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采用控制容积法和界面调和平均导热系数以及图形处理方法,对典型非均匀多孔介质S i-erpinski地毯中的导热过程进行分析与模拟计算.结果表明:实际多孔介质中温度与热流分布是不均匀和不连续的,内部结构是影响温度分布和热量传递的主要因素,其影响程度与骨架和孔隙的导热系数、孔隙的大小和分布有关;温度梯度在孔隙中明显变大与孔隙处导热系数很小相对应;热流在孔隙和骨架交界处的局部区域中明显变大,尤其是在方形孔隙的角部出现热流峰值,这与温度发生突变的位置点相对应.研究结果可以推广到更为复杂的非均匀多孔介质的场合,可以进一步认识非均匀多孔介质中的导热规律,为工程计算提供更精确的计算方法.
The heat transfer process in S i-erpinski carpet, a typical non-uniform porous medium, is analyzed and simulated by the control volume method and the interface harmonic mean thermal conductivity and the graphic processing method.The results show that the distribution of temperature and heat flux in the actual porous media is uneven And discontinuity, the internal structure is the main factor that influences the temperature distribution and the heat transfer. The degree of influence is related to the thermal conductivity of the framework and the pores, the size and distribution of the pores. The temperature gradient obviously increases in the pores and the thermal conductivity in the pores is very large The heat flux obviously increases in the local area of the interface between the pore and skeleton, especially the peak of heat flow in the corner of the square pore, which corresponds to the location where the temperature changes suddenly.The research results can be generalized to more complex Of non-uniform porous media occasions, you can further understand the heterogeneity of porous media in the law of heat for engineering calculations to provide a more accurate method of calculation.