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Title: Development, Verification, and Validation of Multiphase Models for Polydisperse Flows

Abstract

This report describes in detail the technical findings of the DOE Award entitled 'Development, Verification, and Validation of Multiphase Models for Polydisperse Flows.' The focus was on high-velocity, gas-solid flows with a range of particle sizes. A complete mathematical model was developed based on first principles and incorporated into MFIX. The solid-phase description took two forms: the Kinetic Theory of Granular Flows (KTGF) and Discrete Quadrature Method of Moments (DQMOM). The gas-solid drag law for polydisperse flows was developed over a range of flow conditions using Discrete Numerical Simulations (DNS). These models were verified via examination of a range of limiting cases and comparison with Discrete Element Method (DEM) data. Validation took the form of comparison with both DEM and experimental data. Experiments were conducted in three separate circulating fluidized beds (CFB's), with emphasis on the riser section. Measurements included bulk quantities like pressure drop and elutriation, as well as axial and radial measurements of bubble characteristics, cluster characteristics, solids flux, and differential pressure drops (axial only). Monodisperse systems were compared to their binary and continuous particle size distribution (PSD) counterparts. The continuous distributions examined included Gaussian, lognormal, and NETL-provided data for a coal gasifier.

Authors:
; ; ; ;
Publication Date:
Research Org.:
University Of Colorado
Sponsoring Org.:
USDOE
OSTI Identifier:
1039998
DOE Contract Number:  
FC26-07NT43098
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; BUBBLES; CIRCULATING SYSTEMS; COAL; DISTRIBUTION; ELUTRIATION; FLUIDIZED BEDS; KINETICS; MATHEMATICAL MODELS; PARTICLE SIZE; PRESSURE DROP; QUADRATURES; VALIDATION; VERIFICATION

Citation Formats

Hrenya, Christine, Cocco, Ray, Fox, Rodney, Subramaniam, Shankar, and Sundaresan, Sankaran. Development, Verification, and Validation of Multiphase Models for Polydisperse Flows. United States: N. p., 2011. Web. doi:10.2172/1039998.
Hrenya, Christine, Cocco, Ray, Fox, Rodney, Subramaniam, Shankar, & Sundaresan, Sankaran. Development, Verification, and Validation of Multiphase Models for Polydisperse Flows. United States. https://doi.org/10.2172/1039998
Hrenya, Christine, Cocco, Ray, Fox, Rodney, Subramaniam, Shankar, and Sundaresan, Sankaran. 2011. "Development, Verification, and Validation of Multiphase Models for Polydisperse Flows". United States. https://doi.org/10.2172/1039998. https://www.osti.gov/servlets/purl/1039998.
@article{osti_1039998,
title = {Development, Verification, and Validation of Multiphase Models for Polydisperse Flows},
author = {Hrenya, Christine and Cocco, Ray and Fox, Rodney and Subramaniam, Shankar and Sundaresan, Sankaran},
abstractNote = {This report describes in detail the technical findings of the DOE Award entitled 'Development, Verification, and Validation of Multiphase Models for Polydisperse Flows.' The focus was on high-velocity, gas-solid flows with a range of particle sizes. A complete mathematical model was developed based on first principles and incorporated into MFIX. The solid-phase description took two forms: the Kinetic Theory of Granular Flows (KTGF) and Discrete Quadrature Method of Moments (DQMOM). The gas-solid drag law for polydisperse flows was developed over a range of flow conditions using Discrete Numerical Simulations (DNS). These models were verified via examination of a range of limiting cases and comparison with Discrete Element Method (DEM) data. Validation took the form of comparison with both DEM and experimental data. Experiments were conducted in three separate circulating fluidized beds (CFB's), with emphasis on the riser section. Measurements included bulk quantities like pressure drop and elutriation, as well as axial and radial measurements of bubble characteristics, cluster characteristics, solids flux, and differential pressure drops (axial only). Monodisperse systems were compared to their binary and continuous particle size distribution (PSD) counterparts. The continuous distributions examined included Gaussian, lognormal, and NETL-provided data for a coal gasifier.},
doi = {10.2172/1039998},
url = {https://www.osti.gov/biblio/1039998}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Dec 31 00:00:00 EST 2011},
month = {Sat Dec 31 00:00:00 EST 2011}
}