Propagation of hydrodynamic interactions between particles in a compressible fluid
| Autor: | Rei Tatsumi, Ryoichi Yamamoto |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Diffusion (acoustics)
numerical analysis Computational Mechanics Direct numerical simulation FOS: Physical sciences computational fluid dynamics Condensed Matter - Soft Condensed Matter Computational fluid dynamics Compressible flow Physics::Fluid Dynamics Speed of sound acoustic wave propagation compressible flow Fluid Flow and Transfer Processes Physics business.industry Mechanical Engineering diffusion Fluid Dynamics (physics.flu-dyn) Particle-laden flows Physics - Fluid Dynamics Mechanics Condensed Matter Physics two-phase flow Mechanics of Materials hydrodynamics viscosity compressibility Compressibility Soft Condensed Matter (cond-mat.soft) flow simulation Two-phase flow business |
| Zdroj: | Physics of Fluids. 25:046101 |
| ISSN: | 1089-7666 1070-6631 |
| Popis: | Hydrodynamic interactions are transmitted by viscous diffusion and sound propagation: the temporal evolution of hydrodynamic interactions by both mechanisms is studied by direct numerical simulation in this paper. The hydrodynamic interactions for a system of two particles in a fluid are estimated by the velocity correlation of the particles. In an incompressible fluid, hydrodynamic interactions propagate instantaneously at the infinite speed of sound, followed by the temporal evolution of viscous diffusion. On the other hand, in a compressible fluid, sound propagates at a finite speed, which affects the temporal evolution of the hydrodynamic interactions by the order of magnitude relation between the time scales of viscous diffusion and sound propagation. The hydrodynamic interactions are characterized by introducing the ratio of these time scales as an interactive compressibility factor. Comment: 12 pages, 8 figures |
| Databáze: | OpenAIRE |
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