Coarse grain 3D CFD-DEM simulation and validation with capacitance probe measurements in a circulating fluidized bed

Stroh, Alexander; Daikeler, Alexander; Nikku, Markku; May, Jan; Alobaid, Falah; Bohnstein, Maximilian von; Ströhle, Jochen; Epple, Bernd

doi:10.1016/j.ces.2018.11.052

Cited by 36 publications

(11 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The drag coefficient β is calculated using the diameter of the real physical particles. The derivations and validations of this CG approach are available in literature …”

Section: Numerical Models and Simulation Parametersmentioning

confidence: 99%

Experimental and numerical investigation of sands and Geldart A biomass co‐fluidization

Gao

et al. 2020

AIChE Journal

View full text Add to dashboard Cite

This article investigated the fluidization of sands and small Geldart A biomass mixtures. The mixture fluidized like Geldart A type particles with a uniform bed expansion regime before bubbling. The video recorded color distance between pure sands and sands-biomass mixtures was used to estimate the sands-biomass mixing. The coarse-grained computational fluid dynamics-discrete element method with a hybrid drag model which couples the Syamlal-O'Brien drag and a filtered drag can capture the mixing while the simulation with Gidaspow drag predicted a segregated bed. The simulations were further validated with experimental measured pressure drops. The time averaged pressure drop equals the weight of the bed material, however, its fluctuation is about three times of the bed material fluctuation. K E Y W O R D S biomass, coarse-grained CFD-DEM, drag model, filtered model, fluidized bed

show abstract

“…The drag coefficient β is calculated using the diameter of the real physical particles. The derivations and validations of this CG approach are available in literature …”

Section: Numerical Models and Simulation Parametersmentioning

confidence: 99%

Experimental and numerical investigation of sands and Geldart A biomass co‐fluidization

Gao

et al. 2020

AIChE Journal

View full text Add to dashboard Cite

show abstract

“…At present, application of the DEM-CFD method to industrial fluidized beds (Sakai, 2016;C. Hu et al, 2019;Ge et al, 2019;Stroh et al, 2019) is among the important research topics. Not the shape of industrial fluidized beds is always simple, though rectangular systems have been employed in the existing fluidized bed simulations.…”

Section: Industrial Fluidized Bedmentioning

confidence: 99%

Recent Progress on Mesh-free Particle Methods for Simulations of Multi-phase Flows: A Review

Sakai

Mori

Sun

et al. 2020

KONA

View full text Add to dashboard Cite

The discrete element method (DEM) and the moving particle semi-implicit (MPS) method are the most popular mesh-free particle methods in the discontinuum and continuum. This paper describes a state-of-the-art modeling on multi-phase flows using these mesh-free particle methods. Herein, a combinational model of the signed distance function (SDF) and immersed boundary method (IBM) is introduced for an arbitrary-shaped wall boundary in the DEM simulation. Practically, this model uses a simple operation to create the wall boundary. Although the SDF is a scalar field for the wall boundary of the DEM, it is useful for the wall boundary of the CFD through combination with the IBM. Validation tests are carried out to demonstrate the adequacy of the SDF/IBM wall boundary model. Regarding the mesh-free particle method for continuum, the phase change problem is one of the challenging topics, as the solid state is usually modeled by extremely high viscous fluid in the phase change simulation. The phase change simulation is shown to be efficiently performed through an implicit algorithm and a heat flux model in the MPS method. The adequacy of these models is verified by the numerical examples.

show abstract

“…Es wurden drei unterschiedliche Fluidisierungsgeschwindigkeiten (2,7 m s −1 , 2,3 m s −1 und 1,9 m s −1 ) untersucht, wobei Luft als Fluidisierungsmedium verwendet wurde. Ausführliche Versuchsergebnisse wurden bereits veröffentlicht , , außerdem wurden Euler‐Euler‐Simulationen durchgeführt, die ebenfalls veröffentlicht wurden .…”

Section: Simulation Einer Kalten Zirkulierenden Wirbelschichtunclassified

“…Es wurden drei unterschiedliche Fluidisierungsgeschwindigkeiten (2,7 m s -1 , 2,3 m s -1 und 1,9 m s -1 ) untersucht, wobei Luft als Fluidisierungsmedium verwendet wurde. Ausführliche Versuchsergebnisse wurden bereits veröffentlicht[18,19], außerdem wurden Euler-Euler-Simulationen durchgeführt, die ebenfalls veröffentlicht wurden[20].Als Bettmaterial wurden Sandpartikel mit einer Dichte von 2647 kg m -3 verwendet. Eine Partikelgrößenverteilung wurde gemessen, wobei der Durchmesser der Sandpartikel im Bereich von 50-300 mm lag.…”

unclassified

Euler‐Lagrange‐Modell zur Simulation des Carbonate‐Looping‐Prozesses

May

Alobaid

Stroh

et al. 2020

Chemie Ingenieur Technik

Self Cite

View full text Add to dashboard Cite

Es existieren bereits umfangreiche experimentelle Untersuchungen zum Carbonate-Looping-Prozess (CaL) in Bezug auf Prozessdesign und -entwicklung. Die wenigen numerischen Arbeiten beruhen hauptsächlich auf Lösung der 1D-Bilanzgleichungen oder der Bestimmung von Gleichgewichtszuständen. Für eine genaue Prozessbeschreibung sind jedoch anspruchsvollere Ansätze erforderlich. Daher wurde ein dreidimensionales, transientes CFD-DEM-Modell für die Simulation im MW th -Maßstab entwickelt. Zur Modellentwicklung und Validierung wurden experimentelle Daten einer 1-MW th -Pilotanlage, einem maßstabsverkleinerten kalten Modell und einer Quasi-2D-Laborwirbelschicht verwendet. Die numerischen Ergebnisse stimmen gut mit den Messungen überein und zeigen die Eignung des Modells.Considerable experimental research has been already carried out on carbonate looping with respect to process design and development. By contrast, few numerical works that are mostly based on one-dimensional or equilibrium-state are available. However, for a precise description of these processes, more sophisticated approaches are required. Therefore, a three-dimensional transient CFD-DEM model has been developed for the simulation of the carbonate looping process at MW th scale. Sets of experimental data obtained from a 1-MW th pilot plant, a downscaled 3D-cold flow model and a quasi 2D laboratory fluidized bed are applied for model validation. The numerical results are in good agreement with the measurements and proof the applicability of the model.

show abstract

Coarse grain 3D CFD-DEM simulation and validation with capacitance probe measurements in a circulating fluidized bed

Cited by 36 publications

References 45 publications

Experimental and numerical investigation of sands and Geldart A biomass co‐fluidization

Experimental and numerical investigation of sands and Geldart A biomass co‐fluidization

Recent Progress on Mesh-free Particle Methods for Simulations of Multi-phase Flows: A Review

Euler‐Lagrange‐Modell zur Simulation des Carbonate‐Looping‐Prozesses

Contact Info

Product

Resources

About