Unsteady temperature fields of evaporating water droplets exposed to conductive, convective and radiative heating

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

In this paper, we present the rates and typical durations of high-temperature heating and evaporation of water droplets determined for the dominating conductive, convective or radiative energy supply. We developed three setups for heating a water droplet: on a substrate (conduction), in a muffle furnace (radiation), and in a heated airflow (convection). The heating temperature is up to 1000 °C to correspond high-temperature technologies, namely thermal cleaning of fluids, polydisperse fire extinguishing with low water consumption, etc. With the help using of a high-speed video recording system, we determine the water droplet lifetimes (the times of their complete evaporation). Using Planar Laser Induced Fluorescence, we establish the quantitative differences between the water droplet heating rates (heating time to lifetime ratios) on the three setups. Maximum temperatures are determined that the water droplets reach when exposed to different heating mechanisms. Furthermore, we obtain the criterial dependences to connect the main attributes of temperature field generation of an evaporating water droplet with the heating conditions. Finally, we identify possible implications of the research findings and ways to further improve the newly developed experimental approach.

Original languageEnglish
Pages (from-to)340-355
Number of pages16
JournalApplied Thermal Engineering
Volume131
DOIs
Publication statusPublished - 25 Feb 2018

Fingerprint

Temperature distribution
Heating
Water
Evaporation
Video recording
Temperature
Heat radiation
Heating rate
Cleaning
Fires
Fluorescence
Fluids
Lasers
Substrates

Keywords

  • Conductive, convective, radiative heating
  • Heating and evaporation rates
  • Planar Laser Induced Fluorescence
  • Unsteady temperature field
  • Water droplet

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Cite this

@article{16756a0e15be42ffa475af66fac30294,
title = "Unsteady temperature fields of evaporating water droplets exposed to conductive, convective and radiative heating",
abstract = "In this paper, we present the rates and typical durations of high-temperature heating and evaporation of water droplets determined for the dominating conductive, convective or radiative energy supply. We developed three setups for heating a water droplet: on a substrate (conduction), in a muffle furnace (radiation), and in a heated airflow (convection). The heating temperature is up to 1000 °C to correspond high-temperature technologies, namely thermal cleaning of fluids, polydisperse fire extinguishing with low water consumption, etc. With the help using of a high-speed video recording system, we determine the water droplet lifetimes (the times of their complete evaporation). Using Planar Laser Induced Fluorescence, we establish the quantitative differences between the water droplet heating rates (heating time to lifetime ratios) on the three setups. Maximum temperatures are determined that the water droplets reach when exposed to different heating mechanisms. Furthermore, we obtain the criterial dependences to connect the main attributes of temperature field generation of an evaporating water droplet with the heating conditions. Finally, we identify possible implications of the research findings and ways to further improve the newly developed experimental approach.",
keywords = "Conductive, convective, radiative heating, Heating and evaporation rates, Planar Laser Induced Fluorescence, Unsteady temperature field, Water droplet",
author = "Kuznetsov, {G. V.} and Piskunov, {M. V.} and Volkov, {R. S.} and Strizhak, {P. A.}",
year = "2018",
month = "2",
day = "25",
doi = "10.1016/j.applthermaleng.2017.12.021",
language = "English",
volume = "131",
pages = "340--355",
journal = "Applied Thermal Engineering",
issn = "1359-4311",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Unsteady temperature fields of evaporating water droplets exposed to conductive, convective and radiative heating

AU - Kuznetsov, G. V.

AU - Piskunov, M. V.

AU - Volkov, R. S.

AU - Strizhak, P. A.

PY - 2018/2/25

Y1 - 2018/2/25

N2 - In this paper, we present the rates and typical durations of high-temperature heating and evaporation of water droplets determined for the dominating conductive, convective or radiative energy supply. We developed three setups for heating a water droplet: on a substrate (conduction), in a muffle furnace (radiation), and in a heated airflow (convection). The heating temperature is up to 1000 °C to correspond high-temperature technologies, namely thermal cleaning of fluids, polydisperse fire extinguishing with low water consumption, etc. With the help using of a high-speed video recording system, we determine the water droplet lifetimes (the times of their complete evaporation). Using Planar Laser Induced Fluorescence, we establish the quantitative differences between the water droplet heating rates (heating time to lifetime ratios) on the three setups. Maximum temperatures are determined that the water droplets reach when exposed to different heating mechanisms. Furthermore, we obtain the criterial dependences to connect the main attributes of temperature field generation of an evaporating water droplet with the heating conditions. Finally, we identify possible implications of the research findings and ways to further improve the newly developed experimental approach.

AB - In this paper, we present the rates and typical durations of high-temperature heating and evaporation of water droplets determined for the dominating conductive, convective or radiative energy supply. We developed three setups for heating a water droplet: on a substrate (conduction), in a muffle furnace (radiation), and in a heated airflow (convection). The heating temperature is up to 1000 °C to correspond high-temperature technologies, namely thermal cleaning of fluids, polydisperse fire extinguishing with low water consumption, etc. With the help using of a high-speed video recording system, we determine the water droplet lifetimes (the times of their complete evaporation). Using Planar Laser Induced Fluorescence, we establish the quantitative differences between the water droplet heating rates (heating time to lifetime ratios) on the three setups. Maximum temperatures are determined that the water droplets reach when exposed to different heating mechanisms. Furthermore, we obtain the criterial dependences to connect the main attributes of temperature field generation of an evaporating water droplet with the heating conditions. Finally, we identify possible implications of the research findings and ways to further improve the newly developed experimental approach.

KW - Conductive, convective, radiative heating

KW - Heating and evaporation rates

KW - Planar Laser Induced Fluorescence

KW - Unsteady temperature field

KW - Water droplet

UR - http://www.scopus.com/inward/record.url?scp=85037708710&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85037708710&partnerID=8YFLogxK

U2 - 10.1016/j.applthermaleng.2017.12.021

DO - 10.1016/j.applthermaleng.2017.12.021

M3 - Article

VL - 131

SP - 340

EP - 355

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

ER -