Active systems are driven out of equilibrium by exchanging energy and momentum with their
environment. This endows them with anomalous mechanical properties that are reviewed in …

Randomly moving active particles can be herded into directed motion by asymmetric
geometric structures. Although such a rectification process has been extensively studied due …

Chiral active particles (CAPs) are self-propelling particles that break time-reversal symmetry
by orbiting or spinning, leading to intriguing behaviors. Here, we examined the dynamics of …

It is known that obstacles can hydrodynamically trap bacteria and synthetic microswimmers
in orbits, where the trap** time heavily depends on the swimmer flow field and noise is …

Efficient exploration of space is a paramount motive for active colloids in practical
applications. Yet, introducing activity may lead to surface-bound states, hindering efficient …

Active propulsion, as performed by bacteria and Janus particles, in combination with
hydrodynamic interaction results in the accumulation of bacteria at a flat wall. However, in …

In living and synthetic active matter systems, the constituents can self-propel and interact
with each other and with the environment through various physicochemical mechanisms …

We numerically investigate the behaviors of a hydrodynamic squirmer interacting with a
circular obstacle using the lattice Boltzmann method. It is interesting to find that in most …

The motion of microorganisms in complex fluids stands out as a prominent subject within
fluid mechanics. In our study, we utilize the fictitious domain method to investigate the …