Open Science Research Excellence
@article{(International Science Index):http://waset.org/publications/10003828,
  title    = {Identification of the Main Transition Velocities in a Bubble Column Based on a Modified Shannon Entropy},
  author    = {Stoyan Nedeltchev and  Markus Schubert},
  country   = {Germany},
  institution={Helmholtz-Zentrum Dresden-Rossendorf},
  abstract  = {The gas holdup fluctuations in a bubble column (0.15 m in ID) have been recorded by means of a conductivity wire-mesh sensor in order to extract information about the main transition velocities. These parameters are very important for bubble column design, operation and scale-up. For this purpose, the classical definition of the Shannon entropy was modified and used to identify both the onset (at UG=0.034 m/s) of the transition flow regime and the beginning (at UG=0.089 m/s) of the churn-turbulent flow regime. The results were compared with the Kolmogorov entropy (KE) results. A slight discrepancy was found, namely the transition velocities identified by means of the KE were shifted to somewhat higher (0.045 and 0.101 m/s) superficial gas velocities UG.},
    journal   = {International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering},  volume    = {10},
  number    = {2},
  year      = {2016},
  pages     = {241 - 244},
  ee        = {http://waset.org/publications/10003828},
  url       = {http://waset.org/Publications?p=110},
  bibsource = {http://waset.org/Publications},
  issn      = {eISSN:1307-6892},
  publisher = {World Academy of Science, Engineering and Technology},
  index     = {International Science Index 110, 2016},
}