Wall-to-bed heat transfer in vertical hydraulic transport and in particulate fluidized beds

Garić‐Grulović, Radmila; Bošković‐Vragolović, Nevenka; Grbavčić, Željko; Arsenijević, Zorana

doi:10.1016/j.ijheatmasstransfer.2008.03.030

Cited by 9 publications

(1 citation statement)

References 18 publications

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“…It was assumed that at the inlet and at the outlet of the heating zone, the particles and the fluid had the same temperature [2]. The heat transfer coefficient in the fluidized bed was calculated as [3]:…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Analogy between momentum and heat transfer in liquid–solid fluidized beds

et al. 2015

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Wall-to-bed heat transfer in particulate fluidized beds of spherical particles was studied. Experiments were performed using spherical glass particles of 0.80-2.98 mm in diameter with water in a 25.4 mm I.D. copper tube equipped with a steam jacket. Heat transfer data related to the fluid-particle interphase drag coefficient were obtained and compared with previous results for wall-to-bed mass transfer in fluidized beds [Bošković et. al., Powder Technol., 79 (1994) 217]. All the data for momentum, heat and mass transfer in particulate fluidized beds of spherical particles, showed the existence of an analogy among these three phenomena.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Analogy between momentum and heat transfer in liquid–solid fluidized beds

et al. 2015

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Heat transfer in a swirling fluidized bed with geldart type-D particles

Mohideen

Sreenivasan

Sulaiman

et al. 2012

Korean J. Chem. Eng.

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The wall-tekd heat transfer coefficients were measued by fixing a thin constaztan foil heater on the bed wall. Thermocouples located at diffemt heigh~s on the foil show a decrease in the wall heat transfer coefficient with bed height It was seen that only a discrete particle model which accounts for the conduction between the particle and the heat transfer s h c e and the gaxonvective augmentation can adequately represent the mechanism ofheat transfer in the swuline, fluidized bed. As the jet of gas enters the bed at a certain small angle, 8, to the horizantal plane, the jet will have two componentF ofvelocity. The vatical component of the jet yelocity, wlich is given by V sin 8, will mate fluididon ofmticles, while the h h t a l c o m m a V cos 8, will cmte s\v%kg [4]. The dish7iitor used in this bed ~i~. 1. ~~~i~ ofa swirling fluidized bed, consists of overlapping blades that are truncated sectors of a circle forming an mular region for gas flow The wne in the centn. of the bed avoiak a dead zone while graduaUy inueasing the 8oss-Many of the early works on wall-bed heat k f e r in fluidized sectional area of gas flow to the fRe nubx abve the bed beds held tha[ theprhcipal resiskce to heathsfer is a fluid film and that moving fluid&d pahcles acting as ttnin~lence promoters ' To whom corresnandence should be addressed.sw1u the 6lm to reduce the resistrmce. Ihe solid particle-surface

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