Cooperation of sperm in two dimensions: synchronization, attraction, and aggregation through hydrodynamic interactions.

Hydrodynamic interactions enhance gelation in dispersions of colloids with short-ranged attraction and long-ranged repulsion.

We show that discrete element simulations of colloidal gelation must account for hydrodynamic interactions between suspended particles through investigation of gelation in a dispersion of colloids interacting pair-wise via short-ranged attraction and long-ranged repulsion (SALR). These dynamic simulations juxtapose self-assembly with and without hydrodynamic interactions between the particles. ...

Hydrodynamic interactions of sheets vs filaments: Synchronization, attraction, and alignment

Business Cycle Synchronization and Patterns of Trade: Cases from Gulf Cooperation Council Countries

 Do similarities in trade patterns of GCC countries (UAE, KSA, Qatar, Bahrain, Kuwait, and Oman), which are geographically and politically alike and also enjoy oil income, affect the synchronization of their business cycles and make them have similar booms and busts? In this paper, we attempt to connect these two features and explore this question. Using various estimation methods (Common Corre...

Hydrodynamic synchronization of autonomously oscillating optically trapped particles.

Ellipsoidal micron-sized colloidal particles can oscillate spontaneously when trapped in a focused laser beam. If two oscillating particles are held in proximity their oscillations synchronize through hydrodynamic interactions. The degree of synchronization depends on the distance between the oscillators and on their orientation. Due to the anisotropic nature of hydrodynamic coupling the synchr...

Dynamics of self-assembled chaining in magnetorheological fluids.

The aggregation dynamics of paramagnetic spherical particles embedded in a viscous fluid is investigated via numerical simulations using a fully coupled three-dimensional model. Particles experience simultaneously Brownian motion, dipolar magnetic attraction, and multibody hydrodynamic interactions. When the dipole strength characterizing the ratio of magnetic attraction to random diffusion exc...