The Mechanism behind Erosive Bursts in Porous Media

Erosion and deposition during flow through porous media can lead to large erosive bursts that manifest as jumps in permeability and pressure loss. Here we reveal that the cause of these bursts is the re-opening of clogged pores when the pressure difference between two opposite sites of the pore surpasses a certain threshold. We perform numerical simulations of flow through porous media and compare our predictions to experimental results, recovering with excellent agreement shape and power-law distribution of pressure loss jumps, and the behavior of the permeability jumps as function of particle concentration. Furthermore, we find that erosive bursts only occur for pressure gradient thresholds within the range of two critical values, independent on how the flow is driven. Our findings provide a better understanding of sudden sand production in oil wells and breakthrough in filtration.Comment: 7 pages, 8 figure

Baseline characteristics of study participants and comparison between robust, pre-frail and frail women according to the PF classification¹.

<p>¹ Mean follow-up = 3.01 years;</p><p>² One-way analysis of variance (ANOVA) test;</p><p>³ Mantel-Haenszel Chi-square test;</p><p>⁴ Chi-square test;</p><p>PF: phenotypic frailty; SD: standard deviation; BMI: body mass index</p><p>Baseline characteristics of study participants and comparison between robust, pre-frail and frail women according to the PF classification<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0120144#t001fn001" target="_blank">¹</a>.</p

Quality of anticoagulation and use of warfarin-interacting medications in long-term care: A chart review-2

<p><b>Copyright information:</b></p><p>Taken from "Quality of anticoagulation and use of warfarin-interacting medications in long-term care: A chart review"</p><p>BMC Geriatrics 2008;8():13-13.</p><p>Published online 3 Jul 2008</p><p>PMCID:PMC2464578.</p><p></p

Quality of anticoagulation and use of warfarin-interacting medications in long-term care: A chart review-1

<p><b>Copyright information:</b></p><p>Taken from "Quality of anticoagulation and use of warfarin-interacting medications in long-term care: A chart review"</p><p>http://www.biomedcentral.com/1471-2318/8/13</p><p>BMC Geriatrics 2008;8():13-13.</p><p>Published online 3 Jul 2008</p><p>PMCID:PMC2464578.</p><p></p

Additional file 2: of Effects of dance on cognitive function among older adults: a protocol for systematic review and meta-analysis

Proposed search strategy (or strategies) and terms. This file contains proposed search strategy for MEDLINE in OVID interface. (DOCX 12 kb

Additional file 1: of Effects of dance on cognitive function among older adults: a protocol for systematic review and meta-analysis

PRISMA-P 2015 Checklist. This file contains Preferred Reporting Items for Systematic Review and Meta-analysis Protocols (PRISMA-P) 2015 checklist. (DOCX 30 kb

Additional file 2: Additional Results. of Osteoporotic fractures and obesity affect frailty progression: a longitudinal analysis of the Canadian multicentre osteoporosis study

This document presents additional results of the analysis. It contains 2 figures (Supplemental Figures S1a and S1b) and 23 tables (Supplemental Tables S1 to S23) (DOCX 281 kb

Additional file 1: of Getting fit for hip and knee replacement: a protocol for the Fit-Joints pilot randomized controlled trial of a multi-modal intervention in frail patients with osteoarthritis

SPIRIT Checklist. (DOC 121 kb