Duration of Periods of Temperature Decreasing in the Wake of a Time-Discrete Flow of Water Droplets Moving through High-Temperature Gases

2020 ◽  
Vol 29 (2) ◽  
pp. 267-278
Author(s):  
I. S. Voytkov ◽  
N. E. Shlegel ◽  
O. V. Vysokomornaya
Keyword(s):  
High Temperature ◽  
Water Droplets ◽  
Discrete Flow

scholarly journals Investigation of Regularities of Heat and Mass Transfer and Phase Transitions during Water Droplets Motion through High-Temperature Gases

2014 ◽  
Vol 6 ◽  
pp. 865856 ◽  
Author(s):  
Roman S. Volkov ◽  
Olga V. Vysokomornaya ◽  
Genii V. Kuznetsov ◽  
Pavel A. Strizhak
Keyword(s):  
Mass Transfer ◽  
Phase Transitions ◽  
High Temperature ◽  
Heat And Mass Transfer ◽  
Water Droplet ◽  
Small Neighborhood ◽  
Droplet Evaporation ◽  
Optical Methods ◽  
Water Droplets ◽  
Two Phase

The macroscopic regularities of heat and mass transfer and phase transitions during water droplets motion through high-temperature (more than 1000 K) gases have been investigated numerically and experimentally. Water droplet evaporation rates have been established. Gas and water vapors concentrations and also temperature values of gas-vapor mixture in small neighborhood and water droplet trace have been singled out. Possible mechanisms of droplet coagulation in high-temperature gas area have been determined. Experiments have been carried out with the optical methods of two-phase gas-vapor-droplet mixtures diagnostics (“Particle Image Velocimetry” and “Interferometric Particle Imaging”) usage to assess the adequateness of developed heat and mass transfer models and the results of numerical investigations. The good agreement of numerical and experimental investigation results due to integral characteristics of water droplet evaporation has been received.

Contact Angle of Water Droplets in High Temperature and High Pressure environment

2003 ◽  
Vol 2003.3 (0) ◽  
pp. 265-266
Author(s):  
Naohisa TAMURA ◽  
Norihiro FUKAMACHI ◽  
Tatsuya HAZUKU ◽  
Tomoji TAKAMASA ◽  
Kenrou TAKAMORI
Keyword(s):  
Contact Angle ◽  
High Pressure ◽  
High Temperature ◽  
Water Droplets ◽  
High Pressure Environment

The High-Temperature Evaporation of Water Droplets in a Gaseous Medium

2017 ◽  
Vol 62 (12) ◽  
pp. 1908-1911 ◽  
Author(s):  
I. S. Voitkov ◽  
R. S. Volkov ◽  
G. V. Kuznetsov ◽  
P. A. Strizhak
Keyword(s):  
High Temperature ◽  
Gaseous Medium ◽  
Water Droplets

scholarly journals Difference Of Evaporation and Boiling for Heterogeneous Water Droplets in a High-Temperature Gas

2015 ◽  
Vol 37 ◽  
pp. 01027 ◽  
Author(s):  
Jean Claude Legros ◽  
Maxim V. Piskunov ◽  
Pavel A. Strizhak
Keyword(s):  
High Temperature ◽  
Water Droplets ◽  
High Temperature Gas

Contact Angle of Water Droplets in a High-Temperature, High-Pressure Environment

2004 ◽  
Author(s):  
Tsukasa Hayashi ◽  
Tatsuya Hazuku ◽  
Tomoji Takamasa ◽  
Kenrou Takamori
Keyword(s):  
Contact Angle ◽  
High Pressure ◽  
High Temperature ◽  
Contact Angles ◽  
Surface Wettability ◽  
Water Droplets ◽  
Straight Line ◽  
Angle Condition ◽  
High Pressure Environment ◽  
High Temperature High Pressure

This paper presents an experimental study of surface wettability on a stainless plate in a high-temperature, high-pressure environment. Using a pressure vessel, we measured contact angles of water droplets at temperatures from 20 to 300°C and a constant pressure of 15 MPa, as an indicator of macroscopic surface wettability. Measured contact angles decreased with temperature below 250°C, clustering around a straight line at temperatures below 120°C and around another line in the range from 120 to 250°C. At temperatures above 250°C, on the other hand, the contact angles remained constant, independent of temperature, and contrary to the existing theoretical model, no highly hydrophilic condition or null contact angle condition was achieved.

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