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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical simulation of the transient heat and liquid moisture transfer through porous textiles with consideration of electric double layer
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Numerical simulation of the transient heat and liquid moisture transfer through porous textiles with consideration of electric double layer

机译：考虑双电层的多孔纺织品瞬态传热和水分传递的数值模拟

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摘要

The liquid water transport coupled with moisture and heat transfer through porous textiles is a complicated process involving simultaneous, coupled heat and mass transfers. The flows in porous textiles are different from the traditional flows transfer in porous media due to the adsorption of moisture by fibers. Based on the Poisson-Boltzmann equation for electric double layers and Navier-Stokes equation for liquid flows, a mathematical model for describing resistance effects of electric double layer (EDL) on the coupled heat and liquid moisture transfer in porous textiles is developed. The resistance effect of the EDL in porous textiles can be measured by a dimensionless number, which is called electric resistance number. It is proportional to the square of the liquid dielectric constant, the solid surface zeta potential and inversely proportional to the liquid dynamic viscosity, electric conductivity and the square of the effective pore size. With specification of initial and boundary conditions, the distributions of the temperature, moisture concentration, and liquid water content in porous textiles have been obtained. The theoretical predictions are compared with experimental data, and good agreement is observed between the two, indicating that the heat and mass transfer process are influenced by the EDL in porous textiles.
机译：液态水的传输以及水分和通过多孔纺织品的热传递是一个复杂的过程，涉及同时，耦合的热和质量传递。由于纤维对水分的吸附，多孔纺织品中的流动与多孔介质中的传统流动传递不同。基于双电层的Poisson-Boltzmann方程和液体流动的Navier-Stokes方程，建立了一个数学模型来描述双电层（EDL）对多孔纺织品中传热和液体水分耦合传递的阻力作用。 EDL在多孔织物中的电阻效应可以通过无因次数来衡量，该数被称为电阻数。它与液体介电常数，固体表面ζ电势的平方成正比，与液体动态粘度，电导率和有效孔径的平方成反比。通过指定初始条件和边界条件，可以获得多孔纺织品中温度，水分浓度和液态水含量的分布。将理论预测值与实验数据进行了比较，两者之间观察到了很好的一致性，表明热量和传质过程受多孔纺织品中EDL的影响。

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