Study on different finite difference methods at skin interface for burn prediction in protective clothing evaluation

Summary For protective clothing evaluation by using the flame engulfment method, a skin burn injury model is required to predict burn degree of the covered skin. By applying finite difference methods, 2 numerical methods are compared. One is based on equivalent heat intensity; the other is based on...

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Veröffentlicht in:Fire and materials Jg. 41; H. 8; S. 1027 - 1039
Hauptverfasser: Zhai, L., Camenzind, M., Li, J., Rossi, R. M.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Bognor Regis Wiley Subscription Services, Inc 01.12.2017
Schlagworte:
Burns
Data processing
Energy conservation
Energy conservation law
Equivalence
Finite difference method
Heat
Injuries
Interfaces
law of conservation of energy
Mathematical models
Measurement methods
Numerical analysis
Numerical methods
Protective clothing
protective clothing evaluation
Skin
skin burn injury
skin heat transfer
Skin injuries
Skin temperature
Temperature distribution
Thermal protection
ISSN:0308-0501, 1099-1018
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Zusammenfassung:Summary For protective clothing evaluation by using the flame engulfment method, a skin burn injury model is required to predict burn degree of the covered skin. By applying finite difference methods, 2 numerical methods are compared. One is based on equivalent heat intensity; the other is based on the law of conservation of energy. In this study, skin temperature rise is compared between these 2 methods by using homogeneous skin properties as well as the analytical solutions. Differences between these 2 methods in application of measured heat exposure tests data are also explored. The results show that assuming equivalent heat intensity at the skin layer interfaces overestimates severity of burn injury. Burn injury time is sensitive to the investigated numerical methods, especially for third‐degree burns. The differences of the 2 methods can be reduced by optimization of the grid size using the test cases described in ASTM F1930. A detailed description of requirements regarding applicable numerical methods in future revisions of the relevant standards is recommended. The finite difference model applied in this paper can act as an effective tool to predict temperature distribution in the skin as well as predict burn injury for evaluation of thermal protective clothing.
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ISSN:0308-0501
1099-1018
DOI:10.1002/fam.2444