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With the development of seepage mechanics in various fields, many problems demand the flow process of micro seepage such as the movement of gas-liquid interface in porous medium. In this paper, the problems and solutions of the single phase and multi phase micro seepage based on the classical seepage mechanics, CT scanning technique, percolation theory, micro seepage simulation technique and topology network model in porous medium are expounded. Also the characteristics of each method were analyzed, and the future development was prospected.
The network topology is adopted in this paper to put forward a kind of simplified model of gas diffusion electrode. Liquid micro distribution map and the relationship between the probability of liquid getting through and hydrophilic property are obtained by numerical modeling calculation. It is revealed that how liquid penetrate medium in the graph. The result shows that the topology of the network model is suitable for describing micro permeation problem.
This paper investigates a method to describing the
porous medium, which is simplifying the pore part of porous medium into network
structure model consist of node and pipeline. We simulate seepage flow of water
and air in porous medium through this model, obtain the figures of gas-liquid
distribution when steady, and cipher out the probability of that water flows
through the whole medium.