[Finite-element simulation of solar radiation impact on corpse's cooling].

Q4 Medicine

Sudebno-Meditsinskaya Ekspertisa Pub Date : 2025-01-01 DOI:10.17116/sudmed20256802131

G V Nedugov

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引用次数: 0

Abstract

Objective: To find out the regularities of solar radiation impact on the corpse's temperature field by means of a finite-element simulation of this physical process.

Material and methods: A finite-element simulation of the temperature field of the corpse's head was performed using the ELCUT 6.5 application.

Results: A two-dimensional finite-element model of finding the postmortem temperature field of the head under conditions of convective heat exchange with and without solar radiation, considering the cyclical dynamics of the external temperature and surface density of the heat flow, as well as the presence of shadow zone on the corpse, has been developed. It has been proven during simulation that solar radiation, depending on the heat flow density and the integral sum of absorbed thermal radiation, is accompanied by a proportional heating of the corpse's superficial tissues on the insolation side with delayed change in the temperature gradients' directions and asymmetric temperature field formation. Diffused solar radiation is enough for change of the corpse's cooling dynamics even if its location is not under direct sunlight.

Conclusion: It is recommended to use the finite-element simulation of corpse's cooling in determining the age of death under conditions of combined postmortem heat exchange with the presence of solar radiation.

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[太阳辐射对尸体降温影响的有限元模拟]

目的：通过对人体温度场物理过程的有限元模拟，探讨太阳辐射对人体温度场的影响规律。材料与方法：采用ELCUT 6.5软件对尸体头部温度场进行有限元模拟。结果：建立了考虑外部温度和热流表面密度的周期性动力学以及尸体上阴影区存在的有和无太阳辐射对流换热条件下头部死后温度场的二维有限元模型。模拟结果表明，太阳辐射随热流密度和吸收热辐射的积分和的变化，伴随着尸体受热侧表面组织的成比例加热，温度梯度方向变化延迟，温度场形成不对称。太阳辐射的扩散足以改变尸体的冷却动力学，即使它的位置不是在阳光直射下。结论：在死后热交换和太阳辐射联合作用下，建议采用尸体冷却的有限元模拟来确定死亡年龄。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sudebno-Meditsinskaya Ekspertisa Medicine-Pathology and Forensic Medicine

CiteScore

0.60

自引率

0.00%

发文量

期刊介绍： The journal is concerned with the theory and practice of forensic medicine - the problems of thanatology, traumatology, toxicology, serology, forensic obstetrics, forensic dentistry, forensic psychiatry, forensic chemistry, physicotechnical methods of investigation, history of forensic medicine and some problems of criminology and legal laws related to forensic medicine. It publishes original studies by Russian authors, casuistry surveys, abstracts and reviews of Russian and foreign literature, scientific information, reports on scientific conferences.