CFD-DEM Evaluation of the Clustering Behavior in a Riser─the Effect of the Drag Force Model

Juan Ramirez, Martijn de Munck, Zhitao Liu, David Rieder, Maike Baltussen (Corresponding author), Kay Buist, Johannes A.M. Kuipers

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

5 Citaten (Scopus)
42 Downloads (Pure)

Samenvatting

Riser reactors are frequently applied in catalytic processes involving rapid catalyst deactivation. Typically heterogeneous flow structures prevail because of the clustering of particles, which impacts the quality of the gas–solid contact. This phenomenon results as a competition between fluid–particle interaction (i.e., drag) and particle–particle interaction (i.e., collisions). In this study, five drag force correlations were used in a combined computational fluid dynamics–discrete element method Immersed Boundary Model to predict the clustering. The simulation results were compared with experimental data obtained from a pseudo-2D riser in the fast fluidization regime. The clusters were detected on the basis of a core–wake approach using constant thresholds. Although good predictions for the global (solids volume fraction and mass flux) variables and cluster (spatial distribution, size, and number of clusters) variables were obtained with two of the approaches in most of the simulations, all the correlations show significant deviations in the onset of a pneumatic transport regime. However, the correlations of Felice ( Int. J. Multiphase Flow 1994, 20, 153−159) and Tang et al. [ AIChE J. 2015, 61 (2), 688−698] show the closest correspondence for the time-averaged quantities and the clustering behavior in the fast fluidization regime.
Originele taal-2Engels
Pagina's (van-tot)18960-18972
Aantal pagina's13
TijdschriftIndustrial and Engineering Chemistry Research
Volume62
Nummer van het tijdschrift45
Vroegere onlinedatum30 mei 2023
DOI's
StatusGepubliceerd - 15 nov. 2023

Financiering

This work was supported by The Netherlands Center for Multiscale Catalytic Energy Conversion (MCEC), an NWO Gravitation programme funded by the Ministry of Education, Culture and Science of the government of The Netherlands. Special thanks to C. Garcia Llamas for the help in implementation of the mappings from the Eulerian grid to the Lagrangian points and vice versa.

FinanciersFinanciernummer
Netherlands Center for Multiscale Catalytic Energy Conversion
Ministerie van OCW
Nederlandse Organisatie voor Wetenschappelijk Onderzoek

    Vingerafdruk

    Duik in de onderzoeksthema's van 'CFD-DEM Evaluation of the Clustering Behavior in a Riser─the Effect of the Drag Force Model'. Samen vormen ze een unieke vingerafdruk.

    Citeer dit