1 code implementation • 18 Jan 2021 • Ondrej Maxian, Raul P. Peláez, Leslie Greengard, Aleksandar Donev
Our method achieves spectral accuracy by using Ewald splitting to replace the original Poisson equation for nearly-singular sources with a smooth far-field Poisson equation, combined with a localized near-field correction.
Numerical Analysis Numerical Analysis 65N35, 78M22
1 code implementation • 23 Jul 2020 • Ondrej Maxian, Alex Mogilner, Aleksandar Donev
Numerical simulation of this gel is challenging because the fiber aspect ratios can be as large as $10^4$.
Numerical Analysis Numerical Analysis 65M70, 65R20, 76Z05, 76D07
1 code implementation • 12 May 2020 • Brennan Sprinkle, Ernest B. van der Wee, Yixiang Luo, Michelle Driscoll, Aleksandar Donev
We develop a lubrication-corrected Brownian Dynamics method for dense suspensions of driven colloids sedimented above a bottom wall.
Soft Condensed Matter
2 code implementations • 5 Oct 2017 • Aleksandar Donev, Chiao-Yu Yang, Changho Kim
We develop a Split Reactive Brownian Dynamics (SRBD) algorithm for particle simulations of reaction-diffusion systems based on the Doi or volume reactivity model, in which pairs of particles react with a specified Poisson rate if they are closer than a chosen reactive distance.
Statistical Mechanics
1 code implementation • 5 Sep 2017 • Yuanxun Bao, Manas Rachh, Eric Keaveny, Leslie Greengard, Aleksandar Donev
We present a fluctuating boundary integral method (FBIM) for overdamped Brownian Dynamics (BD) of two-dimensional periodic suspensions of rigid particles of complex shape immersed in a Stokes fluid.
Numerical Analysis
1 code implementation • 25 Jan 2017 • Yuanxun Bao, Aleksandar Donev, Boyce E. Griffith, David M. McQueen, Charles S. Peskin
The aim of this paper is to greatly reduce the volume error of the IB method by introducing velocity-interpolation and force-spreading schemes with the properties that the interpolated velocity field in which the structure moves is at least C1 and satisfies a continuous divergence-free condition, and that the force-spreading operator is the adjoint of the velocity-interpolation operator.
Numerical Analysis Computational Physics
2 code implementations • 1 Dec 2016 • Florencio Balboa Usabiaga, Blaise Delmotte, Aleksandar Donev
We develop efficient numerical methods for performing many-body Brownian dynamics simulations of a recently-observed fingering instability in an active suspension of colloidal rollers sedimented above a wall [M. Driscoll, B. Delmotte, M. Youssef, S. Sacanna, A. Donev and P. Chaikin, Nature Physics, 2016, doi:10. 1038/nphys3970].
Soft Condensed Matter
1 code implementation • 29 Jun 2015 • Steven Delong, Florencio Balboa Usabiaga, Aleksandar Donev
We introduce numerical methods for simulating the diffusive motion of rigid bodies of arbitrary shape immersed in a viscous fluid.
Soft Condensed Matter
1 code implementation • 12 Feb 2015 • Roberto Cerbino, Yifei Sun, Aleksandar Donev, Alberto Vailati
Both experiments and simulations show that during the onset the fluctuations exhibit scale invariance at large wave vectors.
Soft Condensed Matter
1 code implementation • 23 Oct 2014 • Cédric Giraudet, Henri Bataller, Yifei Sun, Aleksandar Donev, José Maria Ortiz de Zárate, Fabrizio Croccolo
Fluctuations in a fluid are strongly affected by the presence of a macroscopic gradient making them long-ranged and enhancing their amplitude.
Soft Condensed Matter Mesoscale and Nanoscale Physics
