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We develop and validate a new model to study simultaneous erosion anddeposition in three-dimensional porous media. We study the changes of theporous structure induced by the deposition and erosion of matter on the solidsurface and find that when both processes are active, channelization in theporous structure always occurs. The channels can be stable or only temporarydepending mainly on the driving mechanism. Whereas a fluid driven by a constantpressure drop in general does not form steady channels, imposing a constantflux always produces stable channels within the porous structure. Furthermorewe investigate how changes of the local deposition and erosion propertiesaffect the final state of the porous structure, finding that the larger therange of wall shear stress for which there is neither erosion nor deposition,the more steady channels are formed in the structure.

Channelization in Porous Media driven by Erosion and Deposition