Analytical expressions for estimating endurance time and glove thermal resistance related to human finger in cold conditions |
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| Institution: | 1. Department of Mechanical Engineering, Isfahan University of Technology, Isfahan 84156 83111, Iran;2. Foolad Institute of Technology, Fooladshahr, Isfahan 84916 63763, Iran;1. Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, PR China;2. Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, PR China;3. Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, PR China;1. Center for Environmental Studies, Virginia Commonwealth University, Richmond, VA 23284, USA;2. Department of Biology, Virginia Commonwealth University, Richmond, VA 23284, USA;1. School of Architecture, Harbin Institute of Technology, Harbin, 150000, China;2. Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin, 150000, China |
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| Abstract: | Frostbite is considered the severest form of cold injury and can lead to necrosis and loss of peripheral appendages. Therefore, prediction of endurance time of limb's tissue in cold condition is not only necessary but also crucial to estimate cold injury intensity and to choose appropriate clothing. According to the previous work which applied a 3-D thermal model for human finger to analyze cold stress, in this study, an expression is presented for endurance time in cold conditions to prevent cold injury. A formula is also recommended to select a proper glove with specific thermal resistance based on the ambient situation and cold exposure time. By employing linear extrapolation and real physical conditions, the proposed formulas were drawn out from numerical simulation. Analytical results show good agreement with numerical data. The used numerical data had been also validated with experimental data existed in the literature. Furthermore, the effect of different parameters such as glove thermal resistance and ambient temperature is investigated analytically. |
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| Keywords: | Frostbite Finger Analytical expression Cold conditions |
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