Understanding viscoelastic flow instabilities: Oldroyd-B and beyond

HAC Sánchez, MR Jovanović, S Kumar… - Journal of Non …, 2022 - Elsevier
The Oldroyd-B model has been used extensively to predict a host of instabilities in shearing
flows of viscoelastic fluids, often realized experimentally using polymer solutions. The …

[PDF][PDF] Transport of complex and active fluids in porous media

M Kumar, JS Guasto, AM Ardekani - Journal of Rheology, 2022 - pubs.aip.org
Complex and active fluids find broad applications in flows through porous materials.
Nontrivial rheology can couple to porous microstructure leading to surprising flow patterns …

Perspectives on viscoelastic flow instabilities and elastic turbulence

SS Datta, AM Ardekani, PE Arratia, AN Beris… - Physical Review …, 2022 - APS
Viscoelastic fluids are a common subclass of rheologically complex materials that are
encountered in diverse fields from biology to polymer processing. Often the flows of …

Stagnation points control chaotic fluctuations in viscoelastic porous media flow

SJ Haward, CC Hopkins… - Proceedings of the …, 2021 - National Acad Sciences
Viscoelastic flows through porous media become unstable and chaotic beyond critical flow
conditions, impacting widespread industrial and biological processes such as enhanced oil …

Complex flows of viscoelastic wormlike micelle solutions

JP Rothstein, H Mohammadigoushki - Journal of Non-Newtonian Fluid …, 2020 - Elsevier
Micelles are formed by the self-assembly of surfactants in solutions. Wormlike micelles or
living polymers are a particularly interesting fluids because their long flexible cylindrical …

Asymmetric flows of complex fluids past confined cylinders: A comprehensive numerical study with experimental validation

S Varchanis, CC Hopkins, AQ Shen, J Tsamopoulos… - Physics of …, 2020 - pubs.aip.org
Three non-Newtonian constitutive models are employed to investigate how fluid rheological
properties influence the development of laterally asymmetric flows past confined cylinders …

Numerical investigation of multistability in the unstable flow of a polymer solution through porous media

M Kumar, S Aramideh, CA Browne, SS Datta… - Physical Review …, 2021 - APS
The flow of viscoelastic polymeric fluids through porous media is common in industrial
applications such as oil recovery and groundwater remediation. Polymeric stresses can lead …

Tristability in viscoelastic flow past side-by-side microcylinders

CC Hopkins, SJ Haward, AQ Shen - Physical Review Letters, 2021 - APS
Viscoelastic flows through microscale porous arrays exhibit complex path selection and
switching phenomena. However, understanding this process is limited by a lack of studies …

Birefringent strands drive the flow of viscoelastic fluids past obstacles

O Mokhtari, JC Latché, M Quintard… - Journal of Fluid …, 2022 - cambridge.org
The flow of polymer solutions past solid obstacles or through porous media gives rise to rich
physical phenomena over a wide range of spatial and temporal scales. Viscoelasticity, in …

[HTML][HTML] Elastic instabilities between two cylinders confined in a channel

M Kumar, AM Ardekani - Physics of Fluids, 2021 - pubs.aip.org
Polymeric flow through porous media is relevant in industrial applications, such as
enhanced oil recovery, microbial mining, and groundwater remediation. Biological …