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首页> 外文期刊>International Journal of Heat and Mass Transfer >Investigation on heat and mass transfer in hygroscopic random charged fiber webs
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Investigation on heat and mass transfer in hygroscopic random charged fiber webs

机译：吸湿随机带电纤维网的传热传质研究

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摘要

Hygroscopic charged fiber webs include a large number of interconnected capillaries formed by randomly distributed pores. The simultaneous heat and mass transfer in hygroscopic charged fiber webs is different from traditional flows in macro-channels resulted from the electrokinetic phenomena in micro-channels. In this paper, a mathematical model is presented with consideration of a quintic polynomial pore size distribution evaluated from a series of experiments and the electrokinetic phenomena resulting in a higher flow friction. The liquid diffusion coefficient in this model can be expressed as D_l(ε_l) = σcos ψsin~2β(r_(max)-r_(min)nε_l~(n-1)/(4μ(1+A-Θ)φ~(n-1)Γ_1Δ~4-Ω_1)/Γ_2Δ~4-Ω_2Δ~2)specification of initial and boundary conditions, the governing equations are solved numerically and distributions of the temperature, the moisture concentration, and liquid water content in hygroscopic fiber webs are obtained. The comparison with the experimental measurements shows the rationality of this model in simulating the coupled heat and mass transfer in hygroscopic charged fiber webs with consideration of the electrokinetic phenomena.
机译：吸湿带电纤维网包括大量由随机分布的孔形成的相互连接的毛细管。吸湿带电纤维网中的传热和传质同时不同于宏通道中的传统流动，这是由微通道中的电动现象引起的。本文提出了一种数学模型，其中考虑了通过一系列实验评估的五次多项式孔径分布以及导致较高流动摩擦的电动现象。该模型中的液体扩散系数可以表示为D_l（ε_l）=σcosψsin〜2β（r_（max）-r_（min）nε_l〜（n-1）/（4μ（1 +A-Θ）φ〜（初始条件和边界条件的n-1）Γ_1Δ〜4-Ω_1）/Γ_2Δ〜4-Ω_2Δ〜2）规范，数值求解了控制方程，并确定了吸湿纤维网中的温度，水分浓度和液态水含量的分布获得。与实验测量结果的比较表明，该模型在考虑电动现象的情况下模拟吸湿带电纤维网中传热和传质耦合的合理性。

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