›› 2006, Vol. 27 ›› Issue (12): 2085-2089.

• Fundamental Theroy and Experimental Research •     Next Articles

Numerical integral solutions of heat transfer and moisture transport in unsaturated porous media

BAI Bing1, LIU Da-peng2   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. Beijing Communications Management Institute, Beijing 065201, China
  • Received:2005-03-01 Online:2006-12-11 Published:2013-12-09

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Abstract: Coupled governing differential equations for both moisture transfer and heat flow are introduced. The approach adopted is based on the total potential for liquid flow being composed of the temperature potential, the elevation and the capillary potential. Besides, a simplified governing equation with heat source is given. The solutions of a semi-infinite unsaturated porous medium subjected to a plane heat source with variable strength with time on its free surface are studied. The numerical integral methods for calculating the unsteady temperature field, volumetric water content field are studied. The evolutions of temperature and moisture content are given under the conditions of constant and variable heat strengths; and the gravitational influences are also analyzed.

Key words: temperature potential, capillary potential, heat transfer, mass transport, volumetric water content

CLC Number: 

  • O 357.3
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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