Journal ArticleDOI
A bubble-based EMMS model for gas-solid bubbling fluidization
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TLDR
In this article, an energy minimization multi-scale (EMMS) model for gas-solid bubbling fluidized bed was proposed based on the energy-minimization multiscale method (Li and Kwauk, 1994).About:
This article is published in Chemical Engineering Science.The article was published on 2011-11-15. It has received 172 citations till now. The article focuses on the topics: Drag coefficient.read more
Citations
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Filtered two‐fluid models of fluidized gas‐particle flows: New constitutive relations
TL;DR: In this paper, constitutive relations for filtered two-fluid models of gas-particle flows are obtained by systematically filtering results generated through highly resolved simulations of a kinetic theory-based TFM.
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Continuum theory for dense gas-solid flow: A state-of-the-art review
TL;DR: In this paper, the Navier-Stokes order continuum theory is used for CFD simulation of the hydrodynamics of gas-solid fluidization, without taking the effects of heat and mass transfer as well as chemical reactions into consideration.
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Development and validation of an enhanced filtered drag model for simulating gas-solid fluidization of Geldart A particles in all flow regimes
TL;DR: In this paper, an enhanced filtered drag model along with other different drag models derived from different methods for three-dimensional two-fluid model simulations of gas-solid fluidized beds of Geldart A particles covering a broad range of fluidization regimes.
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Comparative analysis of subgrid drag modifications for dense gas‐particle flows in bubbling fluidized beds
TL;DR: In this paper, the authors compare the hydrodynamics of a three-dimensional bubbling fluidized bed computed on a coarse grid using the drag correlations of the groups of EMMS, Kuipers, Sundaresan, Simonin, and the homogenous drag law of Wen and Yu with fine grid simulations for two different superficial gas velocities.
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A structure-dependent multi-fluid model (SFM) for heterogeneous gas–solid flow
TL;DR: In this article, a structure-dependent multi-fluid model (SFM) was proposed to keep the physical nature of these mesoscale structures in mathematical formulation, and the SFM was reduced to the conventional two-fluide model (TFM) as well as the hydrodynamic equations of the bubble-based and cluster-based EMMS (energy minimization multiscale) models by assuming different simplifications of structures.
References
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Journal ArticleDOI
Types of gas fluidization
TL;DR: The behavior of solids fluidized by gases falls into four clearly recognizable groups, characterized by density difference (ϱs −ϱf) and mean particle size as discussed by the authors, and a numerical criterion which distinguishes between groups A and B has been devised and agrees well with published data.
Journal ArticleDOI
Drag coefficient and relative velocity in bubbly, droplet or particulate flows
Mamoru Ishii,Novak Zuber +1 more
TL;DR: In this article, the relative motion correlations for dispersed two-phase flows of bubbles, drops, and particles were developed from simple similarity criteria and a mixture viscosity model, and satisfactory agreements were obtained at wide ranges of the particle concentration and Reynolds number.
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A bubbling fluidization model using kinetic theory of granular flow
Jianmin Ding,Dimitri Gidaspow +1 more
TL;DR: In this paper, a predictive two-phase flow model was derived starting with the Boltzman equation for velocity distribution of particles, which is a generalization of the Navier-Stokes equations of the type proposed by R. Jackson, except that the solids viscosities and stresses are computed by simultaneously solving a fluctuating energy equation for the particulate phase.
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A generalized method for predicting the minimum fluidization velocity
C. Y. Wen,Y. H. Yu +1 more
Journal ArticleDOI
Sedimentation and fluidisation: Part I
J.F. Richardson,W.N. Zaki +1 more
TL;DR: In this paper, the effect of concentration of suspended particles upon their rate of settlement was examined experimentally, and the experimental results obtained in the present work were compared with those predicted from this theory.