Modeling of particle transport and combustion phenomena in a large-scale circulating fluidized bed boiler using a hybrid Euler–Lagrange approach

Adamczyk, Wojciech; Węcel, Gabriel; Klajny, Marcin; Kozołub, Paweł; Klimanek, Adam; Białecki, Ryszard A.

doi:10.1016/j.partic.2013.10.007

Cited by 88 publications

(35 citation statements)

References 24 publications

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“…The hybrid Euler-Lagrange approach, which takes the middle ground between the TFM and the DEM, has the potential to handle larger systems compare to those that can be analyzed by the DEM. Recently, the hybrid Euler-Lagrange was used for analyzing the behaviour of large scales gas-solid systems [35,36,37]. This approach should be evaluated for heat transfer analysis in dense gas-solid fluidization systems in the future.…”

Section: Introductionmentioning

confidence: 99%

CFD simulation of transient gas to particle heat transfer for fluidized and spouted regimes

Fattahi

Hosseini

Ahmadi

2016

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

CFD simulation of transient gas to particle heat transfer for fluidized and spouted regimes

Fattahi

Hosseini

Ahmadi

2016

Applied Thermal Engineering

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“…The detailed description of the closures terms responsible for modelling granular pressure, granular and bulk viscosities, etc. can be found in [20,21]. The momentum exchange coefficients (K) between plasma and RBC treating as a dense granular flow were calculated applying Gidaspow [20] drag model.…”

Section: Numerical Modelmentioning

confidence: 99%

Multiphase simulation of blood flow within main thoracic arteries of 8-year-old child with coarctation of the aorta

et al. 2017

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In the research, a numerical Computational Fluid Dynamics (CFD) model of the pulsatile blood flow was created and analysed. A real geometry of aorta and its thoracic branches of an 8-year old patient diagnosed with a congenital heart defect -coarctation of the aorta was used. The inlet boundary condition was implemented as the User Define Function according to measured values of volumetric blood flow. The blood flow was treated as multiphase using Euler-Euler approach. Plasma was set as the primary and dominant fluid phase, with the volume fraction of 0.585. The morphological elements (RBC and WBC) were set as dispersed phases being the remaining volume fraction.

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“…Dotyczy to zwłaszcza obszaru dolnej części komory paleniskowej kotła fluidalnego, w której szczególnie trudno odzwierciedlić turbulentny przepływ mieszaniny typu ziarna-gaz z reakcjami chemicznymi [1,2]. Z tego względu większość zagadnień związanych z modelowaniem zjawisk przepływowych w kotłach z CWF wymaga stosowania metod doświadczalnych [3][4][5].…”

Section: Wstępunclassified

Methods of Determination of Particle Size Distributions of Inert Materials used in Laboratory Studies of Circulating Fluidized Bed Boiler Hydrodynamics

Ziaja

Mirek

2017

Eng. Prot. Environ.

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The paper presents the results of investigations concerning the influence of the method of determination of particle size distributions on the modeling of aerodynamics of circulating fluidized bed in laboratory conditions. The advantages and disadvantages of the most commonly used sieve analysis and laser diffraction methods are presented, showing that these methods cannot always be used interchangeably. Based on the obtained results, a discussion on the influence of basic parameters of particle diameter distributions on key parameters characterizing the aerodynamics of the circulating fluidized bed.Keywords: fluidization, aerodynamics of fluidized, fluidized bed boiler, sieve analysis, laser diffraction methods WstępTechnologia fluidalna w przemyśle energetycznym wykorzystywana jest w procesach spalania paliw stałych, a w szczególności współspalania paliw kopalnych i biomasy. Spalanie paliw w kotłach z cyrkulacyjną warstwą fluidalną (CWF) charakteryzuje się szeregiem zalet. Między innymi pozwala uzyskiwać metodami pierwotnymi stosunkowo niską emisję tlenków azotu (NO x ) oraz siarki (SO 2 ) przy zachowaniu wysokiej sprawności kotła, choć nie bez konieczności stosowania dodatkowych instalacji neutralizujących te związki w spalinach. Zaawansowane metody teoretyczne, numeryczne i doświadczalne modelowania przepływów ciepła i masy w kotłach z CWF są kluczowym elementem projektowania nowych oraz modernizacji istniejących jednostek tego typu. Odgrywają one istotną rolę w związku z ciągłym zaostrzaniem przepisów dotyczących wielkości emisji towarzyszącej procesom spalania.W latach osiemdziesiątych ubiegłego stulecia wraz z intensywnym rozwojem mocy obliczeniowej maszyn cyfrowych nastąpił znaczący rozwój metod obliczeniowych numerycznej mechaniki płynów (CFD -Computational Fluid Dynamics).

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Modeling of particle transport and combustion phenomena in a large-scale circulating fluidized bed boiler using a hybrid Euler–Lagrange approach

Cited by 88 publications

References 24 publications

CFD simulation of transient gas to particle heat transfer for fluidized and spouted regimes

CFD simulation of transient gas to particle heat transfer for fluidized and spouted regimes

Multiphase simulation of blood flow within main thoracic arteries of 8-year-old child with coarctation of the aorta

Methods of Determination of Particle Size Distributions of Inert Materials used in Laboratory Studies of Circulating Fluidized Bed Boiler Hydrodynamics

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