Journal ArticleDOI
Dynamics of Dusty Gases
TLDR
In this paper, a review dealing with a certain restricted portion of the mechanics of heterogeneous media is presented, where the problem of detailed transport processes between particles and gas may be treated independently of the complete dynamical problem, and this aspect, being a study of its own, will be suppressed to a considerable extent.Abstract:
This review deals with a certain restricted portion of the mechanics of heterogeneous media. The volume fraction of the solid-particle or droplet cloud is considered to be so small that the interaction between individual particles may be neglected or highly simplified. This limitation applies to the individual flow fields about the particles as well as to collisions, and to heat and mass transfer as well as to momentum exchange between phases. Under this circumstance, the problem of detailed transport processes between particles and gas may be treated independently of the complete dynamical problem, and this aspect, being a study of its own, will be suppressed to a considerable extent here. There are problems, such as the impact
of particles on walls, the concentration separation in boundary layers or pipe flow, in which the distortion of the particle flow field due to a solid wall or another particle is the central physical issue. These problems therefore lie outside the scope of the review. On the other hand, the structure of shock waves, sound attenuation, and many flow-field problems can be treated within our present restrictions. The basic equations and exchange processes will be introduced first, together with the physical parameters that indicate the relative importance of the particle cloud and the limitations of the dusty-gas concept. Then several different problems will be discussed that lead to some of the significant results in the field and illustrate analytical techniques that have proven useful.read more
Citations
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Journal ArticleDOI
Turbulent Dispersed Multiphase Flow
S. Balachandar,John K. Eaton +1 more
TL;DR: A review of the current state-of-the-art experimental and computational techniques for turbulent dispersed multiphase flows, their strengths and limitations, and opportunities for the future can be found in this paper.
Journal ArticleDOI
Acceleration of rain initiation by cloud turbulence
TL;DR: It is concluded that air turbulence can substantially accelerate the appearance of large droplets that trigger rain.
Journal ArticleDOI
Numerical models of Plinian eruption columns and pyroclastic flows
TL;DR: In this paper, numerical simulations of the large-scale dynamics of Plinian eruption columns reveal conditions contributing to column collapse and emplacement of pyroclastic flows, and the dynamics and particle behavior in the proximal zone around collapsing eruption columns are examined.
Journal ArticleDOI
A fast Eulerian method for disperse two-phase flow
Jim Ferry,S. Balachandar +1 more
TL;DR: In this paper, a variant of the Eulerian method for two-phase flow that is valid for small particle response time τ is proposed. But it is not suitable for the case of turbophoresis.
Journal ArticleDOI
Fundamentals of fluid motion in erosion by solid particle impact
TL;DR: A review of the literature on material erosion by solid-particle impact can be found in this paper, where several fundamental considerations relating to the motion of solid particles conditioned by the presence of a carrier fluid, neighboring particles, and a constraining solid surface are discussed.
References
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DissertationDOI
Particle fluid mechanics in shear flows, acoustic waves, and shock waves
TL;DR: In this paper, a numerical solution is obtained for a fluid containing small particles flowing over an infinite disc rotating at a constant angular velocity, which is a boundary layer type flow, and the boundary layer thickness for the mixture is estimated.