冷环境下手指温度分布的数值模拟

Numerical Analysis of Finger Temperature Distribution in a Cold Environment

目的探讨在冷环境下手指温度分布特点 ,为手的热防护提供基础。方法建立人体和手的热调节数学模型 ,在人体分为 1 5节段的基础上 ,将手进一步细分为手掌和 5个手指 ,根据生物热方程利用有限元方法进行数值模拟。结果冷环境下 ,风速对手指的温度影响很大 ,而来流动脉血液温度对手指温度影响不明显。结论通过与已有文献的比较 ,表明了模型的建立是合理的 。

Objective Temperature distribution over the finger was discussed, so as to provide reference for thermal protection of the hand. Method Mathematical model for thermoregulation of trunk including hands was established. In the model, the trunk was divided into 15 segments and the hand was divided into palm and 5 fingers. The model was presented as a consistent set of bio heat equations and was solved by a finite element method. Result Effect of wind speed on the finger temperature is so evident, while the effect of artery blood temperature on the finger temperature is so little. Conclusion Through the comparison with the result of literature,the establishment of the model was proved to be reasonable and the method feasible.