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《Journal of Glaciology and Geocryology》 2006-03
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Numerical Analysis on the Heat Flux Density of a Freezing Pipe with Constant Outer Surface Temperature

YANG Wei-hao, HUANG Jia-hui (College of Architecture & Civil Engineering,China University of Mining & Technology,Xuzhou Jiangsu 221008,China)  
In order to reduce the number of variables,the equations and its parameters for freezing temperature field were converted to dimensionless ones according to the theory of similitude at first.Secondly,a dimensionless model for finite-element method was established,and 167 706 numerical computations were carried out to study the dimensionless heat flux density on the outer surface of a freezing pipe with constant temperature,and then the relationships between the dimensionless heat flux density and its influential factors were obtained.It is found that the dimensionless heat flux density linearly increases with the ratio of the heat-transfer conductivity of soil to that of frozen soil,has a linear relationship with the ratio of the volumetric specific heat of frozen soil to that of soil,rises with the dimensionless latent heat of the freezing soil,and linearly decreases with the dimensionless temperature of calcium chloride brine,linearly decreases with f~-1/3(f is the dimensionless time).A regression formula among the dimensionless heat flux density and its influential factors were developed at last,which is with high accuracy and easy to use by an engineer.
【CateGory Index】: TU94
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