从非平衡热力学理论出发，以广义热力学力作为传质过程驱动势，建立了描述多孔介质恒速干燥阶段外部对流传热传质过程的热力学理论模型，并进行了数值计算，计算值与已有的实验数据吻合较好；同时，还将计算结果与传统的理论进行了比较，结果表明，非平衡热力学理论更能反映过程的物理本质。
From the viewpoint of non-equilibrium thermodynamic theory,considering the generalized thermodynamic driving force X whichis (-/T) as the driving potential of mass transfer,the non-equilibrium thermodynamic theory of the external heat and masstransfer during convective drying process in porous media was establishedand the numerical calculation was performed. The results show that theevaporation rate of surface water by theoretical calculation agrees wellwith experiments and the mean error is about 2%. At same time, thecomparison of present calculations with traditional theory results for massfraction and mass transfer potential illustrated that the non-equilibriumthermodynamic theory can rationallyexplain mass transfer processes of air and vapor insidethe boundary layer.
参考文献
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