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International Heat Transfer Conference 15

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Heat Transfer Analysis in Human Skin Subjected to Flash Fire: Investigation of Dual Phase Lag Phenomenon

Uday Raj
Department of Mechanical Engineering,Indian Institute of Technology Delhi

Prabal Talukdar
Institute of Textile & Clothing

Apurba Das
Department of Textile Technology, Indian Institute of Technology Delhi, New Delhi-110016, India

Ramasamy Alagirusamy
Department of Textile Technology, Indian Institute of Technology Delhi, New Delhi-110016, India

DOI: 10.1615/IHTC15.cnd.009253
pages 1556-1570


KEY WORDS: Conduction, Thermophysical properties, Thermal protective performance, Non-Fourier heat conduction, Second degree burn, Flash fire

Abstract

Modeling of heat transfer is carried out using non-Fourier approach to analyze heat transfer through the skin layer and to predict the second degree burn time using measured heat flux of literature. One dimensional temperature distributions across various skin layers are obtained numerically for two different air gaps (6.4 mm and 19.1 mm) using Dual Phase Lag Model of Bio-heat Transfer (DPLMBT). Second degree burn time is obtained using Henriques’ burn integral relation. Wave phenomenon is observed inside human skin. Present findings of second degree burn time are compared with previous experimental results where Stoll's criterion was applied. It is concluded that present results are more realistic compared to the prediction using Stoll's criterion. It is recommended to use DPLMBT to analyze heat transfer inside human skin subjected to such small duration of high level heat flux exposure. Later, effects of blood perfusion rate, heat flux and temperature gradient phase lag durations on second degree burn time are discussed. It is observed that effect of considering blood perfusion rate is significant in second degree burn predictions when τtq approaches towards thermal wave model (τtq ≈ 0.0).

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