Hydrodynamics of two-phase cocurrent downflow through packed beds. Part II: Experiment and correlations

AIChE Journal ◽  
1983 ◽  
Vol 29 (3) ◽  
pp. 473-483 ◽  
Author(s):  
V. G. Rao ◽  
M. S. Ananth ◽  
Y. B. G. Varma
Keyword(s):  
Packed Beds ◽  
Two Phase

Experimental and Theoretical Modeling of the Effective Thermal Conductivity of Rough Steel Spheroid Packed Beds

2003 ◽  
Vol 125 (4) ◽  
pp. 693-702 ◽  
Author(s):  
G. Buonanno ◽  
A. Carotenuto ◽  
G. Giovinco ◽  
N. Massarotti
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Solid Mechanics ◽  
Packed Bed ◽  
Elementary Cell ◽  
Upper And Lower Bounds ◽  
Packed Beds ◽  
The Finite Element Method ◽  
Two Phase ◽  
Experimental Apparatus

The upper and lower bounds of the effective thermal conductivity of packed beds of rough spheres are evaluated using the theoretical approach of the elementary cell for two-phase systems. The solid mechanics and thermal problems are solved and the effects of roughness and packed bed structures are also examined. The numerical solution of the thermal conduction problem through the periodic regular arrangement of steel spheroids in air is determined using the Finite Element Method. The numerical results are compared with those obtained from an experimental apparatus designed and built for this purpose.

scholarly journals One-dimensional Flow Characteristics of Gas-Powder Two Phase Flow in Packed Beds

1991 ◽  
Vol 77 (2) ◽  
pp. 236-243 ◽  
Author(s):  
Koichiro SHIBATA ◽  
Masakata SHIMIZU ◽  
Sin-ichi INABA ◽  
Reijiro TAKAHASHI ◽  
Jun-ichiro YAGI
Keyword(s):  
Two Phase Flow ◽  
Flow Characteristics ◽  
Phase Flow ◽  
Packed Beds ◽  
Two Phase ◽  
One Dimensional ◽  
Dimensional Flow

Modelling the Hydrodynamics of Gas-Liquid Packed Beds via Slit Models: A Review

2005 ◽  
Vol 3 (1) ◽  
Author(s):  
Ion Iliuta ◽  
Faical Larachi
Keyword(s):  
Mass Transfer ◽  
Multiphase Flow ◽  
Complex Geometry ◽  
Packed Bed ◽  
Packed Beds ◽  
Reactor Performance ◽  
Two Phase ◽  
Flow Equations ◽  
Considerable Impact ◽  
Transfer Thermodynamics

Packed bed columns are intensively used as multiphase contactors and reactors in chemical, biochemical, and petrochemical industries. Due to two-phase through the packed beds, the performance of multiphase contactors depends on the complex interaction of the interphase mass transfer, thermodynamics and hydrodynamics. Under reaction conditions, the intraparticle mass transfer and reaction kinetics have additional considerable impact on the reactor performance. The inherent complexity of multiphase systems leaves many issues unresolved and leads to many inconsistencies and questionable approximations, especially in the modelling of multiphase flow. Multiphase flow modelling in packed beds is a complicated task because of the difficulty incorporating the complex geometry into the flow equations, and the difficulty in accounting for the gas-liquid interactions in the presence of complex fluid-particle (e.g., partial wetting) contacting. This review focuses on recent advances made in the modelling of the hydrodynamics of two-phase downflow and counter-current flow in packed beds via two-fluid models coupled with slit and double slit phenomenological approximations relating the mutual three phase hydrodynamic interactions.

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