Isothermal moisture flow in building materials: modelling, measurements and calculations based on Kirchhoff’s potential

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• 作者：Arfvidsson ; Jesper ; Claesson ; Johan
• 刊名：Building and Environment
• 出版年：2000
• 出版时间：August 1, 2000
• 年：2000
• 卷：35
• 期：6
• 页码：519-536
• 全文大小：656 K

文摘

The modelling of non-linear, isothermal moisture flow in porous media without hysteresis is considered. Different formulations based on different potentials for the Fickian moisture flow are compared. Kirchhoff’s flow potential, i.e. the integral of any state-dependent moisture flow coefficient, is introduced. The problem with a highly variable flow coefficient vanishes. The theoretical, numerical and computational basis for isothermal moisture transport in building materials using Kirchhoff potentials is described.