Investigation of the influence of frictional viscosity regularization on quasi-static gas-solid flow predictions in a conical spouted bed with non-porous draft tube
Abstract
The stress in the quasi-static particle flow is often modeled through the Mohr-Coulomb failure criterion. In the extension to complex three-dimensional flows, a granular viscosity is introduced through a tensorial rheology and the deviatoric frictional stress tensor is assumed aligned with the strain rate tensor. This granular viscosity is singular as the shear rate approaches zero, regardless of the local rheology. We discuss the influence of regularizing such a frictional viscosity on the particle circulation rate and other measured characteristics in a laboratory scale draft tube spouted bed. Here, the friction between particles is modeled either with a constant Coulomb rheology or using a local particle pressure and strain-rate based friction known as μ(I)-rheology. The predictions appear very dependent on the regularization parameter introduced by the method. The mean properties of the flow (e.g. circulation and pressure drop) monotonically converge towards the measurements when the regularization parameter tends to zero. In other respects, the two regularization models regarded in this study induced similar hydrodynamics within the spouted bed of interest. But the analysis of the conditional averages of the inertial number and the fraction of the solids in the quasi-static regime shows that the extent and staticity of the quasi-staticmore »
- Authors:
-
- National Energy Technology Lab. (NETL), Morgantown, WV (United States); West Virginia Univ., Morgantown, WV (United States)
- National Energy Technology Lab. (NETL), Morgantown, WV (United States)
- Publication Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
- Sponsoring Org.:
- FE; USDOE
- OSTI Identifier:
- 1509703
- Report Number(s):
- NETL-PUB-22321
Journal ID: ISSN 0921-8831
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Powder Technology
- Additional Journal Information:
- Journal Volume: 29; Journal Issue: 12; Journal ID: ISSN 0921-8831
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Konan, N’dri A., and Huckaby, E. David. Investigation of the influence of frictional viscosity regularization on quasi-static gas-solid flow predictions in a conical spouted bed with non-porous draft tube. United States: N. p., 2018.
Web. doi:10.1016/j.apt.2018.09.005.
Konan, N’dri A., & Huckaby, E. David. Investigation of the influence of frictional viscosity regularization on quasi-static gas-solid flow predictions in a conical spouted bed with non-porous draft tube. United States. https://doi.org/10.1016/j.apt.2018.09.005
Konan, N’dri A., and Huckaby, E. David. Tue .
"Investigation of the influence of frictional viscosity regularization on quasi-static gas-solid flow predictions in a conical spouted bed with non-porous draft tube". United States. https://doi.org/10.1016/j.apt.2018.09.005. https://www.osti.gov/servlets/purl/1509703.
@article{osti_1509703,
title = {Investigation of the influence of frictional viscosity regularization on quasi-static gas-solid flow predictions in a conical spouted bed with non-porous draft tube},
author = {Konan, N’dri A. and Huckaby, E. David},
abstractNote = {The stress in the quasi-static particle flow is often modeled through the Mohr-Coulomb failure criterion. In the extension to complex three-dimensional flows, a granular viscosity is introduced through a tensorial rheology and the deviatoric frictional stress tensor is assumed aligned with the strain rate tensor. This granular viscosity is singular as the shear rate approaches zero, regardless of the local rheology. We discuss the influence of regularizing such a frictional viscosity on the particle circulation rate and other measured characteristics in a laboratory scale draft tube spouted bed. Here, the friction between particles is modeled either with a constant Coulomb rheology or using a local particle pressure and strain-rate based friction known as μ(I)-rheology. The predictions appear very dependent on the regularization parameter introduced by the method. The mean properties of the flow (e.g. circulation and pressure drop) monotonically converge towards the measurements when the regularization parameter tends to zero. In other respects, the two regularization models regarded in this study induced similar hydrodynamics within the spouted bed of interest. But the analysis of the conditional averages of the inertial number and the fraction of the solids in the quasi-static regime shows that the extent and staticity of the quasi-static region is sensitive to changes to the regularization parameter or regularization function.},
doi = {10.1016/j.apt.2018.09.005},
journal = {Advanced Powder Technology},
number = 12,
volume = 29,
place = {United States},
year = {Tue Sep 18 00:00:00 EDT 2018},
month = {Tue Sep 18 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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