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- W4313598520 abstract "Rigid particles in a Stokesian fluid can physically not overlap, as a thin layer of fluid always separates a particle pair, exerting increasingly strong repulsive forces on the bodies for decreasing separations. Numerically, resolving these lubrication forces comes at an intractably large cost even for moderate system sizes. Hence, it can typically not be guaranteed that particle collisions and overlaps do not occur in a dynamic simulation, independently of the choice of method to solve the Stokes equations. In this work, non-overlap constraints, in terms of the Euclidean distance between boundary points on the particles, are represented via a barrier energy. We solve for the minimum magnitudes of repelling contact forces between any particle pair in contact to correct for overlaps by enforcing a zero barrier energy at the next time level, given a contact-free configuration at a previous instance in time. The method is tested using a multiblob method to solve the mobility problem in Stokes flow applied to suspensions of spheres, rods and boomerang shaped particles. Collision free configurations are obtained at all instances in time. The effect of the contact forces on the collective order of a set of rods in a background flow that naturally promote particle interactions is also illustrated." @default.
- W4313598520 created "2023-01-06" @default.
- W4313598520 creator A5075720059 @default.
- W4313598520 creator A5091831807 @default.
- W4313598520 date "2023-01-04" @default.
- W4313598520 modified "2023-10-01" @default.
- W4313598520 title "A Barrier Method for Contact Avoiding Particles in Stokes Flow" @default.
- W4313598520 doi "https://doi.org/10.48550/arxiv.2301.01666" @default.
- W4313598520 hasPublicationYear "2023" @default.
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