| 红壤中水热耦合转化的实验和数值模拟研究 |
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| 引用本文： | HAN Xiao-Fei,LU Jun,LIU Yun-Long,YU Li-Zhong. 红壤中水热耦合转化的实验和数值模拟研究[J]. 土壤圈, 2001, 11(2): 123-130 |
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| 作者姓名： | HAN Xiao-Fei LU Jun LIU Yun-Long YU Li-Zhong |
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| 作者单位： | [1]DepartmentofGeography,EastChianNormalUniversity,Shanghai200062（China） [2]DepartmentofResourceScience,ZhejiangUniversity,Hangzhou310029（China） |
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| 基金项目： | *1Project (No.49671050) supported by the National Natural Science Foundation of China. |
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| 摘 要： | Coupled transfer of soil water and heat in closed columns of homogeneous red soil was studied under laboratory conditions.A coupled model was constructed using soil physical theory,empirical equations and experimental data to predict the coupled transfer.The results show that transport of soil water was affected by temperaature gradient,and the largest net water transport was found in the soil column with initial water content of 0.148m^3m^-3,At the same time,temperature changes with the transport of soil water was in a nonlinear shape as heat parameters wre function of water content,and the changes of temperature were positively correlated with the net amount of water transported.Numerical modelling results show that the predicted values of temperature distribution were close to the observed values,while the predicted values of water content exhibited limited deviation at both ends of the soil column due to the slight temperature changes at both ends .It WAS indicated that the model proposed here was applicable.
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| 关 键 词： | 水热输送 红土 数值模型 土壤物理学 |
Coupled transfer of water and heat in red soil: Experiment and numerical modelling |
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| HAN Xiao-Fei,LU Jun,LIU Yun-Long and YU Li-Zhong. Coupled transfer of water and heat in red soil: Experiment and numerical modelling[J]. Pedosphere, 2001, 11(2): 123-130 |
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| Authors: | HAN Xiao-Fei LU Jun LIU Yun-Long YU Li-Zhong |
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| Affiliation: | Department of Geography, East China Normal University, Shanghai 200062 (China);Department of Resource Science, Zhejiang University, Hangzhou 310029 (China);Department of Resource Science, Zhejiang University, Hangzhou 310029 (China);Department of Geography, East China Normal University, Shanghai 200062 (China) |
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| Abstract: | Coupled transfer of soil water and heat in closed columns of homogeneous red soil was studied under laboratory conditions.A coupled model was constructed using soil physical theory,empirical equations and experimental data to predict the coupled transfer.The results show that transport of soil water was affected by temperaature gradient,and the largest net water transport was found in the soil column with initial water content of 0.148m^3m^-3,At the same time,temperature changes with the transport of soil water was in a nonlinear shape as heat parameters wre function of water content,and the changes of temperature were positively correlated with the net amount of water transported.Numerical modelling results show that the predicted values of temperature distribution were close to the observed values,while the predicted values of water content exhibited limited deviation at both ends of the soil column due to the slight temperature changes at both ends .It WAS indicated that the model proposed here was applicable. |
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| Keywords: | coupled transfer of water and heat numerical modelling red soil |
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