Wetting and coalescence prevention of drops in a liquid matrix. Ground and parabolic flight results
| Autor: | Raffaele Savino, F. Nota, S. Fico |
|---|---|
| Přispěvatelé: | Savino, Raffaele, Nota, F., Fico, S. |
| Rok vydání: | 2003 |
| Předmět: |
Coalescence (physics)
Marangoni effect Buoyancy Sounding rocket Materials science business.industry Applied Mathematics Fluorinert Drop (liquid) General Engineering General Physics and Astronomy Mechanics engineering.material Physics::Fluid Dynamics Optics Modeling and Simulation Thermal engineering Wetting business |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1875-0494 0938-0108 |
| DOI: | 10.1007/bf02870938 |
| Popis: | An experimental and numerical analysis of the behavior of drops in a liquid matrix, in presence of temperature differences, is carried out in preparation for a MAXUS sounding rocket flight to study wetting and coalescence prevention induced by thermal Marangoni effect. On-ground experimentation has been carried out using micro zone apparatus. Different pairs of liquids (drop and matrix) have been analyzed; wetting prevention has been observed with drops of different diameter and critical temperature differences have been measured for each pair. To avoid buoyancy effects similar experiments have been carried out during the 30th ESA parabolic flight campaign. The main objective of the experiments is facility tests in a parabolic flight for the MAXUS flight. During the parabolic flight a hanging drop of Silicone oil 10 mm diameter has been injected in a matrix of Fluorinert and in air; wetting prevention has been observed in presence of a temperature difference between the drop and the lower surface. The theoretical-numerical study of the problem has been carried out with a thermofluidynamic model based on the assumption of the existence of a fluid film between the drop and the lower surface. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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