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Author: william pitts

Displaying records 11 to 20 of 116 records.
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11. Experimental Characterization of Helium Dispersion in a -Scale Two-Car Residential Garage (NIST TN 1694)
Series: Technical Note (NIST TN)
Report Number: 1694
Published: 3/29/2011
Authors: William M Pitts, Jiann C Yang, Marco G Fernandez
Abstract: A series of experiments are described in which helium was released at constant rates into a 1.5 m 1.5 m 0.75 m enclosure designed as a -scale model of a two car garage. The purpose was to provide reference data sets for testing and validating c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907864

12. A NUMERICAL STUDY OF THE RELEASE AND DISPERSION OF A BUOYANT GAS IN PARTIALLY CONFINED SPACES
Published: 3/4/2011
Authors: Kuldeep R Prasad, William M Pitts, Jiann C Yang
Abstract: Development of the hydrogen economy will require a better understanding of the potential for fires and explosions associated with the unintended release of hydrogen within a structure. The ability to predict the mixing and dispersion behavior of hydr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906120

13. High Pressure Release and Dispersion of Hydrogen in a Partially Enclosed Compartment
Published: 3/1/2011
Authors: Kuldeep R Prasad, Thomas George Cleary, William M Pitts, Jiann C Yang
Abstract: The study of compressed hydrogen release from high-pressure storage systems has practical application for hydrogen and fuel cell technologies. Such releases may occur either due to accidental damage to a storage tank or connecting piping, or direct ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906807

14. Vertical Release of Hydrogen in a Partially Enclosed Compartment : Role of Wind and Buoyancy
Published: 1/25/2011
Authors: Kuldeep R Prasad, William M Pitts, Jiann C Yang
Abstract: The natural and wind driven mixing and dispersion of hydrogen released in an accidental manner in a partially enclosed compartment with two vents is investigated using theoretical tools. A simple analytical model is constructed to predict the entra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905660

15. Effect of wind and buoyancy on hydrogen release and dispersion in a compartment with vents at multiple levels
Published: 11/30/2010
Authors: Kuldeep R Prasad, William M Pitts, Jiann C Yang
Abstract: The natural and forced mixing and dispersion of hydrogen released in an accidental manner in a partially enclosed compartment with vents at multiple heights is investigated using theoretical tools. The key to the analysis is determination of the po ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905165

16. Fire Spread and Growth on Flexible Polyurethane Foam
Published: 10/18/2009
Authors: William M Pitts, Gregory Hasapis, Patrick Macatangga
Abstract: A series of experiments designed to characterize fire spread and growth on flat samples of commercial non-fire-retarded flexible polyurethane foam have been performed. 1.2 m × 1.2 m square sections of foam were ignited along one edge, and the fire s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903983

17. Comparison of Methane and Propane Diffusion Flame Extinguishment by Thermal Agents An Experimental and Detailed Kinetic Modeling Study
Published: 5/17/2009
Authors: William M Pitts, Jiann C Yang, Rodney A Bryant, Linda G Blevins
Abstract: A combined computational and experimental study of methane and propane flames burning in air diluted with thermal agents is described. Detailed kinetic modeling of opposed-jet diffusion flames and experimental extinguishing volume fraction measureme ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902198

18. NUMERICAL SIMULATION OF FIRE SPREAD ON POLYURETHANE FOAM SLABS
Published: 3/17/2009
Authors: Kuldeep R Prasad, Roland Kramer, Nathan D Marsh, Marc R Nyden, Thomas J. Ohlemiller, William M Pitts, Mauro Zammarano
Abstract: The NIST Fire Dynamics Simulator (FDS) is used extensively by the fire protection engineer for performance based design and forensic analysis. The equations of motion describing the gas phase are relatively well known and the approximations in the va ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901154

19. Improved Understanding of Thermal Agent Fire Suppression Mechanisms from Detailed Chemical Kinetic Modeling with Idealized Surrogate Agents
Published: 8/4/2008
Author: William M Pitts
Abstract: Fire suppression agents that derive their entire effectiveness from physical processes are known as thermal agents. Thermal agents operate by lowering the flame temperature through dilution, heat absorption, and thermal diffusion. Two aspects of thes ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861563

20. Structural Fire Response and Probable Collapse Sequence of World Trade Center Building 7 (Volume 1). Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1-9) ***DRAFT for Public Comments***
Series: National Construction Safety Team Act Reports (NIST NCSTAR)
Report Number: 1-9
Published: 8/1/2008
Authors: Therese P McAllister, Richard George Gann, Jason D Averill, John L Gross, William L. Grosshandler, James R. Lawson, Kevin B McGrattan, William M Pitts, Kuldeep R Prasad, Fahim Sadek, Harold E. Nelson
Abstract: This is the primary technical report on the National Institute of Standards and Technology (NIST) investigation of the collapse of World Trade Center Building 7 (WTC 7), conducted under the National Construction Safety Team Act. The investigation obj ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909256



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