The Effect of the Substrate Temperature and the Height of the Mini-Channel on the Evaporation of Liquid Droplet Blown by the Gas Flow

Ekaterina Isachenko,Evgeniy Orlik,Oleg Kabov

doi:10.1051/matecconf/20167201038

Abstract

The experimental setup has been designed and fabricated to study the evaporation of liquid droplets, blown by the gas flow in a mini-channel with a height of 6 and 9 mm. Substrates were removable, and the surface temperature of the substrate was maintained at a constant level. The shadow method was the main method of measurement. A series of experiments with a water drop of 100 μl volume settled on a polished stainless substrate were carried out. As a result the dependences for the droplet evaporation rate were obtained in the range of temperatures 25–70 °C and Reynolds numbers of gas 0–2000.

Highlights

Drop is a fairly simple physical object, including complex physical processes and interactions
The first series of experimental data was obtained at constant substrate temperature of 25 qC and at different air flow velocities in the channel of 6 mm and 9 mm height
In the 6 mm channel, the drop lifetime is significantly less than in the 9 mm channel. This may be explained by the fact that at the same Reynolds numbers, the gas velocity in the 6 mm channel is higher than in the 9 mm channel

Summary

Introduction

Drop is a fairly simple physical object, including complex physical processes and interactions. The evaporation of droplets has been widely studied numerically and experimentally, but mostly in motionless air. The studies show that the contact angle and its hysteresis have a significant impact on droplet evaporation [1, 2, 3].

Objectives

Results

Conclusion