An evaluation of expansion equations for fluidized solid–liquid systems

Akgiray, Ömer; Soyer, Elif

doi:10.2166/aqua.2006.040

Cited by 19 publications

(12 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(1)) is too high and the resulting quadratic equation cannot fit the trend of the data over a wide range of Reynolds numbers. A similar result was previously documented when the Ergun equation was applied to liquid-solid fluidization and sedimentation data for spherical particles (Akgiray, Soyer and Yuksel [59]; Akgiray and Soyer [8]). …”

Section: Resultssupporting

confidence: 85%

“…The notation Re 1 used in (Eq. (15)) is adopted from Richardson, Harker and Backhurst [4] who used it for packed beds and from Dharmarajah and Cleasby [7], Akgiray and Soyer [8] and Soyer and Akgiray [9] who employed it to correlate liquid-solid fluidization and sedimentation data. The pressure drop-flow rate correlations considered and tested in this work are listed in Table 1 in terms of f P and Re defined as above.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A revisit of pressure drop-flow rate correlations for packed beds of spheres

2015

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

A revisit of pressure drop-flow rate correlations for packed beds of spheres

2015

View full text Add to dashboard Cite

“…In the literature, correction formulas are also given (Richardson and Zaki, 1954); (Loeffler, 1953), often developed on an empirical basis. The effect of container walls, however, can be neglected in most full-scale operations (Akgiray and Soyer, 2006). Regarding relatively small laboratory columns, wall effects might have to be considered because wall friction opposes the drag force acting on the particles during fluidisation.…”

Section: Wall Effectsmentioning

confidence: 99%

Supplementary material to "Can terminal settling velocity and drag of natural particles in water ever be predicted accurately?"

Kramer¹,

Moel²,

Raaghav³

et al. 2020

Preprint

View full text Add to dashboard Cite

Brown-Lawler (2003) 5.6Standard drag curve with average values and prediction models Figure 41Standard drag curve (SDC) for 3,629 grains, using average values for 16 types of materials compared with popular prediction models for spherical and non-spherical particles. indicates that the measured sphericity is included in the model. Model prediction accuracy for data from the literatureData was obtained from the literature for the dimensionless drag coefficient versus the terminal Reynolds numbers (Table 14).

show abstract

“…In recent years, with the progress in calculation capacities pushed the computational models to develop and reproduce mechanical behaviors in macroscopic and microscopic levels, of complex units involving multiphase flows. Many of models have been studied circulated fluidized beds and proposed some models of porosity as secondarily in their researches [20][21][22][23][24][25]. Tanaka et al [26] investigated the cluster formation in a circulating fluidization in gas-solid flows, and the effect of global porosity on the inhomogeneous and stability of the system.…”

Section: Literature Reviewmentioning

confidence: 99%

Comparison of porosity models for fluidized beds

Flamarz

2017

KJAR

View full text Add to dashboard Cite

Abstract:The paper describes a comparison between four numerical models of porosity, for better understanding the influence of porosity on the hydrodynamics (macroscopic and microscopic) behaviors of fluidized beds. The study has been done through an approach based on combine discretecontinuum to achieve the simulations. This approach deals with the modeling of the interactions between the fluid-solid. In which the discrete approach is used for localizing the position and velocity of each individual particles based on Newton's 2 nd law of motion, using a numerical time stepping scheme. While the continuum approach is based on finite volume method, which is solved the fluid flow equations (Navier-Stokes equations). The geometry of fluidizing column was; column diameter (D=0.096 m) and column height (H=1 m). Glass grains were firstly deposited inside the column, and then subjected to the range of inlet water velocity (0-0.14 m.s -1 ). The results of simulations are point out those four models of porosity, achieved comparable results for simulating fluidized beds. The simulations results were compared and showed a good agreement and consistency with the experimental data in the literatures. In other hand, the simulations results revealed that the models of porosity, which based on the microscopic scale, are most reliable between the models of porosity. However the differences between these models must be analyzed and kept in mind in order to select the appropriate porosity model. The results revealed that the porosity is an important parameter which effect on the hydrodynamics behavior of fluidized beds during the fluidization processes.

show abstract

An evaluation of expansion equations for fluidized solid–liquid systems

Cited by 19 publications

References 16 publications

A revisit of pressure drop-flow rate correlations for packed beds of spheres

A revisit of pressure drop-flow rate correlations for packed beds of spheres

Supplementary material to "Can terminal settling velocity and drag of natural particles in water ever be predicted accurately?"

Comparison of porosity models for fluidized beds

Contact Info

Product

Resources

About

An evaluation of expansion equations for fluidized solid–liquid systems

Cited by 19 publications

References 16 publications

A revisit of pressure drop-flow rate correlations for packed beds of spheres

A revisit of pressure drop-flow rate correlations for packed beds of spheres

Supplementary material to &quot;Can terminal settling velocity and drag of natural particles in water ever be predicted accurately?&quot;

Comparison of porosity models for fluidized beds

Contact Info

Product

Resources

About

Supplementary material to "Can terminal settling velocity and drag of natural particles in water ever be predicted accurately?"