Parameterization of the Model of Artificial Clay Freezing Considering the Effect of Pore Water Salinity

Fluids

卷:7

Gennadiy Brovka¹  Kirill Agutin¹  Andrey Brovka¹  Mikhail Semin²  Sergey Bublik²  Lev Levin² 

[1] Institute of Nature Management, National Academy of Sciences of Belarus, 220072 Minsk, Belarus;

[2] Mining Institute of the Ural Branch of the Russian Academy of Sciences, 614007 Perm, Russia;

关键词: artificial ground freezing;    heat transfer;    freezing of water;    sodium chloride solution;    numerical simulation;    thermal properties;   

DOI  :  10.3390/fluids7060186

来源: DOAJ

【 摘 要 】

This paper considers the artificial freezing of an argillite-like clay layer containing a NaCl salt solution in its pore space. The experimental results of the thermophysical properties of the clay with various salinities and water content in soil samples are presented. We determine the parameters of the soil freezing characteristic curves, the dependences of the specific heat capacity, and thermal conductivity based on temperature and salinity. These parameters are used in the formulation of a simple thermodynamic model for the artificial freezing of a clay layer with a single freezing pipe. The model includes diffusive transfer of heat and salt concentration, as well as salt precipitation when the eutectic point is reached. The motivation for using the simplified model is to understand the general patterns of soil freezing when considering the effect of salinity, as well as to test the proposed numerical finite-difference algorithm for solving the problem of freezing a clay layer based on the method of equivalent heat capacities. Using the algorithm, we analyzed the regularities of the redistribution of dissolved and precipitated salt in frozen soil, and also evaluated the effect of diffusive salt transfer on the numerical solution.

【 授权许可】

Unknown