Permeability for cross flow through columnar-dendritic alloys View Full Text


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Article Info

DATE

1995-10

AUTHORS

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

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. More... »

PAGES

1049-1056

References to SciGraph publications

  • 1970-08. The origin of freckles in unidirectionally solidified castings in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1990-02. Conservation of mass and momentum for the flow of interdendritic liquid during solidification in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1970-02. Macrosegregation in ternary alloys in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1992-08-01. On the drag of model dendrite Fragments at Low Reynolds Number in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1985-12. Flow of interdendritic liquid and permeability in pb-20 Wt Pct Sn alloys in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1974-12. Specific permeability of partially solidified dendritic networks of Al-Si alloys in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1993-10. Calculation of dendrite settling velocities using a porous envelope in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1987-03. Permeability for flow of interdendritic liquid in columnar-dendritic alloys in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1988-07. Channel formation in Pb-Sn, Pb-Sb, and Pb-Sn-Sb alloy ingots and comparison with the system NH4CI-H2O in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1970-05. Interdendritic fluid flow and macrosegregation; influence of gravity in METALLURGICAL AND MATERIALS TRANSACTIONS B
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    http://scigraph.springernature.com/pub.10.1007/bf02654107

    DOI

    http://dx.doi.org/10.1007/bf02654107

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1028388157


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