Sound Propagation in Suspensions of Colloidal Spheres with Viscous Coupling

Riese, D.O.; Wegdam, G.H.

doi:10.1103/physrevlett.82.1676

Cited by 25 publications

(24 citation statements)

References 15 publications

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“…The benefit of this minimally resolved particle model is that although it has a very low computational cost, it naturally includes the relevant nonlinear hydrodynamic interactions between particles: mutual hydrodynamic friction, history forces [46], convective effects, and secondary forces. Interesting nontrivial effects such as changes in the wave pattern due to multiple scattering [48] or sound absorption by colloids or bubbles [36,57] can also be simulated [58]. The code [59] has been written in CUDA and efficiently runs on graphical processor units (GPUs); we have verified that simulations with O(10 4 ) particles over the colloidal diffusive scale are feasible in affordable computational times.…”

Section: Discussionmentioning

confidence: 96%

Minimal model for acoustic forces on Brownian particles

Usabiaga

Delgado‐Buscalioni

2013

Phys. Rev. E

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We present a generalization of inertial coupling (IC) [Balboa Usabiaga et al., J. Comput. Phys. 235, 701 (2013)], which permits the resolution of radiation forces on small particles with arbitrary acoustic contrast factor. The IC method is based on a Eulerian-Lagrangian approach: particles move in continuum space while the fluid equations are solved in a regular mesh (here we use the finite volume method). Thermal fluctuations in the fluid stress, important below the micron scale, are also taken into account following the Landau-Lifshitz fluid description. Each particle is described by a minimal cost resolution which consists of a single small kernel (bell-shaped function) concomitant to the particle. The main role of the particle kernel is to interpolate fluid properties and spread particle forces. Here, we extend the kernel functionality to allow for an arbitrary particle compressibility. The particle-fluid force is obtained from an imposed "no-slip" constraint which enforces similar particle and kernel fluid velocities. This coupling is instantaneous and permits the capture of the fast, nonlinear effects underlying the radiation forces on particles. Acoustic forces arise because of an excess either in particle compressibility (monopolar term) or in mass (dipolar contribution) over the fluid values. Comparison with theoretical expressions shows that the present generalization of the IC method correctly reproduces both contributions. Due to its low computational cost, the present method allows for simulations with many [O(10 4 )] particles using a standard graphical processor unit.

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Section: Discussionmentioning

confidence: 96%

Minimal model for acoustic forces on Brownian particles

Usabiaga

Delgado‐Buscalioni

2013

Phys. Rev. E

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“…In view of the considerable activity relating to phononic crystals of spherical bodies especially in relation to the elastodynamic response of thin slabs [31][32][33], locally resonant sonic materials [34,35], ultrasound tunneling [36], design of acoustic lenses [37], phononic crystals with many scatterers per unit cell [38], colloidal crystals [39,40], etc., we believe that the presentation of this program is timely and, hopefully, useful in further exploration of the possibilities of phononic crystals and of heterostructures of such.…”

Section: Introductionmentioning

confidence: 99%

A layer-multiple-scattering method for phononic crystals and heterostructures of such

Sainidou¹,

Stéfanou²,

Psarobas³

et al. 2005

Computer Physics Communications

125

135

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“…Lindsay and Chaikin [12], and Hurd et al [13] studied the dispersion of sound modes sustained by the combined system of particles and suspension liquid in colloidal crystals, and recently Riese and Wegdam demonstrated the importance of viscous coupling between particles [14]. The excursions of particles from their lattice sites are directly related to the lattice dynamics.…”

Section: Particle Excursions In Colloidal Crystalsmentioning

confidence: 99%