Luchakov Iu I, Nozdrachev A D
Izv Akad Nauk Ser Biol. 2009 Jan-Feb(1):64-9.
The processes of heat transfer in a human body were studied with the use of a mathematical model. It has been shown that only conductive or only convective heat transfer may occur in different body areas. The rate of blood-mediated heat transfer in the presence of blood circulation is many times higher than heat transfer due to temperature gradient; therefore, the convective process prevails over the conductive process. The body core contains a variety of blood vessels, and the bulk of blood concentrates there in the norm. Hence, heat transfer in it is mainly convective. In surface tissues, where the rate of blood circulation is lower and the vasculature has certain specific features, heat transfer is mainly conductive. Hence, the core and surface tissues are absolutely different body zones in terms of heat transfer.
利用数学模型对人体中的热传递过程进行了研究。结果表明，在人体的不同部位可能分别发生仅传导或仅对流的热传递。在有血液循环的情况下，血液介导的热传递速率比因温度梯度引起的热传递速率高出许多倍；因此，对流过程比传导过程更为显著。人体核心部位有各种各样的血管，在正常情况下大部分血液集中在那里。因此，其中的热传递主要是对流。在表面组织中，血液循环速率较低且脉管系统有一定的特定特征，热传递主要是传导。因此，就热传递而言，核心组织和表面组织是人体完全不同的区域。
