Compaction and dilation rate dependence of stresses in gas-fluidized beds

Details Compaction and dilation rate dependence of stresses in gas-fluidized beds Compaction and dilation rate dependence of stresses in gas-fluidized beds

2006-02-06

arxiv.org/abs/cond-mat/0602156v2

Phys. Fluids 18, 083304 (2006) (14 pages)

Physics

Condensed Matter

Soft Condensed Matter

accepted for publication in Physics of Fluids (Burnett-order effect analysis added)

Scientific paper

10.1063/1.2338597

A particle dynamics-based hybrid model, consisting of monodisperse spherical solid particles and volume-averaged gas hydrodynamics, is used to study traveling planar waves (one-dimensional traveling waves) of voids formed in gas-fluidized beds of narrow cross sectional areas. Through ensemble-averaging in a co-traveling frame, we compute solid phase continuum variables (local volume fraction, average velocity, stress tensor, and granular temperature) across the waves, and examine the relations among them. We probe the consistency between such computationally obtained relations and constitutive models in the kinetic theory for granular materials which are widely used in the two-fluid modeling approach to fluidized beds. We demonstrate that solid phase continuum variables exhibit appreciable ``path dependence'', which is not captured by the commonly used kinetic theory-based models. We show that this path dependence is associated with the large rates of dilation and compaction that occur in the wave. We also examine the relations among solid phase continuum variables in beds of cohesive particles, which yield the same path dependence. Our results both for beds of cohesive and non-cohesive particles suggest that path-dependent constitutive models need to be developed.

Affiliated with

Also associated with

No associations

Rating

Compaction and dilation rate dependence of stresses in gas-fluidized beds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Compaction and dilation rate dependence of stresses in gas-fluidized beds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compaction and dilation rate dependence of stresses in gas-fluidized beds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-62850