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首页> 外文期刊>International Journal of Heat and Mass Transfer >Flow and heat transfer in biological tissue due to electromagnetic near-field exposure effects
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Flow and heat transfer in biological tissue due to electromagnetic near-field exposure effects

机译：由于电磁近场暴露效应，生物组织中的流动和热传递

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摘要

Electromagnetic fields (EMF) have been a vital part of our daily life over the past decade. Therefore, people are continuously exposed to electromagnetic (EM) sources in their vicinity generated by electronic devices such as those emitted by Wi-Fi, mobile phones, portable wireless router and other wireless services. This study aims to investigate the SAR, fluid flow and heat transfer in biological tissue due to EM near-field exposure. In a tissue model, the effects of distance to an EMF source and tissue permeability on natural convection in the biological tissue are systematically investigated. The specific absorption rate (SAR), fluid flow and the temperature distributions in the tissue during exposure to EM fields are obtained by numerical simulation of EM wave propagation and heat transfer equations. The EM wave propagation is expressed mathematically by Maxwell's equations. The heat transfer model used in this study is developed based on bioheat model and porous media model. By using the porous media model, the distribution patterns of temperature are quite different from the bioheat model by the strong blood dissipation effect of the porous media model. The exposure distance significantly influences the SAR, velocity field and temperature distribution. Moreover, the tissue permeability also affects the temperature distribution patterns within the tissue. The obtained results may be of assistance in determining exposure limits for the power output of the wireless transmitter, and its distance from the human body. The results can also be used as a guideline to clinical practitioners in EM relates the interaction of the radiated waves with the human body.
机译：在过去的十年中，电磁场（EMF）一直是我们日常生活的重要组成部分。因此，人们不断受到附近由电子设备产生的电磁（EM）源的影响，这些电子设备包括Wi-Fi，移动电话，便携式无线路由器和其他无线服务发出的电子设备。这项研究旨在调查由于电磁近场暴露而引起的生物组织中的SAR，流体流动和传热。在组织模型中，系统地研究了距EMF源的距离和组织渗透性对生物组织中自然对流的影响。通过电磁波传播和传热方程的数值模拟，获得了暴露于电磁场期间组织中的比吸收率（SAR），流体流量和组织中的温度分布。电磁波的传播用麦克斯韦方程组数学表示。本研究中使用的传热模型是基于生物热模型和多孔介质模型开发的。通过使用多孔介质模型，由于多孔介质模型具有很强的耗血作用，因此温度的分布模式与生物热模型完全不同。曝光距离会显着影响SAR，速度场和温度分布。而且，组织渗透性也影响组织内的温度分布模式。所获得的结果可能有助于确定无线发射器的功率输出的暴露极限及其与人体的距离。该结果还可以用作EM中临床医生的指南，其中涉及辐射波与人体的相互作用。

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