Different discretization method used in coupled water and heat
transport mode for soil under freezing conditions |
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| Authors: | WeiNan Mao and JianKun Liu |
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| Institution: | School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | A coupled water and heat transport mode is established based on the Richards equation to study water flow and heat
transport in soil during freezing process. Both the finite difference and finite element method are used in the discretization,
respectively. Two different computer programs are written and used to simulate an indoor unidirectional frozen test. The
freezing depth, freezing rate and temperature variation are compared among lab tests, finite difference calculation simulation
and finite element calculation simulation. Result shows that: the finite difference method has a better performance in
freezing depth simulation while the finite element method has a better performance in numerical stability in
one-dimensional freezing simulation. |
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| Keywords: | freezing soil coupled water and heat finite difference finite element freezing test simulation |
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