NORM
发表于 2025-3-23 12:09:01
,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.
哑剧
发表于 2025-3-23 15:16:46
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发表于 2025-3-23 18:11:17
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
jet-lag
发表于 2025-3-23 22:22:19
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
theta-waves
发表于 2025-3-24 06:03:02
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勤勉
发表于 2025-3-24 07:14:46
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领带
发表于 2025-3-24 11:22:33
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VOC
发表于 2025-3-24 15:39:33
,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
coagulation
发表于 2025-3-24 19:04:29
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
商品
发表于 2025-3-25 00:08:08
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