| タイトル | Scientific basis for the Isothermal Dendritic Growth Experiment - A USMP-2 space flight experiment |
| 著者（英） | Glicksman, M. E.; Winsa, E.; Hahn, R. C.; Velosa, A.; Rojas, A.; Koss, M. B. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1991-01-01
1991 |
| 言語 | eng |
| 内容記述 | NASA has planned three flight experiments, designated as the Isothermal Dendritic Growth Experiment (IDGE), to be performed on three of the United States Microgravity Payload (USMP) flights. IDGE is designed to provide microgravity data on dendritic growth for a critical test of theory. Terrestrial gravity, g sub 0, and the associated phenomenon of buoyancy driven convection, prevent a truly quantitative test of pure, diffusocapillary dendritic growth theory. However, recent theoretical analysis provides a fluid mechanics framework for estimating the effects of reduced gravity on the dendritic solidification of pure succinonitrile (SCN), the model material selected for the first IDGE flight. The results (dendritic tip radii and velocities) of the recent fully integrated ground-based tests on the IDGE prototype engineering hardware is in general agreement with the 'historical' ground based data for SCN. At undercoolings of 0.5 K or less, a microgravity environment of approximately 10 exp -3 g sub 0 or lower would have a significant difference from the g sub 0 dendritic growth of SCN. |
| NASA分類 | MATERIALS PROCESSING |
| レポートNO | 93A50455 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/314983 |
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