Scaling effect of breakthrough character in porous media  

作　　者：Xuejiao Hu Jianhua Du Xiang Liu Buxuan Wang 

机构地区：[1]Tsing Hua Univ, Dept Thermal Engn, Beijing 100084, Peoples R China

出　　处：《Chinese Science Bulletin》2001年第10期878-880,共3页

基　　金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 59995550-3 and 59776048).

摘　　要：Breakthrough phenomenon during fluids percolating through wet saturated porous layer is widely met in the study of heat and mass transfer in porous media. Breakthrough pressure (BP) is a characteristic pressure that indicates the intrinsic properties of seepage within porous media. Measuring results of BP for saturated narrow-sieved sand are reported here. The curve of BP varying with the height of porous layer was obtained. Experiment and analysis indicate that BP is independent of the height of particle packed layer if thick enough; however, when the height is less than a certain critical value, BP diminishes with the decrease of the height according to a universal scaling law.Breakthrough phenomenon during fluids percolating through wet saturated porous layer is widely met in the study of heat and mass transfer in porous media. Breakthrough pressure (BP) is a characteristic pressure that indicates the intrinsic properties of seepage within porous media. Measuring results of BP for saturated narrow-sieved sand are reported here. The curve of BP varying with the height of porous layer was obtained. Experiment and analysis indicate that BP is independent of the height of particle packed layer if thick enough; however, when the height is less than a certain critical value, BP diminishes with the decrease of the height according to a universal scaling law.

关 键 词：BREAKTHROUGH pressure POROUS media PERCOLATION BOILING enhanced POROUS surface SCALING law. 

分 类 号：O357.3[理学—流体力学]