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Performance analysis of a heat transfer and sub-grid chemical reaction distributed activation energy model for fire simulations

Bhargava, Abhishek LU ; Van Hees, Patrick LU ; Husted, Bjarne LU ; Junior, Antonio Rodolfo and Neumeister, Corina (2019) In Journal of Fire Sciences 37(1). p.18-46
Abstract

A heat transfer and sub-grid chemical reaction kinetic model for solid phase combustion of a charring polymer is presented based on distributed reactivity modeling approach. The model is used to compute flammability parameters of a polymer sheet of a given thickness to simulate test results of a cone calorimeter experiment. Comparison of model simulations with cone calorimeter test data shows that it gives reasonable prediction of mass loss rate, heat release rate, and total heat released of poly-vinyl chloride (PVC) and ethyl vinyl acetate–aluminum tri-hydroxide (EVA-ATH). The solution of governing equations with the current form of distributed reactivity modeling model poses numerical challenges due to appearance of a double integral... (More)

A heat transfer and sub-grid chemical reaction kinetic model for solid phase combustion of a charring polymer is presented based on distributed reactivity modeling approach. The model is used to compute flammability parameters of a polymer sheet of a given thickness to simulate test results of a cone calorimeter experiment. Comparison of model simulations with cone calorimeter test data shows that it gives reasonable prediction of mass loss rate, heat release rate, and total heat released of poly-vinyl chloride (PVC) and ethyl vinyl acetate–aluminum tri-hydroxide (EVA-ATH). The solution of governing equations with the current form of distributed reactivity modeling model poses numerical challenges due to appearance of a double integral in the chemical reaction model. Hence, an analytical approximation has been derived to solve mass and energy conservation equations representing the model. Simulation results indicate that with the approximated form of the distributed reactivity modeling model, along with the input parameters retrieved from literature, the model shows comparatively good predictions for EVA-ATH for mass loss rate, heat release rate, and total heat released, but calculates under-predicted values for PVC.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
distributed activation energy model, EVA-ATH, mass loss rate, Polymer flammability, PVC, Pyrolysis
in
Journal of Fire Sciences
volume
37
issue
1
pages
18 - 46
publisher
SAGE Publications
external identifiers
  • scopus:85059346598
ISSN
0734-9041
DOI
10.1177/0734904118808009
language
English
LU publication?
yes
id
b74b5106-e80f-42bd-b6f4-b5d1b87173e2
date added to LUP
2019-01-17 08:08:43
date last changed
2020-01-13 01:22:08
@article{b74b5106-e80f-42bd-b6f4-b5d1b87173e2,
  abstract     = {<p>A heat transfer and sub-grid chemical reaction kinetic model for solid phase combustion of a charring polymer is presented based on distributed reactivity modeling approach. The model is used to compute flammability parameters of a polymer sheet of a given thickness to simulate test results of a cone calorimeter experiment. Comparison of model simulations with cone calorimeter test data shows that it gives reasonable prediction of mass loss rate, heat release rate, and total heat released of poly-vinyl chloride (PVC) and ethyl vinyl acetate–aluminum tri-hydroxide (EVA-ATH). The solution of governing equations with the current form of distributed reactivity modeling model poses numerical challenges due to appearance of a double integral in the chemical reaction model. Hence, an analytical approximation has been derived to solve mass and energy conservation equations representing the model. Simulation results indicate that with the approximated form of the distributed reactivity modeling model, along with the input parameters retrieved from literature, the model shows comparatively good predictions for EVA-ATH for mass loss rate, heat release rate, and total heat released, but calculates under-predicted values for PVC.</p>},
  author       = {Bhargava, Abhishek and Van Hees, Patrick and Husted, Bjarne and Junior, Antonio Rodolfo and Neumeister, Corina},
  issn         = {0734-9041},
  language     = {eng},
  number       = {1},
  pages        = {18--46},
  publisher    = {SAGE Publications},
  series       = {Journal of Fire Sciences},
  title        = {Performance analysis of a heat transfer and sub-grid chemical reaction distributed activation energy model for fire simulations},
  url          = {http://dx.doi.org/10.1177/0734904118808009},
  doi          = {10.1177/0734904118808009},
  volume       = {37},
  year         = {2019},
}