Characteristics of the Child-Droplets Emerged by Micro-Explosion of the Heterogeneous Droplets Exposed to Conductive, Convective and Radiative Heating

Research output: Contribution to journalArticle

Abstract

A study provides for the experimental characteristics of the fragmentation process of the heterogeneous droplets during a strong heating. Among such characteristics are a number, a size, namely, mean, minimum and maximum one, and a total surface area of the child-droplets emerged. We consider three schemes of heating corresponding to convective, conductive and radiative heat transfer. Experiments are carried out using the suspension and emulsion droplets as well as the droplets of two immiscible fluids. The graphite particles are utilized as the solid admixtures to water; diesel is applied as a liquid combustible additive. The effect of heat transfer, concentrations and a type of the admixtures on the fragmentation characteristics is explored. Temperature ranges (100–650 °C) and heat fluxes (4–150 kW/m2) are chosen according to applications, namely, fuel technologies, contact heat exchangers, thermal treatment of liquids, fire extinguishing, etc. The findings are important to develop the technologies based on a secondary atomization of the droplets during overheating and boiling. The results of the conductive heating experiments define the optimum substrate temperatures ensuring an enhanced micro-explosion of the droplets of different composition. The radiative heating is characterized by a strong droplet breakup leading to a greater number of the child-droplets as compared to the conductive and convective one. The conclusions contain future ways of developing the study. [Figure not available: see fulltext.].

Original languageEnglish
JournalMicrogravity Science and Technology
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Droplet
Explosion
Explosions
explosions
Heating
heating
admixtures
fragmentation
extinguishing
radiative heat transfer
Fragmentation
convective heat transfer
atomizing
heat exchangers
liquids
conductive heat transfer
boiling
emulsions
heat flux
Liquid

Keywords

  • Child-droplet
  • Emulsion
  • Heat transfer
  • Immiscible fluid
  • Micro-explosion
  • Suspension

ASJC Scopus subject areas

  • Modelling and Simulation
  • Engineering(all)
  • Physics and Astronomy(all)
  • Applied Mathematics

Cite this

@article{3a69fddd75e8482eaac39c96a9e85239,
title = "Characteristics of the Child-Droplets Emerged by Micro-Explosion of the Heterogeneous Droplets Exposed to Conductive, Convective and Radiative Heating",
abstract = "A study provides for the experimental characteristics of the fragmentation process of the heterogeneous droplets during a strong heating. Among such characteristics are a number, a size, namely, mean, minimum and maximum one, and a total surface area of the child-droplets emerged. We consider three schemes of heating corresponding to convective, conductive and radiative heat transfer. Experiments are carried out using the suspension and emulsion droplets as well as the droplets of two immiscible fluids. The graphite particles are utilized as the solid admixtures to water; diesel is applied as a liquid combustible additive. The effect of heat transfer, concentrations and a type of the admixtures on the fragmentation characteristics is explored. Temperature ranges (100–650 °C) and heat fluxes (4–150 kW/m2) are chosen according to applications, namely, fuel technologies, contact heat exchangers, thermal treatment of liquids, fire extinguishing, etc. The findings are important to develop the technologies based on a secondary atomization of the droplets during overheating and boiling. The results of the conductive heating experiments define the optimum substrate temperatures ensuring an enhanced micro-explosion of the droplets of different composition. The radiative heating is characterized by a strong droplet breakup leading to a greater number of the child-droplets as compared to the conductive and convective one. The conclusions contain future ways of developing the study. [Figure not available: see fulltext.].",
keywords = "Child-droplet, Emulsion, Heat transfer, Immiscible fluid, Micro-explosion, Suspension",
author = "Antonov, {D. V.} and Piskunov, {M. V.} and Strizhak, {P. A.}",
year = "2019",
month = "1",
day = "1",
doi = "10.1007/s12217-019-9705-2",
language = "English",
journal = "Microgravity Science and Technology",
issn = "0938-0108",
publisher = "Springer Netherlands",

}

TY - JOUR

T1 - Characteristics of the Child-Droplets Emerged by Micro-Explosion of the Heterogeneous Droplets Exposed to Conductive, Convective and Radiative Heating

AU - Antonov, D. V.

AU - Piskunov, M. V.

AU - Strizhak, P. A.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - A study provides for the experimental characteristics of the fragmentation process of the heterogeneous droplets during a strong heating. Among such characteristics are a number, a size, namely, mean, minimum and maximum one, and a total surface area of the child-droplets emerged. We consider three schemes of heating corresponding to convective, conductive and radiative heat transfer. Experiments are carried out using the suspension and emulsion droplets as well as the droplets of two immiscible fluids. The graphite particles are utilized as the solid admixtures to water; diesel is applied as a liquid combustible additive. The effect of heat transfer, concentrations and a type of the admixtures on the fragmentation characteristics is explored. Temperature ranges (100–650 °C) and heat fluxes (4–150 kW/m2) are chosen according to applications, namely, fuel technologies, contact heat exchangers, thermal treatment of liquids, fire extinguishing, etc. The findings are important to develop the technologies based on a secondary atomization of the droplets during overheating and boiling. The results of the conductive heating experiments define the optimum substrate temperatures ensuring an enhanced micro-explosion of the droplets of different composition. The radiative heating is characterized by a strong droplet breakup leading to a greater number of the child-droplets as compared to the conductive and convective one. The conclusions contain future ways of developing the study. [Figure not available: see fulltext.].

AB - A study provides for the experimental characteristics of the fragmentation process of the heterogeneous droplets during a strong heating. Among such characteristics are a number, a size, namely, mean, minimum and maximum one, and a total surface area of the child-droplets emerged. We consider three schemes of heating corresponding to convective, conductive and radiative heat transfer. Experiments are carried out using the suspension and emulsion droplets as well as the droplets of two immiscible fluids. The graphite particles are utilized as the solid admixtures to water; diesel is applied as a liquid combustible additive. The effect of heat transfer, concentrations and a type of the admixtures on the fragmentation characteristics is explored. Temperature ranges (100–650 °C) and heat fluxes (4–150 kW/m2) are chosen according to applications, namely, fuel technologies, contact heat exchangers, thermal treatment of liquids, fire extinguishing, etc. The findings are important to develop the technologies based on a secondary atomization of the droplets during overheating and boiling. The results of the conductive heating experiments define the optimum substrate temperatures ensuring an enhanced micro-explosion of the droplets of different composition. The radiative heating is characterized by a strong droplet breakup leading to a greater number of the child-droplets as compared to the conductive and convective one. The conclusions contain future ways of developing the study. [Figure not available: see fulltext.].

KW - Child-droplet

KW - Emulsion

KW - Heat transfer

KW - Immiscible fluid

KW - Micro-explosion

KW - Suspension

UR - http://www.scopus.com/inward/record.url?scp=85066810302&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85066810302&partnerID=8YFLogxK

U2 - 10.1007/s12217-019-9705-2

DO - 10.1007/s12217-019-9705-2

M3 - Article

JO - Microgravity Science and Technology

JF - Microgravity Science and Technology

SN - 0938-0108

ER -