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Thermal properties in unsaturated porous textiles with phase change materials （PCM）

Thermal properties in unsaturated porous textiles with phase...

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第十八届全国水动力学研讨会

作者： Zhu Qing-yong (School of Mathematics and Computational Science, Zhongshan University, Guangzhou 510275,China)

＜正＞In this paper a fractal model for the pore size distribution of unsaturated porous textiles with grains of PCM is developed. On the basis of the finite volume method the thermal buffering effect of PCM is simulated. The distributions of the temperature, moisture concentration in the porous textiles with PCM were numerically computed by this technique. For the comparison the distributions of the temperature, moisture concentration in the porous textiles without PCM were also numerically computed. A series of experiments measuring fabric surface temperature with PCM were conducted to validate the model and reasonable agreement is observed between the predictions and the measurements. The results indicate that this model is satisfactory.

关键词： fractal model PCM porous textiles numerical simulation

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An Improved Finite Difference Scheme for Solving the Equation of Filtration Type in porous textiles with Phase Change Materials

An Improved Finite Difference Scheme for Solving the Equatio...

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2007国际计算力学研讨会

作者： Q.Y.Zhu~(1 2*) 1 Ocean Engineering Research Center School of Engineering Zhongshan University Guangzhou 510275 China 2 Guangdong Province Key Laboratory of Coastal Ocean Engineering Zhongshan University Guangzhou 510275 China Ocean Engineering Research Center School of EngineeringZhongshan UniversityGuangzhou510275China Guangdong Province Key Laboratory of Coastal Ocean Engineering Zhongshan University Guangzhou 510275 China

＜正＞In this paper an improved finite difference scheme is investigated to solve the equation of filtration type in porous textiles with phase change materials（PCM）,which can be expressed as a nonlinear source term. Due to the effects of source term,the constructed scheme is total variation bounded（TVB）.On the basis of this scheme thermal buffering effect of PCM is *** distributions of the temperature,saturated degree in the porous media with PCM were numerically computed by this *** the comparison the distributions of the temperature,saturated degree in the porous media without PCM were also numerically *** results indicate that this method is satisfactory.

关键词： improved finite difference scheme porous textiles phase change material

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