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Item type:Publication, Access status: without files , Pore-Network Simulation of Drying of Heterogeneous and Stratified Porous Media(2019); ; Drying of porous materials is a phenomenon that is important to numerous problems in science and technology to remediation and recovery of soil contaminated with hydrocarbons to recovery of volatile hydrocarbons from oil reservoirs, cosmetics, building restoration, and such material processing as the production of food, wood, paper, textiles, pharmaceuticals, and washing powders. M. A. Knackstedt et al. demonstrated that the extended correlations at core scale are also well approximated by a Fractional Browning motion. A. G. Yiotis et al. showed that both advection and capillarity affect the drying patterns and rates. Thus, assume slow flow of the liquid in the pore-network (PN). Mass transfer in the vapor phase is by diffusion, for which the driving force is the concentration gradient alongside the drying front. The invasion of the PN by the drying front increases the resistance imposed by the emptied larger throats in the dried regions.Publicationtype: Book Part46 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Pore-network model of evaporation-induced salt precipitation in porous media: The effect of correlations and heterogeneity(2018-02); ; Salt transport and precipitation in porous media constitute a set of complex and fascinating phenomena that are of considerable interest to several important problems, ranging from storage of CO in geological formations, to soil fertility, and protection of pavements and roads, as well as historical monuments. The phenomena occur at the pore scale and are greatly influenced by the heterogeneity of the pore space morphology. We present a pore-network (PN) model to study the phenomena. Vapor diffusion, capillary effect at the brine-vapor interface, flow of brine, and transport of salt and its precipitation in the pores that plug the pores partially or completely are all accounted for. The drying process is modeled by the invasion percolation, while transport of salt in brine is accounted for by the convective-diffusion equation. We demonstrate that the drying patterns, the clustering and connectivity of the pore throats in which salt precipitation occurs, the saturation distribution, and the drying rate are all strongly dependent upon the pore-size distribution, the correlations among the pore sizes, and the anisotropy of the pore space caused by stratification that most natural porous media contain. In particular, if the strata are more or less parallel to the direction of injection of the gas that dries out the pore space (air, for example) and/or causes salt precipitation (CO , for example), the drying rate increases significantly. Moreover, salt tends to precipitate in clusters of neighboring pores that are parallel to the open surface of the porous medium. 2 2Publicationtype: Journal Article38 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Pore Network Modeling of Salt Precipitation in Porous Media(2016); ; Publicationtype: Conference Presentation17