gas Initial rate: 47 kg/s Duration: 80 sec
Application areas Scenario: Pool fire Release: LNG
Application areas Scenario: Pool fire Release: LNG
Application areas Scenario: Pool fire Release: Crude oil Pool size: ± 2000 m 2 Duration: 45 sec
FLACS-Fire Structural response Proof of concept FLACS => Impetus FEA Note: Commercial coupling tool not yet available!
FLACS-Fire roadmap (preliminary) FLACS-Fire Product Roadmap Product releases 2015 Jan Feb Mar Apr May June July August Sept Oct Nov Dec FLACS-Fire 10.3r3 FLACS 10.4 FLACS-Fire 10.4r2 Enter Statoil approval process Validation document (Internal) Validation document (External 1m) Conduction model (1-2 months) Update Validation documents DTM partial porosities Blind validation Maintenance and other improvements Blind validation Statoil Oil barrel experiments (2-3 months) Uncoupled Pool Fire (1 month) Coupled Pool Fire,PM1 (1-3 months) Coupled Pool Fire,PM3 (1-3 months) Hydrocarbon absorbtion (1 month) Validation document (External 1m) Validation document (Internal Version) (3 months) Modelling of lift-off, use of detailed chem mech(1-3 months) Two stage chemistry with EDC (1-3 months) Soot Model Additional validation (1-3 months)
Summary FLACS-Fire is available now FLACS-Fire has been validated, benchmarked and tested by internal and external consultants Efficient because similar workflow can be used as for other FLACS studies Easy and quick to extend your existing capabilities to CFD fire studies and provide additional value to clients
Q&A and feedback
Thank you for your attention! FLACS-Fire Presentation 2015
Additional Slides
Standards: 25 NORSOK Z-013: Risk- and emergency preparedness analysis Requirements for Probabilistic Fire analysis:
Fire risk assessment Procedures FABIG TN 11 (depricated) FABIG TN 13
Flare Impact Study Standards API RP 520 API RP 521 API RP 537
Flare Impact Study