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Publications

 Google Scholar Citations | Research Gate Profile | UC eScholarship Repository (Pre-Prints) | Reports, Articles and Theses | Dataset Repositry

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1.

Singh, A V; Gollner, M J

Steady and transient pyrolysis of a non-charring solid fuel under forced flow Journal Article

In: Proceedings of the Combustion Institute, vol. 36, no. 2, 2017, ISSN: 15407489.

Abstract | Links | BibTeX

@article{Singh2017,
title = {Steady and transient pyrolysis of a non-charring solid fuel under forced flow},
author = {A V Singh and M J Gollner},
doi = {10.1016/j.proci.2016.07.043},
issn = {15407489},
year = {2017},
date = {2017-01-01},
journal = {Proceedings of the Combustion Institute},
volume = {36},
number = {2},
abstract = {textcopyright 2016 by The Combustion Institute. Published by Elsevier Inc. In previous work, the Reynolds analogy was used to develop a theoretical expression that allowed for the estimation of local mass burning rates in steady laminar boundary layer diffusion flames established over liquid and solid fuels. This technique was used to elucidate the mechanisms responsible for pyrolysis of both solid and liquid fuels in forced and free convective environments. These previous studies, however, focused on steady results that occur early in the combustion process, before regression of the fuel surface begins to influence results. In this work, a thorough experimental investigation of steady and transient pyrolysis of clear cast Poly Methyl Methacrylate (PMMA) is presented using both local pyrolysis rates and heat feedback to the condensed fuel surface measured at different streamwise locations in a bench-scale wind tunnel. A functional form of the Nusselt number is derived that can be readily used to identify these steady and transient regimes of PMMA burning in the form of local convective heat transfer coefficients. At early times ( textless 150 s), a steady burning regime is identified where heat feedback properties are constant and the gas phase can be assumed to be in a steady state. At later times, a transient burning regime dominated by solid-phase effects occurs. Heat feedback from the flame and hence local mass loss rates measured at later times are transient in nature and do not correspond well with the steady state theoretical solution. Investigation under different forced-flow wind conditions reveals this transient phenomena most likely occurs due to both deformation of the surface of PMMA and solid-phase conduction into the fuel, which eventually influences the gas phase. The results presented will be useful for future modeling of transient solid-phase combustion, especially as it is applied to studies of flame spread.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

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textcopyright 2016 by The Combustion Institute. Published by Elsevier Inc. In previous work, the Reynolds analogy was used to develop a theoretical expression that allowed for the estimation of local mass burning rates in steady laminar boundary layer diffusion flames established over liquid and solid fuels. This technique was used to elucidate the mechanisms responsible for pyrolysis of both solid and liquid fuels in forced and free convective environments. These previous studies, however, focused on steady results that occur early in the combustion process, before regression of the fuel surface begins to influence results. In this work, a thorough experimental investigation of steady and transient pyrolysis of clear cast Poly Methyl Methacrylate (PMMA) is presented using both local pyrolysis rates and heat feedback to the condensed fuel surface measured at different streamwise locations in a bench-scale wind tunnel. A functional form of the Nusselt number is derived that can be readily used to identify these steady and transient regimes of PMMA burning in the form of local convective heat transfer coefficients. At early times ( textless 150 s), a steady burning regime is identified where heat feedback properties are constant and the gas phase can be assumed to be in a steady state. At later times, a transient burning regime dominated by solid-phase effects occurs. Heat feedback from the flame and hence local mass loss rates measured at later times are transient in nature and do not correspond well with the steady state theoretical solution. Investigation under different forced-flow wind conditions reveals this transient phenomena most likely occurs due to both deformation of the surface of PMMA and solid-phase conduction into the fuel, which eventually influences the gas phase. The results presented will be useful for future modeling of transient solid-phase combustion, especially as it is applied to studies of flame spread.

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  • doi:10.1016/j.proci.2016.07.043

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Magazine Articles

Pathways for Building Fire Spread in the Wildland Urban Interface
Gollner, M.J., Society of Fire Protection Engineers’ Emerging Trends Newsletter, Issue 101. 2015

Pathways for Building Fire Spread in the Wildland Urban Interface
Gollner, M.J., SFPE Emerging Trends Newsletter, Society of Fire Protection Engineers, August, 2015.

The Flammability of a Storage Commodity
Gollner, M.J., Fire Protection Engineering Magazine, Society of Fire Protection Engineers, April 2014.

Theses

Effect of Microgravity on the Development and Structure of Fire Whirls

Jones, Michael, M.S. Thesis, University of Maryland College Park, 2020

A STUDY OF INTERMITTENT CONVECTIVE HEATING OF FINE LIVE WILDLAND FUELS

Orcurto, Ashlynne R, M.S. Thesis, Univeristy of Maryland, College Park, 2020

Laboratory Studies on the Generation of Firebrands from Cylindrical Wooden Dowels
Caton, Sara, M.S. Thesis, University of Maryland, College Park, 2017

Thermal Characterization of Firebrand Piles
Hakes, Raquel Sara Pilar, M.S. Thesis, University of Maryland, College Park, 2017

The Structure of the Blue Whirl: A Soot-Free Reacting Vortex Phenomenon
Sriram Bharath Hariharan, M.S. Thesis, University of Maryland, College Park, 2017

Moisture Content Effects on Energy and Emissions Released During Combustion of Pyrophytic Vegetation
Nathaniel Andrew May, M.S. Thesis, University of Maryland, College Park, 2017
A Fundamental Study of Boundary Layer Diffusion Flames
Singh, Ajay. Ph.D. Thesis, University of Maryland, College Park, 2015.
In Situ Burning Alternatives
Cohen, Brian, M.S. Thesis, University of Maryland, College Park, 2014.
Flame Spread Through Wooden Dowels
Zhao, Zhao, M.S. Thesis, University of Maryland, College Park, 2014.
Upward Flame Spread over Discreet Fuels
Miller, Colin, M.S. Thesis, University of Maryland, College Park, 2014
Studying Wildland Fire Spread Using Stationary Burners
Gorham, D.J., M.S. Thesis, University of Maryland, College Park, 2014.
Transient Fire Load on Aluminum Ferries (PDF)
Hall, B. M.S. Thesis, University of Maryland, College Park, 2014.
Studies on Upward Flame Spread (PDF, Official Copy, Presentation)
Gollner, MJ. Ph.D. Dissertation, University of California, San Diego, 2012.
A Fundamental Approach to Storage Commodity Classification (PDF, Proquest, Presentation)
Gollner, M.J. M.S. Thesis, University of California, San Diego, 2010.

Reports

Literature Review on Spaceport Fire Safety (NFPA Site)
Erin Griffith, Alicea Fitzpatrick, Seth Lattner, Joseph Dowling, Michael J. Gollner

Towards Data-Driven Operational Wildfire Spread Modeling: A REPORT OF THE NSF-FUNDED WIFIRE WORKSHOP
Gollner, M.J. and Trouve, A., 2015.

Pathways for Building Fire Spread at the Wildland Urban Interface (NFPA Site)
Gollner, M.J., Hakes, R., Caton, S. and Kohler, K., Fire Protection Research Foundation, National Fire Protection Association, March, 2015.

Literature Review on Hybrid Fire Suppression Systems
Raia, P. and Gollner, M.J., Fire Protection Research Foundation, National Fire Protection Association, May 2014.

Fire Safety Design and Sustainable Buildings: Challenges and Opportunities: Report of a National Symposium
Gollner, M.J., Kimball, A. and Vecchiarelli, T., Fire Protection Research Foundation, National Fire Protection Association, 2013.

Copyright Notes

In following copyright law, most journals allow their authors to share post-prints of their journal articles (essentially pre-prints with changes from the review process but lacking any publisher modifications or typesetting). Therefore, I have posted PDF Post-Prints of most journal articles in addition to document object identifier (DOI) links to the articles on the publishers site (sometimes requiring subscription). For more information about journal copyrights, please visit http://www.sherpa.ac.uk/romeo/. I have posted some conference proceedings on Research Gate. If you do not have access to a final article version, please contact me.

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