| Full text | |
| Author(s): |
Santos, Leandra P.
;
da Silva, Douglas S.
;
Galembeck, Andre
;
Galembeck, Fernando
;
IEEE
Total Authors: 5
|
| Document type: | Journal article |
| Source: | 2020 IEEE INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING; v. N/A, p. 9-pg., 2020-01-01. |
| Abstract | |
Applying 0.3 to 1.25 kV/cm electric potential gradients to cooled water vapor triggers the copious formation of electrified ice needles, as long as 36 millimeters. This is completely different from the meager ice formation in the same set-up but in the absence of the external field. Needle excess electric charge is evidenced by its attraction towards the electrodes and by its collapse when the field is withdrawn. These observations are explained considering i) the effect of the electric potential on ice surface tension, thus decreasing or eliminating the energy barrier to ice nucleation and ii) the elongated ice habit that allows the accumulation of charge sufficient to create fields higher than those initially applied. The present results show that ice formation under electric potentials that are easily found in natural and anthropic environments enhances charge separation and storage during water vapor condensation and perhaps in other water phase change events. (AU) | |
| FAPESP's process: | 18/00834-2 - Conductive inks, adhesives and coatings made with exfoliated graphite, applied to making electrical components and circuits |
| Grantee: | Fernando Galembeck |
| Support Opportunities: | Research Grants - Innovative Research in Small Business - PIPE |
| FAPESP's process: | 19/04565-9 - Conductive inks, adhesives and coatings made with exfoliated graphite, applied to making electrical components and circuits |
| Grantee: | Leandra Pereira dos Santos |
| Support Opportunities: | Scholarships in Brazil - Innovative Research in Small Business - PIPE |