Multiphysics Simulations of Entrained Flow Gasification. Part I: Validating the Nonreacting Flow Solver and the Particle Turbulent Dispersion Model

Handle URI:
http://hdl.handle.net/10754/598909
Title:
Multiphysics Simulations of Entrained Flow Gasification. Part I: Validating the Nonreacting Flow Solver and the Particle Turbulent Dispersion Model
Authors:
Kumar, Mayank; Ghoniem, Ahmed F.
Abstract:
In this two-part paper, we describe the construction, validation, and application of a multiscale model of entrained flow gasification. The accuracy of the model is demonstrated by (1) rigorously constructing and validating the key constituent submodels against relevant canonical test cases from the literature and (2) validating the integrated model against experimental data from laboratory scale and commercial scale gasifiers. In part I, the flow solver and particle turbulent dispersion models are validated against experimental data from nonswirling flow and swirling flow test cases in an axisymmetric sudden expansion geometry and a two-phase flow test case in a cylindrical bluff body geometry. Results show that while the large eddy simulation (LES) performs best among all tested models in predicting both swirling and nonswirling flows, the shear stress transport (SST) k-ω model is the best choice among the commonly used Reynolds-averaged Navier-Stokes (RANS) models. The particle turbulent dispersion model is accurate enough in predicting particle trajectories in complex turbulent flows when the underlying turbulent flow is well predicted. Moreover, a commonly used modeling constant in the particle dispersion model is optimized on the basis of comparisons with particle-phase experimental data for the two-phase flow bluff body case. © 2011 American Chemical Society.
Citation:
Kumar M, Ghoniem AF (2012) Multiphysics Simulations of Entrained Flow Gasification. Part I: Validating the Nonreacting Flow Solver and the Particle Turbulent Dispersion Model. Energy Fuels 26: 451–463. Available: http://dx.doi.org/10.1021/ef200884j.
Publisher:
American Chemical Society (ACS)
Journal:
Energy & Fuels
Issue Date:
19-Jan-2012
DOI:
10.1021/ef200884j
Type:
Article
ISSN:
0887-0624; 1520-5029
Sponsors:
This research is funded by the BP-MIT Conversion Research Program. M.K. was supported by MASDAR. The computational facilities were supported in part by KAUST.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorKumar, Mayanken
dc.contributor.authorGhoniem, Ahmed F.en
dc.date.accessioned2016-02-25T13:43:31Zen
dc.date.available2016-02-25T13:43:31Zen
dc.date.issued2012-01-19en
dc.identifier.citationKumar M, Ghoniem AF (2012) Multiphysics Simulations of Entrained Flow Gasification. Part I: Validating the Nonreacting Flow Solver and the Particle Turbulent Dispersion Model. Energy Fuels 26: 451–463. Available: http://dx.doi.org/10.1021/ef200884j.en
dc.identifier.issn0887-0624en
dc.identifier.issn1520-5029en
dc.identifier.doi10.1021/ef200884jen
dc.identifier.urihttp://hdl.handle.net/10754/598909en
dc.description.abstractIn this two-part paper, we describe the construction, validation, and application of a multiscale model of entrained flow gasification. The accuracy of the model is demonstrated by (1) rigorously constructing and validating the key constituent submodels against relevant canonical test cases from the literature and (2) validating the integrated model against experimental data from laboratory scale and commercial scale gasifiers. In part I, the flow solver and particle turbulent dispersion models are validated against experimental data from nonswirling flow and swirling flow test cases in an axisymmetric sudden expansion geometry and a two-phase flow test case in a cylindrical bluff body geometry. Results show that while the large eddy simulation (LES) performs best among all tested models in predicting both swirling and nonswirling flows, the shear stress transport (SST) k-ω model is the best choice among the commonly used Reynolds-averaged Navier-Stokes (RANS) models. The particle turbulent dispersion model is accurate enough in predicting particle trajectories in complex turbulent flows when the underlying turbulent flow is well predicted. Moreover, a commonly used modeling constant in the particle dispersion model is optimized on the basis of comparisons with particle-phase experimental data for the two-phase flow bluff body case. © 2011 American Chemical Society.en
dc.description.sponsorshipThis research is funded by the BP-MIT Conversion Research Program. M.K. was supported by MASDAR. The computational facilities were supported in part by KAUST.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleMultiphysics Simulations of Entrained Flow Gasification. Part I: Validating the Nonreacting Flow Solver and the Particle Turbulent Dispersion Modelen
dc.typeArticleen
dc.identifier.journalEnergy & Fuelsen
dc.contributor.institutionMassachusetts Institute of Technology, Cambridge, United Statesen
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