Title: DHS Scholars Internship Fire Research Division
1DHS Scholars Internship Fire Research Division
- Tony Le, Drexel University
- Advisor Dr. Glenn Forney, NIST
- August 13th, 2007
2Fire 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
3Computational Fluid Dynamics
- Field Model
- Divide into small volumes
- Partial differential equations
- Zone Fire Model
- Divide into two zones
- Ordinary differential equation
4 5Features 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
6Features 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
7Linux Fire Cluster
- Current System
- PERL Script
- Current Load
- Temperature
- Usage
- User
- Cumulative
- System Status
8Nagios Network Monitoring
- New System
- Notifications
- E-mail
- SMS (Text Msgs)
- Temperature
- System Status
- Interactive
- Plug-ins
- Web-Based Services
9FDS Graphical User Interface (GUI)
10SmokeView (SMV)
- Visualize numerical predictions generated by FDS
- Displays time-dependent
- Traces particle flow
- Animated contour slices of computed gas variables
and surface data
11SmokeView - OpenGL
123D Smoke Animated Isosurfaces
13Particle Animation
14Temperature Slices
15Boundary Temperature
16Validation
17Real 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
18World Trade Center InvestigationKevin McGrattan,
Chuck Bouldin, Glenn Forney
19College Dorm Fire
20Questions?
http//fire.nist.gov/fds/ http//www.pages.drexel.
edu/ttl28