Permeability for cross flow through columnar-dendritic alloys

M. S. Bhat, D. R. Poirier, J. C. Heinrich

Research output: Contribution to journalArticle

112 Scopus citations

Abstract

Experiments for measuring permeability in columnar-dendritic microstructures have provided data only up to a volume fraction of liquid of 0.66. Hence, the permeability for flow perpendicular to the primary dendrite arms in columnar-dendritic microstructures was calculated, extending our data base for permeability to volume fractions of liquid as high as 0.98. Analyses of the dendritic microstructures were undertaken first by detecting the solid-liquid interfaces with a special computer program and then by generating a mesh for a finite-element fluid flow simulation. Using a Navier-Stokes solver, the velocity and pressure at the nodes were calculated at the microstructural level. In turn, the average pressure gradient was used to calculate the Darcy permeability. Permeabilities calculated by this versatile technique provided data at high volume fractions of liquid that merged with the empirical data at the lower volume fractions.

Original languageEnglish (US)
Pages (from-to)1049-1056
Number of pages8
JournalMetallurgical and Materials Transactions B
Volume26
Issue number5
DOIs
StatePublished - Oct 1 1995

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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