search query: @keyword evaporation / total: 14
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| Author: | Myren, Jared |
| Title: | Wetting of Cryoliquid Droplets: Non-Boiling & Leidenfrost States |
| Publication type: | Master's thesis |
| Publication year: | 2016 |
| Pages: | (8) + 55 Language: eng |
| Department/School: | Perustieteiden korkeakoulu |
| Main subject: | Physics of Advanced Materials (SCI3017) |
| Supervisor: | Ras, Robin |
| Instructor: | Ras, Robin |
| Electronic version URL: | http://urn.fi/URN:NBN:fi:aalto-201604201838 |
| Location: | P1 Ark Aalto 3676 | Archive |
| Keywords: | droplet cryoliquid evaporation Leidenfrost Cassie paramagnetism |
| Abstract (eng): | This thesis presents the development of an experimental setup and testing methodology for investigating the behavior of non-boiling droplets of cryogenic liquids (cryoliquids) on cooled, super-repellent surfaces, along with preliminary measurement results from experiments performed with liquid oxygen droplets. This work was made possible and inspired by recent developments in the fabrication of doubly re-entrant nanostructured surfaces capable of repelling low surface tension fluids at room temperature, as the surface tension of cryoliquids is similarly low. No free-standing repelled droplets were achieved in this study, however two droplets were repelled while in contact with the deposition tip, indicating the potential for future testing with doubly re-entrant sample designs using this experimental approach. Additional experiments were also performed with liquid oxygen droplets in Leidenfrost states on smooth, room temperature substrates, utilizing the paramagnetism of liquid oxygen to observe low friction harmonic oscillations of droplets in a parabolic magnetic field. Analysis of these experiments showed that a modified model, originally developed for oscillating ferrofluid droplets on superhydrophobic surfaces, could be fit to oscillatory Leidenfrost droplet motion. The results suggest the potential for further studies investigating the interactions between magnetic forces and low friction droplet dynamics with low surface tension fluids. |
| ED: | 2016-05-01 |
INSSI record number: 53472
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