Imperial College London
Alternate

ProfessorGeorgePapadakis

Faculty of Engineering, Department of Aeronautics

Professor of Aerodynamics
 
 
 
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Contact

 

+44 (0)20 7594 5080g.papadakis

 
 
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Location

 

331City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Tang:2023:10.1016/j.ces.2023.118511,
author = {Tang, HY and Rigopoulos, S and Papadakis, G},
doi = {10.1016/j.ces.2023.118511},
journal = {Chemical Engineering Science},
pages = {1--20},
title = {On the effect of turbulent fluctuations on precipitation: A direct numerical simulation – population balance study},
url = {http://dx.doi.org/10.1016/j.ces.2023.118511},
volume = {270},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The objective of the present paper is to investigate the effect of turbulent fluctuations on precipitationand the implications for modelling. To this end, a coupled direct numerical simulation (DNS) - populationbalance study is conducted on the experiments of Schwarzer et al. (2006) on BaSO4 precipitation in a Tmixer. The unclosed terms in the averaged population balance equation are identified and evaluated viaDNS. A comparison of the average nucleation and growth rates with those computed with the averagevalues shows significant deviations indicative of the importance of fluctuations in precipitation modelling. Furthermore, the correlation between growth and number density is analysed, as well as its contribution to the reactant consumption. The study is performed at Sc ¼ 1 as it is, at present, not possible toresolve the sub-Kolmogorov scales at high Reynolds and Schmidt numbers. However, an attempt toinvestigate the effect of sub-Kolmogorov scales is made by performing a simulation of precipitation ina similar T-mixer at a lower (but still turbulent) Reynolds number and at Sc ¼ 1 and Sc ¼ 10. The findingsindicate the presence of thinner reaction zones at higher Sc, but the effect on the product particle sizedistribution is marginal. An analysis of the results indicates that this is due to a compensation of theeffect of thinner reaction zones by higher reaction rates occurring therein
AU  - Tang,HY
AU  - Rigopoulos,S
AU  - Papadakis,G
DO  - 10.1016/j.ces.2023.118511
EP  - 20
PY  - 2023///
SN  - 0009-2509
SP  - 1
TI  - On the effect of turbulent fluctuations on precipitation: A direct numerical simulation – population balance study
T2  - Chemical Engineering Science
UR  - http://dx.doi.org/10.1016/j.ces.2023.118511
UR  - http://hdl.handle.net/10044/1/105412
VL  - 270
ER  -
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