Modeling And Simulation Research On Temperature Field Of Skin Subjected To Thermal Damage

As the body’s outer protective barrier, the skin is the tissue outside the muscle of the body surface. And it is also the biggest tissue of the body. As the skin is covered over the whole body, the phenomenon of skin burns is a very common human external injury accident. According to the principles causing to skin burns, it can be divided into thermal burns, electric burns, chemical burns, radiation burns, etc. Among them, thermal burns account for eighty percent. Because the hot water scald easily happens in our daily life, it is very necessary to carry out the process in more depth. Accurate analysis of skin heat transfer process will facilitate rapid diagnosis and therapy of skin burns. Many scholars at home and abroad had adopted so many research methods to analyze the process. They usually adopted the numerical simulation methods, such as FDM, FEM, BME, and so on. The accuracy of the calculation results needs to be verified by further experiments on animals. So it is obliged to combine numerical simulation with the experimental method for more detailed research. The main contents and results are as follows :It introduced the heat transfer mechanism and models of the biological tissue in this paper. On the premise of reasonable hypothesis, the finite element model of the skin is established based on ANSYS using the finite element method in the dissertation. The model is applied by heat load to simulate the skin subjected to hot water in 100 degrees Celsius. It’s calculated to get the situation of temperature field distribution under the typical parameters of the skin and it’s found that after evacuating the heat source, the heat will continue to spread in the skin tissue and the heated region is expanding. That is to say, the hot action of the heat source to the skin tissue is a certain delay.Then the temperature measurement system is designed and built up under existing experiment conditions to verify the results of numerical calculation. The temperature sensor of the temperature measurement system is platinum resistor PT100. By comparing, it turned out that the temperature change trend of both theoretical and experimental is roughly the same, but the temperature change curves do not coincide. The error mainly comes from detection means and system, and it’s also may be caused by the complexity of the organism itself. It is clear that the accuracy of the numerical calculation model is dependent on the thermal physical parameters of the skin tissue. But the thermal parameters are changed over the process. So when using the numerical simulation method to calculate the skin temperature change, its complexity is a little simple and rough compared with thermal control mechanism of the organism itself. Nevertheless, the heat transfer numerical calculation still contributes to understand the process of skin burns and the temperature variation regularity, and it can provide a certain reference basis for the prediction of the thermal damage.It’s established the finite element model of the skin and analyzed the rule of heat transfer process in skin tissues subjected to hot water combined numerical simulation with the experimental method in this dissertation and it provides ideas for the researchers engaged in the related research in the future.