DENDRITIC GROWTH VELOCITIES IN MICROGRAVITY

被引：201

作者：

GLICKSMAN, ME ^{[1
]}

KOSS, MB

WINSA, EA

机构：

[1] RENSSELAER POLYTECH INST, DEPT MAT ENGN, TROY, NY 12180 USA

[2] NASA, LEWIS RES CTR, DIV SPACE EXPT, CLEVELAND, OH 44135 USA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.73.573

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measured dendritic tip velocities in pure succinonitrile (SCN) in microgravity, using a sequence of telemetered binary images sent to Earth from the space shuttle Columbia (STS-62). Growth velocities were measured as a function of the supercooling over the range 0.05-1.5 K. Microgravity observations show that buoyancy-induced convection alters the growth kinetics of SCN dendrites at supercoolings as high as 1.3 K. Also, the dendrite velocity data measured under microgravity agree well with the Ivantsov paraboloidal diffusion solution when coupled to a scaling constant of sigma* = 0.0157.

引用

页码：573 / 576

页数：4