We analyze the case of run-and-tumble particles pushed through a rugged channel both in continuum and on lattice. The current characteristic is non-monotone external field with (1) appearance nontrivial density profile even at zero for asymmetric obstacles, (2) decreasing persistence small increasing large field. Activity terms self-propulsion increases maximal postpones dying. give an effectiv...

In this work, result of experimental investigation on interaction of fuel spray generated by a swirled type injector, with air motion in a prototype cylinder are presented. Experiments were carried out by planar imaging and particle image velocimetry (PIV) techniques in order to provide information about the spray structure evolution and instantaneous velocity distribution of air motion and ...

Abstract In this paper we extend the encounter-based model of diffusion-mediated surface absorption to case an unbiased run-and-tumble particle (RTP) confined a finite interval [0, L ] and switching between two constant velocity states ± v at rate α . The formalism is motivated by observation that various surface-based reactions are better modeled in terms reactivity function amount time spends...

We study a class of stochastic processes the type $\frac{d^n x}{dt^n}= v_0\, \sigma(t)$ where $n>0$ is positive integer and $\sigma(t)=\pm 1$ represents an `active' telegraphic noise that flips from one state to other with constant rate $\gamma$. For $n=1$, it reduces standard run tumble process for active particles in dimension. This can be analytically continued any including non-integer valu...

We study the statistical properties of a non-Markovian chiral run-and-tumble particle (CRTP) in two dimensions continuous space and time. In our model, possible orientations correspond to four cardinal directions. The can reorient by turning left, right or reversing its direction motion at different rates. show how chirality manifests itself transport like spatial moments marginal position dist...

We consider the tracer diffusion D(rr) that arises from the run-and-tumble motion of low Reynolds number swimmers, such as bacteria. Assuming a dilute suspension, where the bacteria move in uncorrelated runs of length λ, we obtain an exact expression for D(rr) for dipolar swimmers in three dimensions, hence explaining the surprising result that this is independent of λ. We compare D(rr) to the ...