土壤水-气二相流模型初探  

Preliminary Discussion on Two-phase Flow Model in Soil

作　　者：马洪云[1] 卢文喜[1] 薛雅贤 李俊[1] 

机构地区：[1]吉林大学环境与资源学院,吉林长春130026 [2]吉林省地质环境监测总站,吉林长春130021

出　　处：《节水灌溉》2005年第5期17-19,共3页Water Saving Irrigation

基　　金：国家自然科学基金项目(40273047)

摘　　要：目前,土壤水-气二相流模型主要采用土壤水相、气相流连续性方程来实现。然而,此二相流连续性模型在实际模拟过程中有很大困难。通过两点假设引入土壤气相流状态方程,并建立新的土壤水-气二相流模型,使二相流模型的模拟容易实现。由于实验条件暂不具备,仅完成了考虑气相流和不考虑气相流的对比模拟。通过模拟得出:气相流的存在的确对土壤水分运移产生影响,但并非主要因素,与前人的研究结果相一致,可以用此水-气二相流模型来模拟土壤水分的运移。此模型需要进一步的实验研究来证实和改进。At present, the two-phase flow model of soil moisture is mostly built through continuity function of soil water phase and soil vapor phase, but simulation of the model encounters severe problems. In this paper, the state function of soil vapor phase was introduced through two assumptions, and a new two-phase flow model of soil water that is more convenient to simulate was built. The result of comparison simulation of two-phase and one-phase flow model showed that existing of vapor phase surely affected the transformation of soil moisture, but it was not main factor. This was accordance with fore investigation. So the new model can be used to simulate two-phase flow of soil moisture, but it should be validated and improved through farther experiment.

关 键 词：土壤水 气相流模型 水-气二相流 对比模拟 

分 类 号：S152.72[农业科学—土壤学]