Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Continuum prediction of scale-dependent, anisotropic fluctuating kinetic energy in gas-solid flows

Journal Article · · Chemical Engineering Science
 [1];  [2]
  1. Univ. of Colorado, Boulder, CO (United States); National Energy Technology Laboratory (NETL), Morgantown, WV (United States); Univ of CO
  2. Univ. of Colorado, Boulder, CO (United States)
+ Show Author Affiliations

This note highlights the subtle difference between two measures of fluctuating kinetic energy of the particulate phase in gas-solids flow. One measure arises from kinetic theory, here identified as granular temperature (T), and a second measure resulting from a spatial average, here denoted j. Somewhat surprisingly, continuum models derived from a kinetic theory considering a single, scalar granular temperature, which is further assumed to be isotropic, is still able to predict anisotropic spatially averaged fluctuating kinetic energies. Furthermore, the scale dependence of the spatially averaged can also be extracted. As a result, comparisons of the continuum predictions to recent direct numerical data are striking, particularly for larger averaging volumes.

Research Organization:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FE0026298
OSTI ID:
1832982
Alternate ID(s):
OSTI ID: 1691828
Journal Information:
Chemical Engineering Science, Journal Name: Chemical Engineering Science Vol. 186; ISSN 0009-2509
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (18)

Filtered two-fluid models for fluidized gas-particle suspensions journal January 2008
Meso-scale statistical properties of gas-solid flow-a direct numerical simulation (DNS) study journal September 2016
Verification of Eulerian-Eulerian and Eulerian-Lagrangian simulations for turbulent fluid-particle flows journal September 2017
High-resolution Eulerian simulation of RMS of solid volume fraction fluctuation and particle clustering characteristics in a CFB riser journal July 2008
A new method for decomposition of high speed particle image velocimetry data journal April 2012
Open-source MFIX-DEM software for gas–solids flows: Part I—Verification studies journal April 2012
Effects of granular temperature on inter-phase drag in gas-solid flows journal November 2017
The role of meso-scale structures in rapid gas–solid flows journal October 2001
Enskog kinetic theory for monodisperse gas–solid flows journal September 2012
Impact of collisional versus viscous dissipation on flow instabilities in gas–solid systems journal June 2013
Kinetic-theory predictions of clustering instabilities in granular flows: beyond the small-Knudsen-number regime journal December 2013
On multiphase turbulence models for collisional fluid–particle flows journal February 2014
On fluid–particle dynamics in fully developed cluster-induced turbulence journal September 2015
Clustering instabilities in sedimenting fluid–solid systems: critical assessment of kinetic-theory-based predictions using direct numerical simulation data journal June 2017
Measurement of Two Kinds of Granular Temperatures, Stresses, and Dispersion in Bubbling Beds journal March 2005
Particle clustering due to hydrodynamic interactions journal May 2000
Large-Eddy-Simulation Tools for Multiphase Flows journal January 2012
R APID G RANULAR F LOWS journal January 2003

Cited By (1)

How to generate valid local quantities of particle–fluid flows for establishing constitutive relations journal June 2019

Similar Records

The Homogeneous Cooling State as a Verification Test for Kinetic Theory-Based Continuum Models of Gas–Solid Flows
Journal Article · Wed Jan 24 23:00:00 EST 2018 · Journal of Verification, Validation and Uncertainty Quantification · OSTI ID:1832981
Are continuum predictions of clustering chaotic?
Journal Article · Tue Feb 28 23:00:00 EST 2017 · Chaos: An Interdisciplinary Journal of Nonlinear Science · OSTI ID:1465353
Study of the ability of multiphase continuum models to predict core-annulus flow
Journal Article · Mon Oct 01 00:00:00 EDT 2007 · AIChE Journal (Online) · OSTI ID:923665

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
GTSH
Granular temperature
MFiX
Two-fluid model