Diagram of the system simulated.
Polymer configurations as a function of increasing applied pressure. In each case 200 independent configurations are superimposed to show the volume mapped out by the polymer. The system is shown at varying degrees of magnification, the actual channel (the light grey area) width does not change.
Axial spans along for a 100-bead polymer at different applied pressures: (a) , unperturbed sphere (parabolic fit); (b) , perturbed sphere; (c) , trumpet (hyperbolic fit); (d) , flower (linear fit to stem); and (e) , rod (linear fit).
Comparison of the axial spans in the - and -directions for a 100-bead polymer at different applied pressures.
(a) Average drag force per unit length as a function of , the distance along the flow axis from the tethered end of the polymer. (b) Comparison of the negative of the drag, integrated from the grafting point to , with the average spring tension at . These results are for a 100-bead tethered polymer at an applied pressure of 0.01.
(a) Extension as a function of peak flow velocity for chains of length 50, 100, 200, and 400 beads. (b) The same data plotted in terms of the scaled variables and the Weissenberg number .
A comparison of the solvent flow profiles across a system with and without a tethered polymer at applied pressures of (a) 0.02, (b) 0.001, and (c) 0.005.
The pressure-velocity relation for the solvent-only system and for a system with a 50- or 100-bead grafted polymer shown on (a) log-log and (b) linear-linear scales.
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