1st Place, 92nd Annual Meeting, Oct 2021, Bangor - Manish Kumar
1st Place, 92nd Annual Meeting, Oct 2021, Bangor
Elastic instabilities in confined geometries Manish Kumar and Arezoo M. Ardekani
Mechanical Engineering, Purdue University, West Lafayette, IN
Paper Number
PO18
Session
Poster Session
Title
Elastic instabilities in confined geometries
Presentation Date and Time
October 13, 2021 (Wednesday) 6:30
Track / Room
Poster Session / Ballroom 1-2-3-4
Authors (Click on name to view author profile)
Author and Affiliation Lines (in printed abstract book)
Manish Kumar and Arezoo M. Ardekani
Mechanical Engineering, Purdue University, west lafayette, IN 47906
Speaker / Presenter
Kumar, Manish
Keywords
confined flows; flow-induced instabilities; non-Newtonian fluids; polymer solutions
Text of Abstract
Polymeric flow through confined geometries is relevant in industrial applications such as enhanced oil recovery, microbial mining, groundwater remediation, and biological processes such as drug delivery, particles and cells transport during respiration and fertilization. Large elastic stresses induced due to confined geometries lead to elastic instabilities in the viscoelastic flows. We study viscoelastic instabilities in the confined geometries made of series of expansion-contraction obstacles and cylinders. The accumulation of polymeric stress as polymeric chains advect through closely placed obstacles creates strands of high polymeric stress. These strands act as a barrier for the flow crossing the regions, which leads to flow separation and formation of multiple flow states. The formation of strands of polymeric stress regulates the macroscopic transport of fluid and particles in realistic porous media.