CFD simulation of multiphase fluid flow in a two-dimensional gas-solid fluidized bed using two different turbulence models

Daryus, Asyari; Siswantara, Ahmad Indra; Budiarso,; Gunadi, Gun Gun Ramdlan; Pujowidodo, Hariyotejo

doi:10.1063/1.5086563

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…Furthermore, an important aspect in binary particle-based fluidized beds is that the minimum fluidization velocity varies non-linearly with bottom or top particles in contrast to a uniformly sized bed, and the particle velocity increases with an increase in the superficial velocity. A comprehensive literature review on the work carried out by the various authors using experimental techniques (Čársky et al, 1987;Hoffmann et al, 1993;Chehbouni et al, 1994;Gauthier et al, 1999;Leu and Wu, 2000;Harris et al, 2002;Ellis et al, 2004;Chew et al, 2010;Mazzei et al, 2010;Rao et al, 2010;Jayarathna and Halvorsen, 2011;Sau and Biswal, 2011;Di Maio et al, 2012;Obuseh et al, 2012;Lan et al, 2014;Philippsen et al, 2015;Leion et al, 2018;Menéndez et al, 2019;Penn et al, 2019;Chew and Cocco, 2021;Emiola-Sadiq et al, 2021;Gupta and De, 2021) and mathematical modeling/CFD (Cooper and Coronella, 2005;Du et al, 2006;Gao et al, 2009;Pei et al, 2010;Zaabout et al, 2010;Chang et al, 2012;Mostafazadeh et al, 2013;Benzarti et al, 2014;Sahoo and Sahoo, 2016;Bakshi et al, 2017;Agrawal et al, 2018;Chang et al, 2019;Daryus et al, 2019;Khezri et al, 2019;Shrestha et al, 2019;…”

Section: Introductionmentioning

confidence: 99%

CFD simulations to study bed characteristics in gas–solid fluidized beds with binary mixtures of Geldart B particles: II quantitative analysis

Ganguli

Bhatt

2023

Front. Energy Res.

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Hydrodynamics of fluidized beds with binary mixtures of particles is important in many industrial applications. The binary particles are generally in the Geldart particle range. In our earlier work, (Part I) of this work simulations were carried out and qualitative analysis was presented. Quantitative predictions of gas velocity and particle velocity profiles have been presented in the present work, which is Part II of the two-part work on computational fluid dynamics (CFD) simulations of binary fluidized beds. It was observed that the dynamics of the bed vary for different binary mixtures and are a strong function of superficial velocity and bed height. Mixing and segregation in beds for two different initial bed heights and six different binary mixtures and superficial velocities have been identified. Segregation is prominent for binary mixtures with 20 wt.% and 80 wt.% of large particles, whereas mixing is observed in 40 wt.% and 60 wt.% large particle mixtures. Bypassing of gas near the walls is prominently seen for 60 wt.% large particles with gas velocities as high as 5 m/s. Time-averaged axial particle volume fractions have been observed to be lower in the dilute phase with large undulations in the middle whenever the bed is well mixed for central axial profiles. The axial volume fraction profiles also confirm the mixing and segregation for the 40 wt.% and 20 wt.% composition of large particles for the operating conditions considered for the study. Bed height expansion is linear until a certain superficial velocity with the increase or decrease depending on the superficial velocity or bed height of operation. Furthermore, correlations for minimum fluidization velocity and pressure drops from the literature have been compared with experimental results. The simulated data have been considered for the development of a correlation for minimum fluidization velocity. The predicted results match experimental data with a 10%–15% deviation.

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Section: Introductionmentioning

confidence: 99%

CFD simulations to study bed characteristics in gas–solid fluidized beds with binary mixtures of Geldart B particles: II quantitative analysis

Ganguli

Bhatt

2023

Front. Energy Res.

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Investigation the effect of superficial velocity to the heat transfer in bubbling regime of fluidization using CFD simulation

Widiawaty

Siswantara²,

Budiarso

et al. 2019

AIP Conference Proceedings

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Parametric study of gas-solid flow characteristic by using integration computational fluid dynamics and dynamic simulation

Widiawaty

Siswantara

Budiarso

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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The multiphase gas-solid in the FCC Riser system is a complex flow. The particle flow influenced by superficial velocity. Some researchers showed that it needs a method to solve the advanced analysis in solid-particle characteristics, for example, Reynold number particle, the difference of height fluidization, coefficient of drag, and particle forces. This research gives an alternative method by integrating the CFD method and dynamic simulation method. We used EES as dynamic simulation software. The simulation data need some data such as average fluid velocity, average solid velocity, a maximum height of fluidization, and void fraction. The mathematical model is performed and the simulation data is copied to EES to analyst the gas-solid flow characteristic. This parametric study has been carried out with several superficial velocity 0.35 m s−1, 0.45 m−1, 0.5 m−1, and 0.7 m s−1. The results show that there are fluctuations in the forces received by the particles due to changes in the superficial velocity. However, the tendency of fluctuation trend to be directly proportional to the increase in the superficial velocity. The dynamic simulation calculations have a good agreement compare to literature studies and basic theory for solid flow behaviour in bubbling regimes.

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CFD simulation of multiphase fluid flow in a two-dimensional gas-solid fluidized bed using two different turbulence models

Cited by 3 publications

References 10 publications

CFD simulations to study bed characteristics in gas–solid fluidized beds with binary mixtures of Geldart B particles: II quantitative analysis

CFD simulations to study bed characteristics in gas–solid fluidized beds with binary mixtures of Geldart B particles: II quantitative analysis

Investigation the effect of superficial velocity to the heat transfer in bubbling regime of fluidization using CFD simulation

Parametric study of gas-solid flow characteristic by using integration computational fluid dynamics and dynamic simulation

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