SI Movie 1

Comparison of flow behavior along the length of the pore constriction array for the 300 ppm HPAM, Gl-Aq solution in the $l_s = W_0$ geometry. All pores correspond to $\mathrm{Wi} = 15$ and $\mathrm{De} = 2.5$ above the onset of 3D unsteady, multistable flow. Pores near the (a,b) inlet, (c,d) middle, and (e,f) outlet of the 1D array qualitatively show similar behavior, suggesting that there is minimal effect of polymer degradation along the length of the array, where degradation would instead be characterized by a reduction in unstable flow character in progressively downstream pores due to loss of fluid elasticity.