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Paper detail

Dumbbells in suspension: A numerical study on their dynamics and shear viscosity

The dynamics of elastic dumbbells in linear shear flow is investigated by fluid particle dynamics simulations at small Reynolds numbers. The positive contribution of a single dumbbell to the effective shear viscosity is determined via the extra stress exerted at the boundaries of the shear cell and the difference to the contributions obtained via the Kramers-Kirkwood formula are described. For a small Weissenberg number and when the mean dumbbell length becomes larger than the mean next-neighbor distance, the contribution of interacting dumbbells to the mean shear viscosity exceeds significantly the contribution of unconnected beads occupying the same volume fraction.

preprint2013arXivOpen access
Johannes GreberJochen BammertPhilippe PeylaWalter Zimmermann
cond-mat.soft
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Johannes GreberJochen BammertPhilippe PeylaWalter Zimmermann

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