Advanced

On the validity of different methods to estimate breakup frequency from single drop experiments

Håkansson, Andreas LU (2020) In Chemical Engineering Science 227.
Abstract

Single drop breakup visualizations are the golden standard for experimentally measuring breakup frequency, g, in turbulent flows. There is a growing demand for empirically obtained breakup frequencies, for population balance equation (PBE) based predictive modelling and for comparing to theoretical suggestions. However, five different methods to estimate g from a breakup visualization can be found in previous investigations, many of them contradictory. This study uses analytical and numerical methods to show that only two of the five suggestions result in estimates that are valid (where ‘valid’ means that the breakup frequencies are meaningful in a PBE setting). This case is also used to discuss the difference between the stochastic one... (More)

Single drop breakup visualizations are the golden standard for experimentally measuring breakup frequency, g, in turbulent flows. There is a growing demand for empirically obtained breakup frequencies, for population balance equation (PBE) based predictive modelling and for comparing to theoretical suggestions. However, five different methods to estimate g from a breakup visualization can be found in previous investigations, many of them contradictory. This study uses analytical and numerical methods to show that only two of the five suggestions result in estimates that are valid (where ‘valid’ means that the breakup frequencies are meaningful in a PBE setting). This case is also used to discuss the difference between the stochastic one drop deformation/breakup view of turbulent fragmentation and the deterministic number density based PBE description, arguing that some aspects of the breakup process will be challenging to describe within the PBE framework, regardless of the choice of breakup frequency model.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Breakup frequency, Droplet breakup, Emulsification, Fragmentation, Turbulence
in
Chemical Engineering Science
volume
227
article number
115908
publisher
Elsevier
external identifiers
  • scopus:85086924222
ISSN
0009-2509
DOI
10.1016/j.ces.2020.115908
language
English
LU publication?
yes
id
ddce4829-cbed-4fae-881e-0427a39e1988
date added to LUP
2020-07-07 08:08:17
date last changed
2020-07-08 05:17:44
@article{ddce4829-cbed-4fae-881e-0427a39e1988,
  abstract     = {<p>Single drop breakup visualizations are the golden standard for experimentally measuring breakup frequency, g, in turbulent flows. There is a growing demand for empirically obtained breakup frequencies, for population balance equation (PBE) based predictive modelling and for comparing to theoretical suggestions. However, five different methods to estimate g from a breakup visualization can be found in previous investigations, many of them contradictory. This study uses analytical and numerical methods to show that only two of the five suggestions result in estimates that are valid (where ‘valid’ means that the breakup frequencies are meaningful in a PBE setting). This case is also used to discuss the difference between the stochastic one drop deformation/breakup view of turbulent fragmentation and the deterministic number density based PBE description, arguing that some aspects of the breakup process will be challenging to describe within the PBE framework, regardless of the choice of breakup frequency model.</p>},
  author       = {Håkansson, Andreas},
  issn         = {0009-2509},
  language     = {eng},
  publisher    = {Elsevier},
  series       = {Chemical Engineering Science},
  title        = {On the validity of different methods to estimate breakup frequency from single drop experiments},
  url          = {http://dx.doi.org/10.1016/j.ces.2020.115908},
  doi          = {10.1016/j.ces.2020.115908},
  volume       = {227},
  year         = {2020},
}