动物舌横断面温度场的实验研究与数值计算

Experimental Study and Numerical Calculation on Cross-sectional Temperature Fields of Animal's Tongue

结合中医舌诊机理对舌体进行了生物传热研究。直接测定了犬舌血液灌注等参数 ,研究了血液灌注率、动脉血液温度、血管截面积和位置分布对舌横断面温度场的影响 ,并用有限元法计算出舌体不同横断面的二维温度场。结果表明 ,在不同血液灌注率下 ,由于血管扩张或收缩 ,舌体内各血管截面积及位置分布不同 ,断面温度场主要受动脉血管大小和位置的影响。得出的结果有助于分析舌体的生物传热特性。用此研究方法可计算出不同血液灌注率以及考虑到静脉血管影响时的任一舌断面温度场 ,探明舌表面温度场和横断面温度场之间的关系 ,为深入研究舌体生物传热机理和三维温度场的计算提供依据。

Bio-heat transfer in the tongue body is studied combining the mechanism of tongue inspection in Traditional Chinese Medicine. Parameters such as the temperature of lingual surface, the blood perfusion of the dog's tongue and so on are measured and the influences of the blood perfusion, the arterial blood temperature, the arterial cross-sectional areas and positions on the temperature distribution in the cross-sections are studied. Then the two-dimensional temperature fields in different cross-sections are numerically solved by the finite element method (FEM). The results show that the vascular cross-sectional areas vary with the elasticity change of the vessel walls resulting from the variation of the blood perfusion. And the temperature distribution in the cross-section mainly depends on the arterial cross-sectional areas and positions. The results can help to analyze the bio-heat transfer characteristic of the tongue. According to this method, the sectional temperature fields in whatever place of the tongue can be calculated under different blood perfusion and on the condition that the influence of the venous blood temperature on the temperature field of the tongue is considered. We can further probe into the relationship between the temperature fields of the lingual surface and that of cross-sections. This can provide the foundation for further investigation into the bio-heat transfer mechanism and the calculation on three-dimensional temperature fields of the tongue.