Effect of spacecraft rotation on convection and impurity segregation during the growth of crystals from a melt under microgravity

It is shown that convection and impurity transport in a melt originating due to variations in spacecraft rotation are determined by the combined action of the buoyancy force generated by the resultant microacceleration vector and the inertia force connected with variations of the spacecraft rotation...

Full description

Saved in:
Bibliographic Details
Published in:Journal of crystal growth 1999-03, Vol.198, p.182-187
Main Authors: Polovko, Yu.A., Sazonov, V.V., Yuferev, V.S.
Format: Article
Language:English
Subjects:
Crystal growth
Impurity
Melt
Microgravity
Simulation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It is shown that convection and impurity transport in a melt originating due to variations in spacecraft rotation are determined by the combined action of the buoyancy force generated by the resultant microacceleration vector and the inertia force connected with variations of the spacecraft rotation rate. As a result, the inhomogeneity in impurity distribution are strongly dependent on the angle between the temperature gradient at some point in the melt and the radius vector of this point relative to the spacecraft's centroid. A numerical simulation is performed for convection and impurity segregation in a cube container with rotation of an unmanned satellite of Photon type and the Space Shuttle orbiter.
ISSN:0022-0248
1873-5002
DOI:10.1016/S0022-0248(98)01154-3