CFD simulations of gas–solid flow in an industrial-scale circulating fluidized bed furnace using subgrid-scale drag models

Shah, Srujal; Myöhänen, Kari; Kallio, Sirpa; Hyppänen, Timo

doi:10.1016/j.partic.2014.05.008

Cited by 40 publications

(19 citation statements)

References 34 publications

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“…The predicted value of time‐averaged solid flux from DDPM‐EMMS simulations is much closer to the experiment as compared to TFM‐EMMS. In the TFM‐EMMS approach, slightly higher solid flux is observed which is also reported in the literature, while the studies for solid flux results with the DDPM‐EMMS modelling approach are not reported in the literature and will be further discussed in future work.…”

Section: Resultsmentioning

confidence: 99%

Numerical simulation of a semi‐industrial scale CFB riser using coarse‐grained DDPM‐EMMS modelling

et al. 2017

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In this work, a coarse‐grained Dense Discrete Phase Model (DDPM) coupled with the Energy‐Minimization Multi‐Scale (EMMS) drag, was used to simulate the hydrodynamics of a 3D semi‐industrial scale Circulating Fluidized Bed (CFB) with Geldart A particles. The effect of particle numbers in a parcel, an important parameter in a coarse‐grained approach, was investigated. It was found that when parcel diameter falls into the size range of clusters, simulation results are insensitive to particle number in a parcel and generally agree with the experimental data. Further, a comparison between DDPM and Eulerian Two‐Fluid Modelling (TFM) approaches was investigated, both coupled with EMMS and conventional homogenous drag. The simulation results suggested that the effect of meso‐scale structures on drag force needs to be considered in both modelling approaches.

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Section: Resultsmentioning

confidence: 99%

Numerical simulation of a semi‐industrial scale CFB riser using coarse‐grained DDPM‐EMMS modelling

et al. 2017

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“…Drag function is given by (9). Where d C is drag coefficient which is modeled from Wen-Yu drag model (Shah et al, 2015) and R is particle radius. Expression for the isotropic solids stress has been taken from (Harris and Crighton, 1994) and shown in (10).…”

Section: Model Formulation and Methodology 21 Mathematical Modelmentioning

confidence: 99%

Prediction of Dilute Phase Pneumatic Conveying Characteristics using MP-PIC Method

Chandra

Ariyaratne

Melaaen

2018

Linköping Electronic Conference Proceedings

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Pneumatic conveying characteristics of a dilute phase flow in a circular horizontal pipe was predicted using MP-PIC method in OpenFOAM code. The geometry, material and operating conditions are similar to some experimental data in published literature. The pipe diameter is 30.5 mm. The solid particles are plastic pellets which are having 1000 kg/m 3 of density and 0.2 mm of particle diameter. The simulations were carried out for 10 m/s of superficial air velocity and for different solids mass loadings 0, 1, 2 and 3. The pressure drop, air velocity profiles and solids distribution were analysed and some of the results were compared with experimental data from the literature. The predicted pressure drops and air velocity profiles show a quite good agreement with the experimental data.

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“…[ 12 ] which has been future improved and extended by Myohanen [ 13 ] is semi-empirical model capable to model simplified real scale CFB boilers including hydrodynamics and combustion process. Some application of semi-empirical model can be found in works [ 14 – 18 ].…”

Section: Introductionmentioning

confidence: 99%

Application of the Numerical Techniques for Modelling Fluidization Process Within Industrial Scale Boilers

Adamczyk¹

2016

Arch Computat Methods Eng

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The numerical simulation of the large scale industrial circulating fluidized bed (CFB) boilers, working under air- and oxy-fuel combustion are presented in this paper. Moreover, two-dimensional experimental rig used for numerical model validation is described. For three-dimensional numerical simulations two industrial compact CFB boilers were selected installed in Polish Power Plants. Numerical simulations were carried out using three-dimensional model where the dense particulate transport phenomenon was simultaneously modelled with combustion process. The fluidization process was modelled using the hybrid Euler–Lagrange approach. Within the paper, readers can find information about used computational technique and a number of reference to specific work. The impact of radiative heat transfer on predicted temperature profile within the CFB boiler was investigated in presented work. Moreover, the novel model for retrieving radiative properties of gases under oxy-fuel combustion process was used. The evaluated temperature and pressure profiles during numerical simulations were compared against measured data collected during boiler air-fuel operation. Collected data was also used for validating numerical model of the oxy-fuel combustion model. Stability of the model and its sensitivity on changes of composition of the oxidizer were studied. This simulations were evaluated to check the response of the numerical model on changing the combustion conditions from air- to oxy-fuel combustion process. The comparison of the pressure and temperature profiles for all considered cases gave comparable trends in contrary to measured data.

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CFD simulations of gas–solid flow in an industrial-scale circulating fluidized bed furnace using subgrid-scale drag models

Cited by 40 publications

References 34 publications

Numerical simulation of a semi‐industrial scale CFB riser using coarse‐grained DDPM‐EMMS modelling

Numerical simulation of a semi‐industrial scale CFB riser using coarse‐grained DDPM‐EMMS modelling

Prediction of Dilute Phase Pneumatic Conveying Characteristics using MP-PIC Method

Application of the Numerical Techniques for Modelling Fluidization Process Within Industrial Scale Boilers

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