>
Fa   |   Ar   |   En
   Investigations of the gas-liquid multiphase system involving macro-instability in a baffled stirred tank reactor  
   
نویسنده zhang s. ,talaga j. ,müller d. ,dylag m. ,wozny g.
منبع journal of control science and engineering - 2016 - دوره : 2016 - شماره : 0
چکیده    Bubble sauter mean diameter (smd) in gas-liquid multiphase system is of particular interest and the quantification of gas characteristics is still a challenge today. in this contribution,multiphase computational fluid dynamic (cfd) simulations are combined with population balance model (pbm) to investigate the bubble smd in baffled stirred tank reactor (str). hereby,special attention is given to the phenomenon known as the fluid macro-instability (mi),which is a large-scale low-frequency fluid velocity variation in baffled strs,since the fluid mis have a dominating influence on the bubble breakage and coalescence processes. the simulations,regarding the fluid velocity,are validated with laser doppler anemometry (lda) experiments,in which the instant radial velocity is analyzed through fast fourier transform (fft) spectrum. the frequency peaks of the fluid mis are found both in the simulation and in the experiment with a high degree of accuracy. after the validation,quantitative predictions of overall bubble smd with and without mis are carried out. due to the accurate prediction of the fluid field,the influence of the fluid mi to bubble smd is presented. this result provides more adequate information for engineers working in the field of estimating bubble smds in baffled strs. © 2016 shuo zhang et al.
آدرس department of process dynamics and operation,berlin institute of technology,berlin, Germany, institute of heat and process engineering,cracow university of technology,cracow, Poland, evonik technology and infrastructure gmbh,process technology and engineering,marl, Germany, institute of heat and process engineering,cracow university of technology,cracow, Poland, department of process dynamics and operation,berlin institute of technology,berlin, Germany
 
     
   
Authors
  
 
 

Copyright 2023
Islamic World Science Citation Center
All Rights Reserved