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CUDA simulations of active dumbbell suspensions

Victor Putz, Jorn Dunkel, Julia M. Yeomans
Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, United Kingdom
Chem. Phys. 375(2-3): 557-567, 2010, arXiv:1004.1932 [cond-mat.soft] (12 Apr 2010)

@article{putz2010cuda,

   title={CUDA simulations of active dumbbell suspensions},

   author={Putz, V. and Dunkel, J. and Yeomans, J.M.},

   journal={Chemical Physics},

   issn={0301-0104},

   year={2010},

   publisher={Elsevier}

}

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We describe and analyze CUDA simulations of hydrodynamic interactions in active dumbbell suspensions. GPU-based parallel computing enables us not only to study the time-resolved collective dynamics of up to a several hundred active dumbbell swimmers but also to test the accuracy of effective time-averaged models. Our numerical results suggest that the stroke-averaged model yields a relatively accurate description down to distances of only a few times the dumbbell’s length. This is remarkable in view of the fact that the stroke-averaged model is based on a far-field expansion. Thus, our analysis confirms that stroke-averaged far-field equations of motion may provide a useful starting point for the derivation of hydrodynamic field equations.
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