Virtual Seminar"Viscoelastic fluids through porous media: flow instability and particle transport"Arezoo Ardekani

Micro/Bio/Nanofluidics (Shen) Unit would like to invite you to the virtual seminar by Prof. Arezoo Ardekani on November 1 (Monday).
 
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Date: Monday, November 1, 2021
Time: 09:00-10:00
**Zoom session
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Join Zoom Meeting
https://oist.zoom.us/j/84501310294?pwd=d1JvdGcxd24vbXNjUWV2RmhyUXNmZz09
 
Meeting ID: 845 0131 0294
Passcode: 571454

Speaker:

Prof. Arezoo Ardekani
School of Mechanical Engineering
Purdue University, USA

Title:

Viscoelastic fluids through porous media: flow instability and particle transport

Abstract:

Viscoelastic fluid flows through porous media are common in industrial and biological applications ranging from oil recovery and groundwater remediation to drug transport in tissue. Polymeric stresses affect the topology and stability of these flows, and thus, their macroscopic transport properties.  We numerically study the flow topology, instability, and dispersion of viscoelastic flow through porous media. Inertial stresses here are negligible, and instead, the flow is dominated by elasticity and viscosity; their relative effects are characterized by the Weissenberg number. At small Weissenberg numbers, stable eddies appear, whereas at large Weissenberg numbers, strong flow fluctuations due to high polymeric stresses lead to the formation of highly unstable eddies in different regions of the pores and multiple distinct unstable flow structures occur. The stretched polymeric chains inside the pore facilitate eddy formation, whereas relaxed chains lead to eddy free regions.  We also discuss the dispersion of particles in these flows.

Host:

Prof. Amy Shen