Geometric scaling of purely-elastic flow instabilities

Abstract

We present a combined experimental, numerical and theoretical investigation of the geometric scaling of the onset of a purely-elastic flow instability in a serpentine channel. Good qualitative agreement is obtained between experiments, using dilute solutions of flexible polymers in microfluidic devices, and two-dimensional numerical simulations using the UCM model. The results are confirmed by a simple theoretical analysis, based on the dimensionless criterion proposed by Pakdel-McKinley for onset of a purely-elastic instability.

References in corpus (3)

• Elastic waves and transition to elastic turbulence in a two-dimensional viscoelastic Kolmogorov flow
• Criterion for purely elastic Taylor-Couette instability in the flows of shear-banding fluids
• Elastic instability in stratified core annular flow

Cited by in corpus (9)

• Pore-Scale Flow Characterization of Polymer Solutions in Microfluidic Porous Media
• Elastic turbulence generates anomalous flow resistance in porous media
• Disorder suppresses chaos in viscoelastic flows
• Bistability in the Unstable Flow of Polymer Solutions Through Porous Media
• Stagnation points control chaotic fluctuations in viscoelastic porous media flow
• Secondary flows of viscoelastic fluids in serpentine microchannels
• Elastic Instabilities in Flows through Pillared Micro channels
• Characterizing Elastic Turbulence in Channel Flows at Low Reynolds number
• Lid-driven cavity flow of viscoelastic liquids