NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Effects of gravity on interdendritic flow - An analytic approachThe present investigation attempts to provide an aid to the understanding of the essence of the gravitational influence on interdendritic flow. An analytic solution of the equations governing interdendritic fluid flow is presented for a simple case, involving a semiinfinite mushy zone whose isotherms are flat, parallel, and inclined at an angle to the force of gravity. It is found that gravity in ingots with narrow mushy zones mainly produces interdendritic flow parallel to the liquidus confined to the vicinity of the liquidus. This flow can be large in comparison to the usual shrinkage-induced flows. Its existence is caused by the rapid increase of permeability with fraction liquid near the liquidus. For this reason, it cannot appear in numerical calculations which ignore the rapid variation of permeability.
Document ID
19850032765
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Simpson, M.
(Norton Research Corp. (Canada), Ltd., Niagara Falls, Canada)
Flemings, M. C.
(MIT Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
November 1, 1984
Publication Information
Publication: Metallurgical Transactions A - Physical Metallurgy and Materials Science
Volume: 15A
ISSN: 0360-2133
Subject Category
Solid-State Physics
Accession Number
85A14916
Funding Number(s)
CONTRACT_GRANT: NSG-7645
CONTRACT_GRANT: NSF DMR-79-24268
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available