CUDA simulations of active dumbbell suspensions

Journal article

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. Crown Copyright © 2010 Published by Elsevier B.V. All rights reserved.

Authors: Putz, V; Dunkel, J; Yeomans, J

• Publication status: Published
• Journal: CHEMICAL PHYSICS
• Volume: 375
• Issue: 2-3
• Pages: 557-567
• Publication date: 2010-10-05
• DOI: 10.1016/j.chemphys.2010.04.025
• ISSN: 0301-0104
• Language: English
• Keywords: Low Reynolds number motions; Fluctuation phenomena; Swimming microorganisms