Actions for Modeling of convection phenomena in Bridgman-Stockbarger crystal growth

Email RIS file
Bookmark
Report an Issue

Modeling of convection phenomena in Bridgman-Stockbarger crystal growth

Author
Sheu, J. Z.
Published
Nov 5, 1985.
Physical Description
1 electronic document
Additional Creators
Eraslan, A. H. and Carlson, F. M.
Online Version

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
Thermal convection phenomena in a vertically oriented Bridgman-Stockbarger apparatus were modeled by computer simulations for different gravity conditions, ranging from earth conditions to extremely low gravity, approximate space conditions. The modeling results were obtained by the application of a state-of-the art, transient, multi-dimensional, completely densimetrically coupled, discrete-element computational model which was specifically developed for the simulation of flow, temperature, and species concentration conditions in two-phase (solid-liquid) systems. The computational model was applied to the simulation of the flow and the thermal conditions associated with the convection phenomena in a modified Germanium-Silicon charge enclosed in a stationary fused-silica ampoule. The results clearly indicated that the gravitational field strength influences the characteristics of the coherent vortical flow patterns, interface shape and position, maximum melt velocity, and interfacial normal temperature gradient.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19860003720.
Accession ID: 86N13188.
NAS 1.26:176325.
NASA-CR-176325.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15703743