2021/05/24 by Simon J. Haward, Cameron C. Hopkins, Amy Q. Shen
Chemical Engineering · Engineering · Medicine · Physics and Astronomy · #Blood properties and coagulation #Chaotic #Computer science #Flow (mathematics) #Geology #Geotechnical engineering #Instability #Lattice Boltzmann Simulation Studies #Materials science #Mechanics #Physics #Porosity #Porous medium #Rheology and Fluid Dynamics Studies #Statistical physics #Thermodynamics #Viscoelasticity #Work (physics) #physics.flu-dyn
paper · pdf · doi:10.1073/pnas.2111651118
arxiv created 2021/05/24 · openalex publication_date 2021/09/14 · arxiv updated 2021/10/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
124, 164501 (2020)] demonstrated that geometric disorder greatly suppressed the strength of the chaotic fluctuations that arose as the flow rate was increased. However, in that work, disorder was only applied to one originally ordered configuration of posts. Here, we demonstrate experimentally that, given a slightly modified ordered array of posts, introducing disorder can also promote chaotic fluctuations. We provide a unifying explanation for these contrasting results by considering the effect of disorder on the occurrence of stagnation points exposed to the flow field, which depends on the nature of the originally ordered post array. This work provides a general understanding of how pore geometry affects the stability of viscoelastic porous media flows.