Bifurcation of Viscous Fingering in Polymer Fluid
Details
A viscous fingering pattern have been observed when a fluid is injected into a more viscous fluid through a small hole at the center of a parallel plate. Aqueous glycerin solutions are used as Newtonian fluids, and aqueous glycerin solutions adding polyacrylamide (SeparanAP30) are used as non-Newtonian fluids. It was found that it showed the bifurcation of viscous fingering to be different by a kind of solution. It was found that the solution concentration, gap and air pressure influenced a bifurcation pattern. Furthermore, viscosity and air pressure influenced tip speed of bifurcation in Newton fluid.
