Suspending of solid particles in liquid by agitators

Zwietering, Th.N.

doi:10.1016/0009-2509(58)85031-9

Cited by 881 publications

(595 citation statements)

References 11 publications

Supporting

Mentioning

532

Contrasting

Unclassified

Order By: Relevance

“…During the measurements conducted in the gas-solid-liquid system, impeller speeds higher than the critical impeller speeds n JSG for the three-phase system were maintained. Critical agitator speeds in the gas-solid-liquid system were evaluated on basis of the Zwietering criterion (Zwietering, 1958).…”

Section: Methodsmentioning

confidence: 99%

Mass Transfer in Multiphase Mechanically Agitated Systems

Kiełbus-Rąpała¹,

Karcz²

2011

Mass Transfer in Multiphase Systems and Its Applications

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Mass Transfer in Multiphase Mechanically Agitated Systems

Kiełbus-Rąpała¹,

Karcz²

2011

Mass Transfer in Multiphase Systems and Its Applications

View full text Add to dashboard Cite

“…The ratio between the impeller clearance and the tank diameter, c/T, was varied in the range 0.16 ÷ 0.29, and Ω increased from 500 to 700 rpm. Researches by Zwietering (1958), Mak (1992), and Jirout and Rieger (2011) suggest that, in all cases, the rotational speed is enough to avoid particle accumulation. The effects of the above parameters on the predicted wear scar are shown in Figs.…”

Section: Definition Of a New Erosion-related Functionmentioning

confidence: 99%

A combined CFD-experimental method for abrasive erosion testing of concrete

Messa

Branco

Filho

et al. 2017

Journal of Hydrology and Hydromechanics

View full text Add to dashboard Cite

Serious damage may occur to concrete hydraulic structures, such as water galleries, spillways, and stilling basins, due to the abrasive erosion caused by the presence of solid particles in the flow. This underlines the importance of being capable in providing characterization of the concrete from the point of view of its vulnerability to abrasive erosion, in order to improve the design of the structure and the material selection. Nevertheless, the existing apparatus for concrete abrasive erosion testing are either far from allowing realistic simulation of the actual environment in which this phenomenon occurs, or show a large degree of complexity and cost. An alternative method has been developed with the aid of Computational Fluid Dynamics (CFD). CFD was first employed to verify the effectiveness of a new laboratory equipment. Afterwards, a parameter has been introduced which, by successful comparison against preliminary experiments, proved suitable to quantify the effect of the fluid dynamic conditions on the concrete abrasive erosion, thereby opening the way to CFD-based customization of the apparatus. In the future, the synergy of numerical and physical modelling will allow developing predictive models for concrete erosion, making it possible to reliably simulate real structures.

show abstract

“…In literature, there are many correlations to calculate the critical (minimum) impeller speeds for off-bottom suspension of the particles heavier than the liquid (Kamieński, 2004;Nienow, 1968;Paul et al, 2004;Rieger and Ditl, 1994;Zwietering, 1958). Particles less dense than the liquid will float onto the liquid surface (Etchells, 2001).…”

Section: Introductionmentioning

confidence: 99%

Influence of different factors on momentum transfer in mechanically agitated multiphase systems

Cudak¹,

Kiełbus-Rąpała²,

Major-Godlewska³

et al. 2016

Chemical and Process Engineering

View full text Add to dashboard Cite

A comparative analysis concerning the influence of different factors on momentum transfer in mechanically agitated systems was carried out on the basis of experimental results for solid-liquid, gas-liquid and gas-solid-liquid systems. The effects of the impeller -baffles system geometry, scale of the agitated vessel, type and number of impellers and their off-bottom clearance, as well as physical properties of the multiphase systems on the critical impeller speeds needed to produce suspension or dispersion, power consumption and gas hold-up were analysed and evaluated.

show abstract

Suspending of solid particles in liquid by agitators

Cited by 881 publications

References 11 publications

Mass Transfer in Multiphase Mechanically Agitated Systems

Mass Transfer in Multiphase Mechanically Agitated Systems

A combined CFD-experimental method for abrasive erosion testing of concrete

Influence of different factors on momentum transfer in mechanically agitated multiphase systems

Contact Info

Product

Resources

About