Modeling coupled water, heat and solute transport in unsaturated soils during freezing and thawing with meltwater infiltration.

模拟冻结和解冻过程中非饱和土壤中水、热和溶质与融水渗透的耦合传输。

• 批准号: 20589001
• 负责人: WATANABE Kunio
• 金额: $ 2.61万
• 依托单位: Mie University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20589001/
• 关键词: 凍土; 浸潤; 水・熱移動; 水分特性曲線; 不飽和透水係数; 不凍水; 数値解析; 不飽和土壌; 水分特性関数モデル; 寒冷地水循環; 数値計算; 不飽和土; 水分特性関数; モデル化; 成層土; 凍土; 浸潤; 水・熱移動; 水分特性曲線; 不飽和透水係数; 不凍水; 数値解析; 不飽和土壌; 水分特性関数モデル; 寒冷地水循環; 数値計算; 不飽和土; 水分特性関数; モデル化; 成層土

We developed moisture-and thermo-sensors, thermo-dielectric-analyzer and double-ring-permeameter, and obtained hydraulic and thermal properties of frozen unsaturated soils. We also performed directional column freezing experiments and showed the water, heat and solute transport during soil freezing/thawing, and meltwater infiltration into frozen soil. Based on these data, numerical calculations were carried out, and a coupled water and heat transport model for soil freezing process designed with non equilibrium formation of ice was proposed. Modifying the model to simulate infiltration with soil thawing is the issue in the future.

我们开发了水分和热传感器，热式 - 二旋转分析仪和双环透水仪，并获得了冷冻不饱和土壤的液压和热性能。我们还进行了定向柱冷冻实验，并在土壤冷冻/解冻期间显示了水，热和溶质传输，并融化了融化的土壤。基于这些数据，进行了数值计算，并提出了一个耦合的水和热传输模型，用于土壤冻结过程，设计了不平衡的冰层。未来，修改模型以用土壤融化模拟浸润是该问题。