Persistent Link:
http://hdl.handle.net/10150/191880
Title:
Permeability models for flow in partially solid alloys
Author:
Djennas, Farid,1955-
Issue Date:
1986
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
In order to characterize the flow of interdendritic liquid through the solid-liquid zones of solidifying alloys, it is necessary to have permeability data. Permeability data from five different sources were analyzed by using models based upon the volume fraction of liquid, and the primary and secondary dendrite arm spacings. Three different models were tested, of which two have a physical basis: the Blake-Kozeny model and the Hagen-Poiseuille model; the third model is empirical. Metal as well as nonmetal specimen data were used in this study. The fraction liquid range for all data varied from 0.077 to 0.606, the primary dendrite arm spacing from 28 pm to 420 pm and the secondary dendrite arm spacing from 23 pm to 146 pm. Data for flow parallel as well as perpendicular to the primary dendrite arms were used in order to model the two-dimensional permeability. For parallel flow, the Hagen-Poiseuille model gives the best agreement between calculated and measured permeabilities with an average deviation of 37 percent. However for normal flow, the empirical model gives the best results with an average deviation of 44 percent between calculated and measured permeabilities, and the Blake-Kozeny model correlates almost as well.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Alloys -- Permeability.; Metals -- Permeability.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Materials Science and Engineering; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Poirier, D. R.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titlePermeability models for flow in partially solid alloysen_US
dc.creatorDjennas, Farid,1955-en_US
dc.contributor.authorDjennas, Farid,1955-en_US
dc.date.issued1986en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractIn order to characterize the flow of interdendritic liquid through the solid-liquid zones of solidifying alloys, it is necessary to have permeability data. Permeability data from five different sources were analyzed by using models based upon the volume fraction of liquid, and the primary and secondary dendrite arm spacings. Three different models were tested, of which two have a physical basis: the Blake-Kozeny model and the Hagen-Poiseuille model; the third model is empirical. Metal as well as nonmetal specimen data were used in this study. The fraction liquid range for all data varied from 0.077 to 0.606, the primary dendrite arm spacing from 28 pm to 420 pm and the secondary dendrite arm spacing from 23 pm to 146 pm. Data for flow parallel as well as perpendicular to the primary dendrite arms were used in order to model the two-dimensional permeability. For parallel flow, the Hagen-Poiseuille model gives the best agreement between calculated and measured permeabilities with an average deviation of 37 percent. However for normal flow, the empirical model gives the best results with an average deviation of 44 percent between calculated and measured permeabilities, and the Blake-Kozeny model correlates almost as well.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshAlloys -- Permeability.en_US
dc.subject.lcshMetals -- Permeability.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineMaterials Science and Engineeringen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairPoirier, D. R.en_US
dc.identifier.oclc213340922en_US
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