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Discrimination between Pore and Throat Resistances against Single-Phase Flow in Porous Media

Adloo, Hadi ; Foshat, Saeed ; Vaferi, Behzad ; Alobaid, Falah ; Aghel, Babak (2022):
Discrimination between Pore and Throat Resistances against Single-Phase Flow in Porous Media. (Publisher's Version)
In: Water, 14 (7), MDPI, e-ISSN 2073-4441,
DOI: 10.26083/tuprints-00021116,
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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Discrimination between Pore and Throat Resistances against Single-Phase Flow in Porous Media
Language: English
Abstract:

This study investigates the critical agents that cause non-Darrian flow in porous media. Four porous media different in morphology but similar in topology were studied numerically. By varying the throat diameters, the distinct roles of pores and throats in total dissipation were investigated using direct numerical simulation. Forchheimer model was selected to analyze the non-Darcian flow. In our simplified geometry, the ratio KappKD can best be correlated by non-Darcy effect (E). Total dissipation is directly related to the porous medium resistance against fluid flow. The energy dissipated in pores and throats was calculated by summing the dissipation in each computational segment. Pores are more prone to disobey the Darcy model than throats due to irregularity in fluid flow, and they are introduced as the cause of Darcy-model cessation. By increasing the pore-to-throat ratio, the non-Darcian flow in the pores begins sooner. The results show that the energy dissipation due to eddies is negligible. The dissipation in pores and throats was simulated through separate power-law equations, and their exponents were also extracted. The exponent for the pore body is equal to two when the viscous forces are dominant, and it increases by increasing the inertia force. The dissipation due to pore bodies is more apparent when the size of pore and throats are of the same order of magnitude. The relative losses of pore body increase as the velocity increases, in contrast to throats.

Journal or Publication Title: Water
Journal volume: 14
Issue Number: 7
Publisher: MDPI
Collation: 20 Seiten
Uncontrolled Keywords: single-phase flow, model porous medium, pore network analysis, non-Darcian flow, eddy formation, inertial core flow
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Institut für Energiesysteme und Energietechnik (EST)
Date Deposited: 08 Apr 2022 11:28
Last Modified: 08 Apr 2022 11:28
DOI: 10.26083/tuprints-00021116
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-211165
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21116
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