Wind chill: Whole body vs. facial cooling

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Authors
  1. Osczevski, R.J.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
This report examines the question of whether wind chill should be calculated as an effect of exposed skin heat transfer or of whole body heat loss. Theory suggests that it is not possible to derive a useful index of wind chill based on heat transfer through normal outdoor winter clothing. A test is described that demonstrates that one proposed index. AT, which is based on a clothed, whole body model, does not consistently and uniquely correspond to levels of human sensation. That is, the same value of AT results from wind and temperature combination that produce different cold sensations. Refinements to the DCIEM Facial Cooling Model to include a variable internal thermal resistance, dependent on skin temperature, are described. This model of wind chill is based on cooling of the windward side of a cylinder. Any value of equivalent temperature calculated with this model corresponds to only a narrow range of thermal sensation.
Keywords
Face cooling;Thermal instrumented manikins;Facial cooling;Winter;Thermal boundary layer;Human physiology
Report Number
DCIEM-TR-2000-089 — Technical Report
Date of publication
01 Nov 2000
Number of Pages
26
DSTKIM No
CA010652
CANDIS No
514995
Format(s):
Hardcopy;Document Image stored on Optical Disk

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