PC Fluid Dynamic Simulation of Fire and Evacuation Scenarios for Large Experiments of Physics

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CERN - European Organization for Nuclear Research . 2. Subjects. IntroductionCFD CodesValidation ApplicationsEvacuation CodesValidation Applications. CERN - European Organization for Nuclear Research . 3. The most effective method to survey flames ..let\'s start with the answer which we require; we need to know:

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CERN - European Organization for Nuclear Research Computer Fluid Dynamic Simulation of Fire and Evacuation Scenarios for Large Experiments of Physics 5 th HEP Technical Safety Forum at SLAC 11-15 Apr 2005

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Topics Introduction CFD Codes Validation Applications Evacuation Codes Validation Applications CERN - European Organization for Nuclear Research

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… For auxiliary respectability Long term divider temperatures Hot gasses temperatures … forever assurance Early stage perceivability Smoke weakening & sythesis Gas temperatures (Radiant warmth) How to survey flames ..how about we start with the appropriate response which we require; we need to know:… Walls and protests Surface Temperature plot Gas Temperature cut plot Mixture division Iso-surface plot Gas Velocity vector plot CERN - European Organization for Nuclear Research

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The thought is : To run completely instrumented little scale genuine fire tests (record fire influence, T, p, sediment, concoction species and focus) to get comes about by interjection of the genuine fire tests by method for semi-observational condition Bigger accuracy and extrapolation of the little scale tests are conceivable, to a specific degree (*), with Computational Flow Dynamic (CFD) How to evaluate fires (proceeded) … a look at the CFD technique… (*) CFD developing exactness and approval implies opportunity to cut back genuine test on materials and cash spared! CERN - European Organization for Nuclear Research

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Market Survey CFD Codes (most referenced) Here are accounted for the most referenced &used CFD codes for Smoke transport-dispersion demonstrating FDS – (National Institute of Science and Technology –MD-US) (free) Phoenics (Concentr. Warmth and Momentum Ldt, GB) (100-2000eu) (Fluent Inc. GB) (price asked for) Flow3d (Flow Science Inc. NM-US) Smartfire (University of Greenwich) (2500eu edu) Jasmine (Ies Limited GB) (12000eu ) Sofie (University of Cranfield – GB) (150eu) CFX Gen.Purpose Dedicated CERN - European Organization for Nuclear Research

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Heiss Dampf Nuclear Reactor at Karlsrhue ~50, completely instrumented oil, propane, links fire tests in the disassembled reactor vessel (20m huge, 50 m high) FDS2 was back-approved against these information at Maryland University Memorial Tunnel Fire Test in US ~100 completely instrumented oil fire and ventilation tests FDS2 was back-approved against these information at CERN Validation exertion at CERN and somewhere else on FDS2 Large scale test, well illustrative of vast trial corridors Long passage test, well illustrative of Accelerator Tunnels CERN - European Organization for Nuclear Research

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FDS2 Validation Heiss-Dampf Reaktor Karlsruhe Gasoil 2-4 MW fire (Test T52) Propane 1 MW fire (Test T51) CERN - European Organization for Nuclear Research

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HDR Propane TEST T51 Data correlation ~5% ~11% FIRE room roof level layer Doorway roof level layer Doorway temperature profile FIRE room floor level layer ~15% ~ 100% CERN - European Organization for Nuclear Research

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HDR TEST T52 OIL 2 MW Data examination Fire room temperature ~27% More on the geometry O 2 ~ 8% Upper Hatch temperature Doorway temperature ~45% ~12% Doorway speed ~14% CERN - European Organization for Nuclear Research

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FDS2 MEMORIAL TUNNEL FIRE TEST VALIDATION The Memorial burrow test program has given a gigantic measure of crude information on street burrow fire 8m high Flight see inside passage Tests 850m long 8m extensive CERN - European Organization for Nuclear Research

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CASE T501: 20 MW Natural Ventilation – (Temperature) 16' from start TEMPERATURES OBSERVED : ~150-300F = 80-150C ~150-300F = 80-150C FDS2 RESULT CERN - European Organization for Nuclear Research

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Validation Overall Judgment The normal aftereffects of the FDS2 in various circumstances (*) is as per the following : Long term semi relentless Gas temperatures mistakes of the request of 20-30% of the D T Gas Concentration huge blunders, of ~ 1 request of greatness Velocity of drifters , like smoke layers drop and development blunders of the request of 40-60 %. (*) diverse circumstances : little room-little fire, little room-huge fire, high inlet little fire, high sound enormous fire, burrow fire, pre-flashover, post-flashover, poor ventilation, rich ventilation, and so forth… … !!!!!! CERN - European Organization for Nuclear Research

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Evacuation Simulation M. Study Evacuation reproduction codes: Simulex (I.E.S. Global) License 2500€/yr Exodus 3D Greenwich University (Fire Safety Group) License 5000 €/yr CERN - European Organization for Nuclear Research

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What we need to survey on flames : (proceeded) '… The development works must be composed and worked in a manner that in case of a flare-up of flame:.. … (d) tenants can leave the development works or be safeguarded … (e) the wellbeing of save groups is thought about Will inhabitants leave the structure before the smoke/fire produces untenable conditions? Dispatch gather point video CERN - European Organization for Nuclear Research

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Exodus Validation References The Validation of Evacuation Models. Creators: E Galea. CMS Press, Paper No. 97/IM/22, ISBN 1 899991 22 0, 1997 The EXODUS Evacuation Model Applied to Building Evacuation Scenarios. Creators: M Owen, E Galea, P Lawrence. Diary of Fire Protection Engineering 1996, Vol.8(2), pp 65-86 The Collection and Analysis of Pre-Evacuation Times from Evacuation Trials and their Application to Evacuation Modeling". Gwynne S, Galea E.R., Parke J, Hickson J. Fire Technology, Kluwer Associates, US, pp173-195, vol 39, number 2, 2003. CERN - European Organization for Nuclear Research

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APPLICATIONS AT CERN - European Organization for Nuclear Research

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The fire Parabolic inclining fire control 0 - > 5MW then enduring Two diverse development rates ( 5 MW in 700s , 1500s) Located in 3 distinctive position (base, beat, side) 6 unique runs for every each exploratory natural hollow CERN - European Organization for Nuclear Research

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ATLAS CERN - European Organization for Nuclear Research

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Atlas Fires Locations before one exit Under Detector Top of Detector CERN - European Organization for Nuclear Research

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ATLAS Videos ATLAS THE CONSTRUCTION OF THE MODEL2.avi ATLASLARGE.avi CERN - European Organization for Nuclear Research

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ATLAS Slices (Fire under det. 5Mw 300s) t=150 s Smoke fills upper level t=100 s t=200 s Smoke begins to drop on upper passages t=250-300s Smoke at level of upper ways out CERN - European Organization for Nuclear Research

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CMS CERN - European Organization for Nuclear Research

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Smoke advancement and transport inside the natural hollow CMS demonstrate grandstand CMS Fire Under Detector 5 MW CERN - European Organization for Nuclear Research

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Smoke layer position on the xz plane of the sinkhole 3 rd level corridor overflowed by smoke t=3' t=5' 1 st level path overwhelmed by smoke 2 rd level passage overflowed by smoke t=7' t=6' CERN - European Organization for Nuclear Research

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Evacuation displaying 130 individuals in ATLAS 100 individuals in CMS Snapshots of the CMS Model Snapshot of the Atlas Evacuation Simulation CERN - European Organization for Nuclear Research

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Results Overview ATLAS: Smoke spread to leave level passages: 300s (medium proliferation) to 480s (direct engendering) Evacuation Time: [120s for discovery] + 90to160s= 210s to 280s Evacuation Validated CERN - European Organization for Nuclear Research

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Results Overview CMS ATLAS: Smoke spread to leave level paths: 250s (medium spread) to 360s (direct spread) Evacuation Time: [120s for discovery] +85 to 110s= 205 to 230s Evacuation Validated CERN - European Organization for Nuclear Research

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Conclusions CFD and clearing reenactment devices permitted recreation and contemplated approval of complex and non standard geometries The discoveries demonstrate that the hole amongst departure and smoke proliferation is not high Several measures must be set up keeping in mind the end goal to limit postponements and challenges if there should be an occurrence of crisis … (yet this is independent from anyone else an alternate and colossal subject) CERN - European Organization for Nuclear Research

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