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Titlebook: Materials and Fluids Under Low Gravity; Proceedings of the I Lorenz Ratke,Hannes Walter,Berndt Feuerbacher Conference proceedings 1996 Spri

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樓主: 預(yù)兆前
11#
發(fā)表于 2025-3-23 12:09:01 | 只看該作者
,A study of morphological stability during directional solidification of a Sn?Bi alloy in microgravistages. Wavelengths and segregation patterns of microstructures corresponding to well-defined distances to threshold are characterized by post mortem analyses. The experimental results are discussed within the frame of the Mullins and Sekerka‘s theory and 3D non linear calculations.
12#
發(fā)表于 2025-3-23 15:16:46 | 只看該作者
13#
發(fā)表于 2025-3-23 18:11:17 | 只看該作者
New critical phenomena observed under weightlessness,new mechanism of heat transport, the “Piston effect”, has been discovered. This mechanism is due to the expansion of a conductive thermal boundary layer and leads to a “critical speeding up” instead of the usual “critical slowing-down”. In the presence of an external force (e.g. gravity) the boundar
14#
發(fā)表于 2025-3-23 22:22:19 | 只看該作者
Numerical solutions of thermoacoustic and buoyancy-driven transport in a near critical fluid,avier-Stokes equations of a van der Waals gas (CO.). The results have been focused on some striking behaviours compared to those obtained for normally compressible gases: i) heat equilibration is still achieved very fast under normal gravity conditions, as under zero-g conditions, by the Piston Effe
15#
發(fā)表于 2025-3-24 06:03:02 | 只看該作者
16#
發(fā)表于 2025-3-24 07:14:46 | 只看該作者
17#
發(fā)表于 2025-3-24 11:22:33 | 只看該作者
18#
發(fā)表于 2025-3-24 15:39:33 | 只看該作者
,A study of morphological stability during directional solidification of a Sn?Bi alloy in micrograviition from a planar front to a destabilized front, is investigated through the in-situ measurement of the Seebeck voltage between the ends of a directionally solidified sample. This technique allows to precisely detect the instability threshold in steady state conditions as well as during transient
19#
發(fā)表于 2025-3-24 19:04:29 | 只看該作者
Response of crystal growth experiments to time-dependent residual accelerations,be correlated with thrusted firings. The Seebeck voltage measurement is related to the response of the instantaneous average melt composition at the melt-solid interface. This allows a direct comparison of numerical simulations with the Seebeck signals obtained on USMP-1. The effects of such acceler
20#
發(fā)表于 2025-3-25 00:08:08 | 只看該作者
Growth of 20 mm diameter GaAs crystals by the floating zone technique during the D-2 Spacelab Missicond German Spacelab Mission D2. The GaAs rods were sealed in silica ampoules which contained and integrated As-source to provide controlled stoichiometry conditions. The heating system consisted of a specially designed mirror furnace. The results show that stoichiometric material was achieved withi
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