Table of Contents
ISRN Chemical Engineering
Volume 2013, Article ID 547489, 10 pages
Research Article

Modeling of Hydrodynamics in a 25 mm ϕ Pulsed Disk and Doughnut Column

1Atomic Energy Regulatory Board, Mumbai 400094, India
2Process Development and Equipment Section, Reprocessing R&D Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India

Received 30 June 2013; Accepted 25 July 2013

Academic Editors: G. D'Errico, J. A. A. González, C.-T. Hsieh, F. Lefebvre, and E. A. O'Rear

Copyright © 2013 Rajnish Kumar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The hydrodynamic parameters, namely, dispersed phase holdup and flooding throughput, have been investigated in 25 mm diameter pulsed disk and doughnut column (PDDC), in no mass transfer conditions. In this work, using existing correlations on plate pulsed columns, the dispersed phase holdup and the flooding throughput are empirically modelled well using the slip velocity concept. A good agreement is observed between experimental values and predicted values obtained from empirical correlation. The experimental data for dispersed phase holdup and flooding throughput has been modelled using the Van Delden model to describe the hydrodynamics characteristics of a PDDC and necessary adjustable parameters for drop size distribution and dispersed phase holdup are updated for 30% TBP-nitric acid system. The model parameters were estimated by minimizing the absolute error between experimental and theoretical values of flooding throughput and holdup data. It was found that the measured values and observed trends could be described accurately using this model after fitting holdup and flooding data. The error between the experimental and theoretical values of flooding throughput and holdup was found to be less than 10%.