DHS Scholars Internship Fire Research Division

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DHS Scholars Internship Fire Research Division

• Tony Le, Drexel University
• Advisor Dr. Glenn Forney, NIST
• August 13th, 2007

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Fire Dynamics Simulator (FDS)

• Command line based computational fluid dynamics
  model of fire-driven fluid flow
• Based on Navier-Stokes equations for low-speed,
  thermally-driven flow
• Emphasis on smoke and heat transport from fires
• First created in February 2000

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Computational Fluid Dynamics

• Field Model
• Divide into small volumes
• Partial differential equations

• Zone Fire Model
• Divide into two zones
• Ordinary differential equation

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• Simulation Clip

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Features of FDS

• Hydrodynamic Model - Navier-Stokes
• Turbulence treated by Smagorinsky form of Large
  Eddy Simulation (LES)
• Combustion Model single step chemical reaction
  tracked via a two-parameter mixture fraction
  model
• Radiation Transport finite volume methods for
  convective transport

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Features of FDS (cont.)

• Geometry approximated governing equations of a
  rectilinear mesh
• Multiple Meshes numerous rectangular meshes
  used for calculations
• Parallel Processing numerous computers using
  Message Passing Interface (MPI)
• Boundary Conditions solid surfaces are assigned
  thermal boundary conditions

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Linux Fire Cluster

• Current System
• PERL Script
• Current Load
• Temperature
• Usage
• User
• Cumulative
• System Status

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Nagios Network Monitoring

• New System
• Notifications
• E-mail
• SMS (Text Msgs)
• Temperature
• System Status
• Interactive
• Plug-ins
• Web-Based Services

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FDS Graphical User Interface (GUI)

• Ruby WxRuby

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SmokeView (SMV)

• Visualize numerical predictions generated by FDS
• Displays time-dependent
• Traces particle flow
• Animated contour slices of computed gas variables
  and surface data

• Simulation Clip

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SmokeView - OpenGL

• Simulation Clip

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3D Smoke Animated Isosurfaces

• Simulation Clip

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Particle Animation

• Simulation Clip

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Temperature Slices

• Simulation Clip

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Boundary Temperature

• Simulation Clip

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Validation

• Simulation Clip

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Real World Models
2006 Olympic Ice Hockey Stadium, Turin, Italy,
Courtesy of Arup
Tank Fire Analysis Combustion Science and
Engineering
NASA Vehicle Assembly Building Kennedy Space
Center courtesy Rolf Jensen
Parking Garage, Courtesy of VTT, Finland
PyroSim, courtesy Thunderhead Engineering
Consultants, Manhattan, Kansas
Courtesy, Schirmer Engineering
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World Trade Center InvestigationKevin McGrattan,
Chuck Bouldin, Glenn Forney

• Simulation Clip

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College Dorm Fire
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Questions?
http//fire.nist.gov/fds/ http//www.pages.drexel.
edu/ttl28