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基于不可逆热力学,建立了室内气体污染物浓度分布特性对交叉扩散水平与特征的影响关系式,并结合室内实际的温度水平和湿度水平,对气体污染物浓度分布影响下的交叉扩散特征与水平进行了讨论。结果表明:当污染气体组分梯度与扩散附加扩散系数正负相同时,交叉扩散作用所形成的温度梯度和水蒸气组分梯度小于零,反之则两种梯度大于零。而且,在相同的污染气体组分梯度和扩散附加扩散作用下,室内初始温度和湿度水平越高,所形成的温度和水蒸气组分梯度的绝对值越大;但初始温度水平的影响有限,而初始湿度水平的影响具有显著性。
Based on the irreversible thermodynamics, the relationship between the indoor air pollutant concentration distribution and cross-diffusion was established. Combined with the actual indoor temperature and humidity levels, the characteristics and levels of cross-diffusion under the influence of gas pollutant concentration distribution Discuss. The results show that the temperature gradients and water vapor fraction gradients formed by cross diffusion are less than zero when the gradient of contaminated gas components and positive and negative diffusion diffusion coefficients are the same, otherwise the two gradients are greater than zero. Moreover, under the same gradient of contaminated gas components and additional diffusion of diffusion, the higher the initial indoor temperature and humidity levels, the greater the absolute value of the temperature gradient and the composition of the water vapor components. However, the initial temperature level has a limited impact, The effect of initial humidity level is significant.