A New Approach to Model the Re-Entrainment of Settled Particles Based on Film Theory of Fluid Mass Transfer Processes

2009 ◽  
Vol 26 (1-2) ◽  
pp. 58-68 ◽  
Author(s):  
Dirk Nitschke ◽  
Eberhard Schmidt
Keyword(s):  
Mass Transfer ◽  
Film Theory ◽  
New Approach ◽  
Transfer Processes ◽  
Fluid Mass ◽  
Mass Transfer Processes

scholarly journals Wave approach for modeling pressure swing adsorption

2018 ◽  
Vol 54 (3) ◽  
pp. 35-41 ◽  
Author(s):  
M.B. Kravchenko
Keyword(s):  
Mass Transfer ◽  
Working Conditions ◽  
Pressure Swing Adsorption ◽  
Wave Method ◽  
Efficient Operation ◽  
New Approach ◽  
Transfer Processes ◽  
Wave Approach ◽  
Mass Transfer Processes ◽  
Pressure Swing

A new approach to modeling of the pressure swing adsorption (PSA) based on a wave method for calculating non-stationary periodic mass transfer processes is proposed. The analysis of solutions for plants designed to produce oxygen from air is given. The conditions necessary for highly efficient operation of PSA plants are formulated. The results of calculations for various brands of zeolites are followed, allowing optimizing a choice of zeolite for the set working conditions.

An Investigation of Simple Evaporation Models Used in Spray Simulations

2003 ◽  
Vol 125 (1) ◽  
pp. 179-182 ◽  
Author(s):  
G. F. Yao ◽  
S. I. Abdel-Khalik ◽  
S. M. Ghiaasiaan
Keyword(s):  
Mass Transfer ◽  
Transfer Rate ◽  
Numerical Solutions ◽  
Film Theory ◽  
Mass Transfer Rate ◽  
High Mass ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
Model Predictions ◽  
Evaporation Models

In the present work, an unified derivation of simple evaporation models used in spray simulation is described and a new evaporation model is formulated. In the model, the Nusselt number, Sherwood number, and evaporation mass flux are derived using the traditional film theory. However, instead of determining the film thicknesses using the Nusselt and Sherwood numbers derived in the absence of high mass transfer rate, the film thicknesses are calculated from those derived from the fully numerical solutions which represent the realistic heat and mass transfer processes around a droplet. The model predictions are compared with the fully numerical solutions.

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