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Basic Relationships: 1. Size and properties of particles; 2. Collision mechanics of solids; 3. Momentum transfer and charge transfer; 4. Basic heat and mass transfer; 5.


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Basic equations; 6. Intrinsic phenomena in a gas-solid flow; Part II. System Characteristics: 7. Gas-solid separation; 8. Hopper and stand pipe flows; 9. Dense-phase fluidized beds; Circulating fluidized beds; Pneumatic conveying of solids; The drag model is subsequently verified numerically and experimentally. Springer Professional. Back to the search result list. Table of Contents Frontmatter Chapter 1. Introduction Abstract. Gas—solid fluidized bed reactor is widely used in industrial processes like oil catalytic cracking, coal combustion, and flue gas desulfurization.

On account of the complexity of multiscale, multipattern, and multiphase coupling Ge et al.

Investigations on Mesoscale Structure in Gas Solid Fluidization and Heterogeneous Drag Model

At the height dial direction between the simulation results drag model B of 8. Predicted profiles were drawn from the time-averaged seems much flatter due to the less solid concentration in this values over the period 20—30 s.

The coexistence of a dense region. The computed results are in good agreement with empirical correlations in the an- nulus region, but under-predict the voidage in the core 1. Axial voidage profile 0. Predicted profiles were again drawn from the time-averaged values The predicted sigmoid distribution of voidage in the axial direction is in reasonable agreement Solid velocity profiles.

Table of contents

The 3. Gas velocity profiles. Mooson Kwauk for his encouragement and valu- able suggestions to this work. The financial support from 5. G is tion of the heterogeneous gas—solid flow, and its variation is also gratefully acknowledged. However, drag correlations employed in current two-fluid models are References derived from experimental results of homogeneous systems without consideration of local heterogeneous structure, and [1] J.

Li, M.


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Kwauk, Exploring complex systems in chemical engi- therefore, it is suspected that those drag correlations are ca- neering—the multi-scale methodology, Chem. Anderson, R. Jackson, A fluid mechanical description of A feasible approach should correlate the drag coefficient fluidized beds, Ind. Gidaspow, Hydrodynamics of fluidization and heat transfer: for a control volume with its local structure parameters.

Mod-01 Lec-38 Fluidized Bed Reactor Design Part III

The supercomputer modeling, Appl. Kuipers, K. Van Duin, F. Van Beckum, W. Van the heterogeneous structure is resolved into the dense cluster Swaaij, A numerical model of gas-fluidized beds, Chem. Sun, D. Gidaspow, Computation of circulating fluidized-bed riser interactions are resolved into that inside the dense phase and flow for the fluidization VIII benchmark test, Ind. Extending this thought to each local con- [6] S. Chapman, T. Sinclair, R. Jackson, Gas—particle flow in a vertical pipe with investigate the variations of drag coefficient with structure particle—particle interactions, AIChE J.

Their relationships are established by a set of [8] D. Wen, Y. Yu, Mechanics of fluidization, Chem. Simulation results show that the drag coefficient calcu- Symp. Ergun, Fluid flow through packed columns, Chem. Li, C. Cheng, Z. Zhang, J. Yuan, A. Nemet, F. Fett, The EMMS agreement with the commonly accepted conclusions from model—its application, development and updated concepts, Chem. Li, A.

RKUstudent | Department of Chemical Engineering

Chen, Z. Yan, G. Xu, X. Zhang, Particle—fluid contacting in simulated flow structure is rather dilute and homogeneous, circulating fluidized beds, in: A. Avidan Ed.


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  7. Li, L. Wen, W. Ge, H. Cui, J. Ren, Dissipative structure in coefficient.

    Bibliographic Information

    Syamlal, Particle cluster effects in the numerical captured by showing the course of particle motion, i. Qi, C. You, A.