A correlation for solid friction factor in vertical pneumatic conveying lines

Yang, Wen‐Ching

doi:10.1002/aic.690240326

Cited by 107 publications

(62 citation statements)

References 11 publications

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“…Due considerations were also not given to the particle-wall, particle-particle and particle-fluid friction. Compared to it, the Yang's [9] correlation shows marked improvement. A modified equation was suggested by Bagchi et al ., [10] wherein the solid loading ratio and Archimedes number were recognized as significant variables.…”

Section: Introductionmentioning

confidence: 95%

A critical analysis of the acceleration length and pressure profile of single‐particle systems in a circulating fluidized bed

Das

Meikap

Saha

2008

Asia-Pacific J Chem Eng

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A study was conducted to explore the hydrodynamic behaviors using both Geldart group A and B materials in a circulating fluidized bed unit consisting of fast column (riser) of 0.1016 m i.d. and 5.62 m height. The materials tested were 120 µm of the fluid catalytic cracking (FCC) catalyst, 166 µm of iron ore, 215 µm of coal and five types of sand particles, ranging in size from 300 to 622 µm. The superficial air velocity ranged between 2.01 and 4.681 m/s and solid fluxes of 12.5-50 kg/m 2 s. Riser static pressure profiles were measured for the FCC catalyst, coal, iron ore and sand particles. Acceleration lengths were determined from the data, and using these and other data from the literature two correlations for the acceleration length were established for Geldart's group A and B particles. 

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Section: Introductionmentioning

confidence: 95%

A critical analysis of the acceleration length and pressure profile of single‐particle systems in a circulating fluidized bed

Das

Meikap

Saha

2008

Asia-Pacific J Chem Eng

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“…The wall friction due to solid particles can be calculated, following Fanning's equation (Yang, 1978), by:…”

Section: Wall Frictionmentioning

confidence: 99%

Advanced modeling of fluid catalytic cracking riser‐type reactors

1993

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A mathematical model is developed that predicts three-dimensional, two-phaseflow, heat transfer and reaction inside catalytic cracking riser-type reactors. The model consists of the full set of partial-differential equations that describe the conservation of mass, momentum, energy and chemical species for both phases in the reactor, coupled with empirical correlations concerning interphase friction, interphase heat-transfer and fluid-to-wall frictional forces. The cracking reaction is simulated by a simple three-lump kinetic model, but more realistic kinetic models can be easily included. The model can predict the most important engineering aspects of a riser reactor including pressure drop, catalyst holdup, interphase slip velocity, catalyst acceleration zone, choking behavior and temperature distribution in both phases, and yields distribution all over the reactor. It can also predict other complex engineering three-dimensional, two-phase problems realistically using computational fluid dynamics techniques.

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“…Since the transport section in riser appears to behave like a fully developed dilute-phase vertical pneumatic zone, the correlation for estimating particle velocity beyond the acceleration region (Yang, 1978) has been employed. …”

Section: Splash Zonementioning

confidence: 99%