Incipient motion of solid particles in horizontal pneumatic conveying

Cabrejos, Francisco J.; Klinzing, George E.

doi:10.1016/s0032-5910(92)85021-m

Cited by 82 publications

(88 citation statements)

References 8 publications

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“…Values obtained with this correlation are also extremely low. The values obtained with the correlation of Cabrejos and Klinzing (1992) for the irregular polyester particles are farther above the experimental results. The results obtained for glass beads and spherical alumina do not agree with the experimental data.…”

Section: The Experimental Setupmentioning

confidence: 48%

“…It is noteworthy to point out that, for the average diameter of 22 μm, the error of this correlation is approximately 100%. The correlation of Cabrejos and Klinzing (1992) overestimates the results, considerably. Cabrejos and Klinzing (1992), Cabrejos and Klinzing (1994), Kalman et al (2005) and Rabinovich and Kalman (2009).…”

Section: The Experimental Setupmentioning

confidence: 63%

“…The correlation of Cabrejos and Klinzing (1992) overestimates the results, considerably. Cabrejos and Klinzing (1992), Cabrejos and Klinzing (1994), Kalman et al (2005) and Rabinovich and Kalman (2009). The results obtained are compared with experimental data obtained by Cabrejos and Klinzing (1994).…”

Section: The Experimental Setupmentioning

confidence: 63%

“…The values obtained with the correlations of Rabinovich and Kalman (2009) are usually very low and those obtained with the correlation of Cabrejos and Klinzing (1992) for particle average diameter above 1500 μm rise very quickly. It should be noted here that the correlation of Cabrejos and Klinzing (1992) was obtained from a theoretical model and some of the parameters were adjusted empirically. The correlation of Cabrejos and Klinzing (1994) is fully empirical.…”

Section: The Experimental Setupmentioning

confidence: 99%

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On the prediction of pickup and saltation velocities in pneumatic conveying

Gomes

Mesquita²

2014

Braz. J. Chem. Eng.

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-This paper presents a comparative study of the critical pickup and saltation velocities of particles in horizontal pipelines for pneumatic conveying design. A comparative study is performed using different existing correlations in the literature for the determination of the minimum velocity of transport as a function of the particle and pipe diameter, particle density, solid mass flow rate and particle sphericity. Their limitations and difficulties in predicting those critical velocities are analyzed. For the pickup velocity, an experimental study was also carried out in order to support the analysis. Recommendations are presented on the use of such correlations.

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Section: The Experimental Setupmentioning

confidence: 48%

Section: The Experimental Setupmentioning

confidence: 63%

Section: The Experimental Setupmentioning

confidence: 63%

Section: The Experimental Setupmentioning

confidence: 99%

See 2 more Smart Citations

On the prediction of pickup and saltation velocities in pneumatic conveying

Gomes

Mesquita²

2014

Braz. J. Chem. Eng.

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“…A common observation is that the product damage increase exponentially as a function of the conveying air velocity where also the angle of impact has a significant influence on the product damage. On the other hand, if the conveying system is operated with a too low conveying velocity, it will be subjected to inconsistent operation due to solids deposition, or become completely inoperable because of pipeline blocking [11][12][13]. In general, the minimum conveying velocity can be defined as the safe air velocity for consistent transportation of pellets [14].…”

Section: Introductionmentioning

confidence: 99%

Online acoustic chemometric monitoring of fish feed pellet velocity in a pneumatic conveying system

et al. 2014

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Fish farmers consider the cost of fish feed pellets as one of the most expensive factors in fish cultivation. Proper control of the handling and conveying systems is necessary to avoid damage and disintegration of the cylindrically shaped fish feed pellets. Pneumatic conveying is widely used to transport large quantities of fish feed. Proneness of crushing the fish feed pellets caused by pellets interaction with the inner wall of the pipeline is a major concern to the manufacturer due to the associated economic loss; pellet damage increases exponentially with the conveying air velocity. On the other hand, too low conveying rates would lead to pipeline blockages and severe pipe vibration. In order to address the foregoing issues, it is necessary to optimize the conveying velocity of fish feed pellets during pneumatic transport. Application of an on-line monitoring technique based on non-invasive passive acoustic measurements and multivariate regression modeling (acoustic chemometrics) was investigated. A partial least squares regression (PLS-R) model was calibrated to predict pellet velocity from 19 m/s to 36 m/s in a pilot scale pneumatic conveying system. The PLS-R prediction model was validated based on independent experimental data (test set validation). The root mean square error of prediction (RMSEP), slope and r 2 of the prediction results were 0.64 m/s, 1.02 and 0.97 respectively. The prediction results obtained shows the applicability of acoustic chemometrics for real-time prediction of the velocities of fish feed pellets during pneumatic conveying.

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Solids transport models comparison and fine‐tuning for horizontal, low concentration flow in single‐phase carrier fluid

et al. 2013

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We determined and fine‐tuned the solids transport models appropriate for predicting the single‐phase carrier fluid velocity to transport solid particles in conduits for horizontal, low concentration flow. A database with 538 experimental data points was compiled. A literature review was performed to determine the data ranges, forces, and mechanisms used to develop 44 models, and their velocity predictions were compared against the database using statistics. Using the dimensionless forms of the models and the data, the model parameters were adjusted to improve their accuracy and identify the dominant forces. At low concentrations: for liquid/solid flow from a bed of solids and gas/solid flow from the bottom of pipelines, the particle weight, and inertial and viscous forces dominate; for gas/solid flow from a bed of solids, the particle weight, and inertial, viscous, and adhesive forces play a role; and gaps exist in the data for large‐diameter pipes and high‐density gases. © 2013 American Institute of Chemical Engineers AIChE J, 60: 76–122, 2014

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Incipient motion of solid particles in horizontal pneumatic conveying

Cited by 82 publications

References 8 publications

On the prediction of pickup and saltation velocities in pneumatic conveying

On the prediction of pickup and saltation velocities in pneumatic conveying

Online acoustic chemometric monitoring of fish feed pellet velocity in a pneumatic conveying system

Solids transport models comparison and fine‐tuning for horizontal, low concentration flow in single‐phase carrier fluid

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