The IAFSS Working Group on Measurement and Computation of Fire Phenomena (the MaCFP Working Group)
Background and motivation
The general objective of the “IAFSS Working Group on Measurement and Computation of Fire Phenomena” (abbreviated as the “MaCFP Working Group”) is to establish a structured effort in the fire research community to make significant and systematic progress in fire modeling, based on a fundamental understanding of fire phenomena. This is to be achieved as a joint effort between experimentalists and modelers, identifying key research topics of interest as well as knowledge gaps, and thereby establishing a common framework for fire modeling research. The MaCFP Working Group is intended as an open, community-wide, international collaboration between fire scientists. It is also intended to become a regular series of workshops, with a first workshop scheduled as a pre-event to the 12th IAFSS Symposium in Lund, Sweden, in June 2017 (http://www.iafss.org/save-the-date-12th-iafss-symposium/) and with subsequent workshops held every two years. The MaCFP Working Group is endorsed and supported by the International Association for Fire Safety Science (IAFSS, http://www.iafss.org).
The MaCFP Working Group is modeled after the successful example of the TNF Workshop (http://www.sandia.gov/TNF/abstract.html) and is tailored to the needs of fire modeling. The TNF Workshop was established approximately twenty years ago in the combustion science community and has since then emerged as an exceptionally effective framework for the collaborative development and promotion of the field of turbulent combustion. The TNF Workshop offers: (1) a digital library of well-documented target flame experiments; (2) examples of comparisons between experimental measurements and simulation results; and (3) the active participation and support of the entire turbulent combustion scientific community in the data collection and analysis. The MaCFP Working Group aims to achieve similar benefits.
The MaCFP initiative was started following discussions that took place in February 2014 at the 11th IAFSS Symposium (http://www.iafss.org/symposium/11th-symposium/), in particular during a pre-Symposium workshop entitled “Benchmarking/Data Sharing” with the participation of Prof. Assaad Masri (University of Sydney, Australia, and co-founding member of the TNF Workshop) as guest speaker. These discussions led to the formation of a Task Group of fire researchers (both modelers and experimentalists) on the topic of the experimental validation of CFD-based fire models. The Task Group produced a white paper and subsequently received the endorsement of IAFSS in March 2015. This was followed by a planning meeting in May 2015 during which a list of target experimental databases was produced, deemed suitable for validation of fire models. This list brings structure and focus to the MaCFP effort for the coming 18 months and essentially defines the bulk of the program of the upcoming first MaCFP workshop.
The central objective of the MaCFP Working Group is to develop a fundamental understanding of fire phenomena and to advance predictive fire modeling. The strategy is based on the study of elementary academic problems and a gradual move towards complexity and realism by following a building block approach to model development. The new MaCFP workshop series is intended to be complementary to both the existing Verification and Validation guides developed in support of the FDS fire modeling software (https://pages.nist.gov/fds-
The specific objectives of the MaCFP Working Group are to:
- Develop a digital archive of well-documented fire experiments that can be used as targets for CFD model validation;
- Develop a digital archive of well-documented CFD-based numerical simulations corresponding to the selected target experiments;
- Develop protocols for detailed comparisons between computational results and experimental measurements;
- Identify key research topics and knowledge gaps in computational and experimental fire research;
- Develop best practices in both computational and experimental fire research (including quality control and quantification of uncertainties);
- Establish a network between fire researchers and provide a community-wide forum for discussion and exchange of information.
The initial list of target experiments identified by the MaCFP Working Group includes five categories:
- Category 1: Turbulent buoyant plumes;
- Category 2: Turbulent pool fires with gaseous fuel;
- Category 3: Turbulent pool fires with liquid fuel;
- Category 4: Turbulent wall fires;
- Category 5: Flame extinction.
These target experiments correspond to basic configurations (building blocks) with carefully-controlled conditions and quality instrumentation and diagnostics. They also correspond to available open databases. This list will be enhanced after the first workshop.
The MaCFP repository is hosted on GitHub (https://github.com/MaCFP) and is under development. The repository already contains or will soon contain:
- A description of each selected target experiment (organized according to the categories (1)-(5) mentioned above), including a description of the experimental configuration and a description of measured quantities and measurement uncertainties (if known);
- An electronic copy of experimental data organized in simple comma-delimited ASCII files;
- Protocols to perform comparisons between experimental data and simulation results based on (provided) MATLAB-based post-processing tools.
Furthermore, the repository is meant to host the contributions submitted by different modelers in preparation of the first MaCFP workshop. It will therefore also contain:
- An electronic copy of computational results submitted by researchers, also organized in simple comma-delimited ASCII files.
The repository was created and is managed by Dr. Randy McDermott (National Institute of Standards and Technology, USA).
June 2017 Workshop
The first MaCFP workshop will be organized immediately before the 12th IAFSS Symposium, on June 10-11 2017 (dates may be subject to change).
The organizing committee for the first MaCFP workshop is composed of:
- Alexander Brown (Sandia National Laboratories, USA)
- Michael Gollner (University of Maryland, USA)
- John Hewson (Sandia National Laboratories, USA)
- Andre Marshall (University of Maryland, USA)
- Randy McDermott (National Institute of Standards and Technology, USA)
- Bart Merci (Co-Chair) (Ghent University, Belgium)
- Jose Torero (Co-Chair) (University of Queensland, Australia)
- Arnaud Trouvé (Co-Chair) (University of Maryland, USA)
- Yi Wang (FM Global, USA)
- Beth Weckman (University of Waterloo, Canada)
The exact format of the workshop is yet to be determined but is likely to be a mix of poster/oral presentations by researchers, one or two plenary talks by invited keynote speakers and group/panel discussions, guided by plenary introductions and concluded by reports of main outcomes. It is intended to be centered on in-depth topical discussions. Proceedings will be edited and put online on the MaCFP website (http://www.iafss.org/macfp/). The proceedings are intended to review progress, summarize accomplishments of the workshop and provide guidance with clear objectives for the next workshop.
The target audience is the experimental and computational fire research community. The workshops will be open and participation will be encouraged by proper advertisement, for instance by publishing (beginning of 2016) a Letter to the Editor in reputable outlets like the IAFSS Newsletter, Fire Safety Journal and Fire Technology.
Condensed Phase Phenomena Subgroup Planning Meeting
Historically, the fire modeling community has organized into two distinct groups: those who study smoke and heat transport in the gas phase, and those who study thermal decomposition and pyrolysis in the condensed phase. Previous discussions of the MaCFP have focused on gas phase phenomena, but quantitatively predicting fire growth and development will require coupled modeling and simulation of both gas and condensed phase processes. To this end, following discussions in April of 2016, it was proposed that the MaCFP be expanded to include a subgroup dedicated to the predictive modeling of condensed phase phenomena. A committee was formed to produce a white paper and organize a planning meeting during the 2017 MaCFP workshop at 12th IAFSS Symposium.
The purpose of the newly formed Condensed Phase Phenomena subgroup is to facilitate data sharing and model development to improve computational predictions of thermal decomposition and pyrolysis in fire scenarios. Specific objectives of the subgroup are to:
- Develop standard data set formats for experimental data on pyrolysis;
- Develop requirements for data set quality and establishing a data review committee;
- Incorporate compliant data into the existing MaCFP data repository;
- Create a database of pyrolysis property sets;
- Develop minimum requirements for numerical pyrolysis models; and
- Organize of a pyrolysis modeling discussion group.
Further planning for the Condensed Phase Phenomena subgroup will be undertaken as part of the June 2017 MaCFP Workshop in Lund, Sweden. This first planning meeting will take place in the morning of June 11 (half day meeting is planned) and is open to all interested persons. The purpose of the meeting will be to clarify objectives and develop a list of target experiments to be discussed as part of the second MaCFP workshop in 2019. The format of the meeting will consist of talks by invited speakers followed by an open discussion time, and the proceedings will be published online with the proceedings of the gas phase MaCFP workshop.
The organizing committee of the Condensed Phase Phenomena subgroup is composed of:
Morgan Bruns (email@example.com, NIST, USA)
Thomas Rogaume (firstname.lastname@example.org, University of Poitiers, France)
Stanislav Stoliarov (email@example.com, University of Maryland, USA)
For more information on the work of the Condensed Phase Phenomena subgroup, or to get involved, please contact one of the members of the organizing committee.
Call for Participation
The MaCFP Working Group is inviting the members of the entire fire research community to participate in the first workshop. While the workshop topic is of direct interest to experimental and computational fire researchers, the workshop should also be of broad interest to the community at large. Registration to the June 2017 workshop will be fully open.
Members of the fire research community can participate in one or both of the following ways:
- From now until June 2017: participate in the planning of the workshop by interacting with the organizing committee and generating/contributing simulation results to be discussed at the workshop;
- June 10-11, 2017: attend and participate in the discussions at the workshop.
Important issues like membership to the organizing committee of the MaCFP Working Group and the selection of new target experiments for the second MaCFP workshop will also be discussed at the first workshop. Suggestions on these topics are also welcome anytime.
For more information and/or to take a first step to get involved, please contact one of the organizing committee Co-Chairs:
Bart Merci (firstname.lastname@example.org)
Jose Torero (email@example.com)
Arnaud Trouvé (firstname.lastname@example.org)
Initial MaCFP white paper (August 2014)
Call for Participation submitted to the Editors of the IAFSS Newsletter, Fire Safety Journal and Fire Technology publications (January 2016): coming soon
MaCFP repository on GitHub: https://github.com/MaCFP
Information on first MaCFP workshop: coming soon
Images shown in the top logo come from: a turbulent pool fire simulation (P.E. DesJardin, SUNY Buffalo), a turbulent pool fire (B. Weckman, University of Waterloo), oxidizer dilution quenching of a turbulent, methane line flame (J. White, E. Link, T. Myers, A. Marshall and P. Sunderland, University of Maryland), a turbulent pool fire simulation (B. Merci, U. Ghent), and a turbulent wall fire simulation (Y. Wang, FM Global).