Advances,shortcomings, and recommendations for wind chill estimation |
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Authors: | Avraham Shitzer Peter Tikuisis |
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Institution: | (1) Mechanical Engineering Faculty, Technion, Israel Institute of Technology, 3200 Technion City, Haifa, Israel;(2) Adversarial Intent Section, Defence Research and Development Canada (DRDC), 1133 Sheppard Avenue West, P.O. Box 2000, Toronto, ON, M3M 3B9, Canada |
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Abstract: | This article discusses briefly the advances made and the remaining short-comings in the "new" wind chill charts adopted in
the US and Canada in 2001. A number of indicated refinements are proposed, including the use of whole body models in the computations,
verification of heat exchange coefficients by human experiments, reconsideration of "calm" wind conditions, reconsideration
of frostbite threshold levels, the inclusion of cold-related pain and numbness in the charts, etc. A dynamic numerical model
is applied to compare the effects of wind speeds, on the one hand, and air temperatures, on the other, on the steady-state
exposed facial and bare finger temperatures. An apparent asymmetry is demonstrated, favoring the effects of wind speeds over
those of air temperatures for an identical final facial temperature. This asymmetry is reversed, however, when SI unit changes
in these quantities are considered. |
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Keywords: | |
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