Numerical simulation of liquid-liquid agitated dispersions on the VAX 6520/VP

Ribeiro, Lígia Maria; Regueiras, P.F.R.; Guimarães, M.M.L.; Cruz-Pinto, J.J.C.

doi:10.1016/0956-0521(95)00047-x

Cited by 5 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, an algorithm previously developed by Ribeiro , has been modified to accurately describe the transient behavior of a continuous ideally agitated vessel, ignoring no important phenomena except Marangoni effects, that required only modest computer resources and very low computation times. Details of these models and corresponding algorithms are given elsewhere by Ribeiro et al This algorithm, further adapted by Regueiras , to model an agitated column by stagewise solution of the population balance equations under dynamic conditions was designed to compute the drop-size distribution and local dispersed-phase hold-up profiles along a column. Its use yielded encouraging qualitative agreement with the experimental results obtained in a pilot-plant Kühni column…”

Section: Introductionmentioning

confidence: 99%

Reproducibility of the Hydrodynamic Performance and Measurements in a Liquid−Liquid Kühni Extraction ColumnRelevance to Theoretical Model Evaluation

Gomes

Guimaraes

Lopes

et al. 2004

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Liquid−liquid systems research increasingly concentrates on computer simulations. However, the possibility of adequately testing complex theoretical models against experiments is hindered by a lack of reliable reproducibility data for laboratory and pilot-plant measurements. This strongly limits meaningful evaluation of the increasingly complex process and equipment models/algorithms that are being developed. In this work, experimental data are obtained in a pilot-scale Kühni column, and model parameters and simulated data are generated using a drop population balance model and algorithm. The results can be summarized as follows: (i) As measured by the magnitude of careful random error and corresponding confidence limits estimates, the simulation results exhibit excellent agreement with experimental drop-size distributions and fair conformity with measured dispersed-phase hold-ups. (ii) Both experimental and simulated results show that interdrop coalescence is always present within a column extractor, even at low dispersed-phase hold-ups, and thus cannot be neglected in any physically realistic and accurate modeling.

show abstract

Section: Introductionmentioning

confidence: 99%

Reproducibility of the Hydrodynamic Performance and Measurements in a Liquid−Liquid Kühni Extraction ColumnRelevance to Theoretical Model Evaluation

Gomes

Guimaraes

Lopes

et al. 2004

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Due to the high complexity and cost of the direct experimentation using such equipments, computer simulation becomes very attractive. Algorithms for fast and reliable simulation of single stirred vessels and extraction columns have already been published by some of the present authors, both for steady-state and dynamic conditions [12,11,[3][4][5]14,15].…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of a gravity settler in dynamic conditions

Gomes¹,

Guimarães²,

Ribeiro

2007

Advances in Engineering Software

Self Cite

View full text Add to dashboard Cite

“…Other details of these models and corresponding algorithms are given elsewhere by Ribeiro et al This algorithm, further adapted by Regueiras and co-workers , to model an agitated column, by stagewise solution of the population-balance equations under dynamic conditions, was designed to compute the drop-size distribution and local dispersed-phase holdup profiles along the column. Its use yielded an encouraging qualitative agreement with the experimental results obtained in a pilot-plant Kühni column …”

Section: Introductionmentioning

confidence: 99%

Simulated and Experimental Dispersed-Phase Breakage and Coalescence Behavior in a Kühni Liquid−Liquid Extraction ColumnSteady State

Gomes

Guimaraes

Regueiras

et al. 2006

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Given the difficulties normally associated with direct experimentation in liquid-liquid extraction processes, their direct computer simulation has acquired increased relevance and utility, especially when dealing with some of the details of the dispersed-phase hydrodynamics. The possibility of testing very complex theoretical models of such behavior is increasingly attractive to the researcher, as a result of both the power and the availability of personal computing resources. Experimental data obtained in a pilot-scale Ku ¨hni liquid-liquid extraction column and simulated data generated by means of a drop population-balance model and algorithm were used to describe and compute the local drop-size distributions and dispersed-phase holdup profiles. In this work, the applicability of this algorithm to describe the steady-state behavior of a Ku ¨hni liquid-liquid extraction column is illustrated. Data generated using this algorithm exhibit reasonable agreement with experimental data, with physically meaningful model parameter values.

show abstract

Numerical simulation of liquid-liquid agitated dispersions on the VAX 6520/VP

Cited by 5 publications

References 3 publications

Reproducibility of the Hydrodynamic Performance and Measurements in a Liquid−Liquid Kühni Extraction ColumnRelevance to Theoretical Model Evaluation

Reproducibility of the Hydrodynamic Performance and Measurements in a Liquid−Liquid Kühni Extraction ColumnRelevance to Theoretical Model Evaluation

Numerical modelling of a gravity settler in dynamic conditions

Simulated and Experimental Dispersed-Phase Breakage and Coalescence Behavior in a Kühni Liquid−Liquid Extraction ColumnSteady State

Contact Info

Product

Resources

About