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Prediction of facial cooling while walking in cold wind
Peter Tikuisis1, Michel B Ducharme, Dragan Brajkovic
1Defence Research and Development Canada, Simulation, Modelling, Acquisition, Rehearsal, and Training, 1133 Sheppard Avenue West, P.O. Box 2000, Toronto, Ont., Canada M3M 3B9. Peter.Tikuisis@drdc-rddc.gc.ca
Abstract:
A dynamic model of cheek cooling has been modified to account for increased skin blood circulation of individuals walking in cold wind. This was achieved by modelling the cold-induced vasodilation response to cold as a varying blood perfusion term, which provided a source of convective heat to the skin tissues of the model. Physiologically-valid blood perfusion was fitted to replicate the cheek skin temperature responses of 12 individuals experimentally exposed to air temperatures from -10 to 10 degrees C at wind speeds from 2 to 8 ms(-1). Resultant cheek skin temperatures met goodness-of-fit criteria and implications on wind chill predictions are discussed.
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