Dynamic Model of Facial Cooling

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Authors
  1. Tikuisis, P.
  2. Osczevski, R.J.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN)
Abstract
Recent modifications to windchill forecasting have motivated the development of a rate-of-tissue-cooling model for the purpose of predicting facial cooling times. The model assumes a hollow cylindrical geometry with a fixed internal boundary temperature and adherence to the dimensions and tissue thermal properties of the cheek. Convective and radiative heat exchanges at the skin surface are also taken into account. The explicit finite-difference solution of the thermal conduction problem was applied to predict the transient temperature profile in the cheek model, composed of 25 concentric annual compartments with equally spaced nodes. Model predicitons compare favorably to reported incidents of facial frostbite and to several laboratory studies on facial cooling. A sensitivity analysis demonstrates the effect of varying the values of tissue thermal resistance and cheek dimensions on the predicted facial cooling rate.
Keywords
Facial cooling;Face cooling
Report Number
DRDC-TORONTO-SL-2002-002 — Scientific Literature
Date of publication
01 Dec 2002
Number of Pages
6
Reprinted from
Journal of Applied Meteorology, vol 41, 2001, p 1241-1246
DSTKIM No
CA021779
CANDIS No
518502
Format(s):
Hardcopy

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