The Influence of Thermal Radiation on Drying of Single Droplet/Wet Particle

Abstract

A literature review shows lack of the detailed research and discovers contradictions regarding influence of thermal radiation on the drying process of a single droplet, containing solids. The present study shows that for droplet initial diameters <0.25 mm and ambient temperatures <750°C, as like as for diameters <2.5 mm and ambient temperatures up to 200°C, the effect of thermal radiation is negligible. At the same time, for droplets with initial diameter greater than 0.5 mm and temperatures of the drying agent higher than 400°C, thermal radiation plays a substantial part in the drying process.

Keywords:

• Drying
• Emissivity
• Single droplet
• Thermal radiation
• Wet particle

ACKNOWLEDGEMENTS

We thank the Israel Ministry of Immigrant Absorption for partial support of this work.