Implications of zero gravity for producing new glasses in space

Happe, R. A.

doi:10.1016/0022-3093(70)90006-2

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1982

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Cited by 9 publications

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“…The Reynolds number (R) of the flow was ...... 10 3 based on the average velocity through the annular region between the sample and the tube. Calculations using the standard formulas for the drag force in a gas flOW 14 indicate that R ...... 10 3 is sufficient to levitate spheres of densities (1-11 gm/cm 3 ) used in these experiments. Other calculations based on plane Poiseuille flows show that a vertical pressure gradient of -10 4 dyne/cm 3 could be established in the flow around the sample.…”

Section: Lens and Screen For Viewing Samplementioning

confidence: 98%

Containerless melting and solidification of materials with an aerodynamic levitation system

Oran

Bergé

1982

Review of Scientific Instruments

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A simple aerodynamic system which can heat, melt, cool, and solidify (in a containerless fashion) small, roughly spherical (diameter 1.5-4 mm) samples of materials is described. The principal components of the system are an aerodynamic levitation tube and an elliptical radiant heater. The materials processed, i.e., melted and resolidified, in the system include lead and an alkali borosilicate glass. The processing of a glass bead is described. In addition, the physical phenomena which may generate the levitation force in the tube are briefly discussed.

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Section: Lens and Screen For Viewing Samplementioning

confidence: 98%