Flow pattern in the vicinity of self-propelling hot Janus particles
arXiv:1401.7311 · doi:10.1103/PhysRevE.88.012301
Abstract
We study the temperature field and the resulting flow pattern in the vicinity of a heated metal-capped Janus particle. If its thickness exceeds about 10 nm, the cap forms an isotherm and the flow pattern comprises a quadrupolar term that decays with the square of the inverse distance 1/r^2. For much thinner caps the velocity varies as 1/r^3. These findings could be relevant for collective effects in dense suspensions and for the circular tracer motion observed recently in the vicinity of a tethered Janus particle.
5 pages, 5 figures
References in corpus (5)
Cited by in corpus (49)
- Emergent behavior in active colloids
- Phototaxis of synthetic microswimmers in optical landscapes
- Phoretic self-propulsion at finite Péclet numbers
- Marangoni flow at droplet interfaces: Three-dimensional solution and applications
- Active Particles Bound by Information Flows
- Phoretic Interactions Generically Induce Dynamic Clusters and Wave Patterns in Active Colloids
- Polarization of active Janus particles
- Tuning the motility and directionality of self-propelled colloids
- Which Interactions Dominate in Active Colloids?
- Hydrodynamic interaction of a self-propelling particle with a wall: Comparison between an active Janus particle and a squirmer model
- Rectification and diffusion of self-propelled particles in a two-dimensional corrugated channel
- Microscale Marangoni Surfers
- Geometric tuning of self-propulsion for Janus catalytic particles
- Thermally driven Marangoni surfers
- Self-diffusiophoresis of Janus particles in near-critical mixtures
- Hot Microswimmers
- Self-propulsion mechanism of active Janus particles in near-critical binary mixtures
- Lattice-Boltzmann Hydrodynamics of Anisotropic Active Matter
- Interactions in Active Colloids
- Hydrodynamic assembly of active colloids: chiral spinners and dynamic crystals
- Transport of active ellipsoidal particles in ratchet potentials
- Entropic Ratchet transport of interacting active Brownian particles
- Active Brownian motion of emulsion droplets: Coarsening dynamics at the interface and rotational diffusion
- Nanoscale Seebeck effect at hot metal nanostructures
- Microscopic and continuum descriptions of Janus motor fluid flow fields
- Effect of fluid-colloid interactions on the mobility of a thermophoretic microswimmer in non-ideal fluids
- Microtransformers: controlled microscale navigation with flexible robots
- Solvent coarsening around colloids driven by temperature gradients
- Chemically active colloids near osmotic-responsive walls with surface-chemistry gradients
- Thermo-osmotic slip flows around a thermophoretic microparticle characterized by optical trapping of tracers
- Flow properties and hydrodynamic interactions of rigid spherical microswimmers
- Thermophoresis of Janus particles at large Knudsen numbers
- Hydrodynamic response of a surfactant-laden interface to a radial flow
- Universal optimal geometry of minimal phoretic pumps
- Steering a thermally activated micromotor with a nearby isothermal wall
- The stochastic motion of self-thermophoretic Janus particles
- Brownian Thermometry Beyond Equilibrium
- Unsteady and inertial dynamics of an active particle in a fluid
- Linear and angular motion of self-diffusiophoretic Janus particles
- Orientational dynamics of a heated Janus particle
- Particle motion driven by non-uniform thermodynamic forces
- Diffusion dynamics of an overdamped active ellipsoidal particle in two dimensions
- Emergence of oscillatory states of self-propelled colloids under optical confinement
- Rotational motion of dimers of Janus particles
- Coarse Graining Nonisothermal Microswimmer Suspensions
- Effective squirmer models for self-phoretic chemically active spherical colloids
- Efficient Optical Manipulation of Janus Particles by Optical Nanofibers
- The autophoretic torus
- Delayed Active Swimmer in a Velocity Landscape