CFD Simulation of Different Flow Regimes of the Spout Fluidized Bed with Draft Plates

Abstract

Spout fluidized bed has shown promising for gas-solid contact operations with and without chemical reactions, such as drying, coating, granulation, gasification, pyrolysis, etc. This is because these beds combine features from both spouted and fluidized beds. The other point is the ability to treat chemical transformations involving both heat and mass transfer in combination with particles of various sizes. Therefore, it is extremely important the knowledge of fluid dynamic of the bed, mainly for scale-up projects, which makes computer simulation an essential tool. Researches using the Computation Fluid Dynamics (CFD) proved to be very effective in predicting of particles dynamic in this type of bed. In Computation Fluid Dynamics, the two phases are treated as interpenetration continuous, and these phases are described by equations of conservation of mass, momentum and energy. The goal of the present work was to simulate using CFD experimental fluid dynamics data of a spout fluidized bed. Eight distinct flow regimes were identified which showed up in good agreement with the regime map presented in literature. The results showed that the technique was efficient for the simulation of the hydrodynamic of the bed presented.

Production of highly soluble foliar fertilizer in a spouted bed dryer

“…The SIMPLE Algorithm was used to establish the velocitypressure coupling. We simulated about 5 s of real-time and found a convergence tolerance of 1 x 10 -3 ( Santos et al, 2012;Araújo;Santos, 2017).…”

Computational simulation of soybean particles flow in a hopper using computational fluid dynamics (CFD) and discrete elements method (DEM)

“…Research, Society and Development, v. 9, n. 8, e448985463, 2020 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v9i8.5463 8 CFD simulations have gained prominence in studies of heat, mass, and momentum transfers phenomena in various devices, such as spouted beds (Vieira Neto et al, 2008;Cunha et al, 2009;Bortolotti et al, 2013;Santos et al, 2015;Santos et al, 2017;Batista Junior et al, 2019); fluidized beds (Müller et al, 2009;Araújo & Santos, 2017); fixed beds (Béttega et al, 2013, Rocha et al, 2020Stoppe et al 2020); rotational disk granulators (Vieira Neto et al, 2017); dryer drums (Silvério et al, 2014;Cunha et al, 2016;Gravena et al, 2019); solar dryers (Krawczyk & Badyda, 2011;Tegenaw et al, 2019;Rocha et al, 2020;Stoppe et al 2020); concentric and eccentric annuli (Neto et al, 2011;Vieira Neto et al, 2014); horizontal injector wells (Mantegazini & Romero, 2019) and waste treatment tank (Pereira & Góis, 2020).…”

Simulação de leito empacotado com misturas binárias de esferas de diâmetros diferentes empregando correlações e o Método de Elementos Discretos

“…As simulações computacionais de sistemas envolvendo sólidos particulados têm contribuído de forma significativa na otimização de processos e podem ser aplicadas a diversas operações, tais como fluidização (Araújo & Santos, 2017), fluidodinâmica de leitos de jorro (Santos et al, 2015;Santos et al, 2017;Batista Jr et al, 2019), secadores e granuladores de tambor rotativo (Silvério et al, 2014;Gravena et al, 2019), secador solar de leito fixo (Stoppe et al, 2020;Rocha et al, 2020), aquecimento de forno solar (Faria et al, 2020), granulador de prato (Vieira Neto et al, 2017), câmara de separação gravitacional (Almeida et al, 2020;Mangucci et al, 2020), ciclones (Lacerda et al, 2005), hidrociclones (Ullmann et al, 2021), silos de descarga (Paula et al, 2020).…”