Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Complex Fluid Flow Through a Constricted Microchannel
Submission Author:
José Angel Florián Gutiérrez , RJ , Brazil
Co-Authors:
José Angel Florián Gutiérrez, Maria Moura, Marcio CARVALHO
Presenter: José Angel Florián Gutiérrez
doi://10.26678/ABCM.COBEM2017.COB17-1954
Abstract
This work presents a study of the flow of a viscoelastic solution of PEO (0.1 wt% Polyethylene Oxide solution) through a constricted glass microchannel, used as model for a pore-throat geometry of a porous media. Pressure drop measurements are performed and flow velocity fields are obtained using the micro particle image velocimetry (micro-PIV) technique. Experiments with a viscous solution of glycerin (61 wt% glycerin in water), of similar shear viscosity to the PEO solution, were also performed to investigate elastic effects of the PEO solution. Non-linear pressure drop behavior due to extensional effects of the PEO solution were observed. The velocity fields of the glycerin solution showed a permanent regime for the entire flow rate range explored, while the PEO solution shows changes in the direction of the flow and velocity fluctuations over time for high flow rates. In addition, the presence and growth of vortices (upstream of the constriction) were observed for the PEO solution. This study provides important information on how viscoelastic polymer solutions behave in a porous media and can impact their use in Enhanced Oil Recovery.
Keywords
polymeric solutions, viscoelasticity, Viscoelastic turbulence, Microfluidics
