Metallurgical and Materials Transactions B

, Volume 44, Issue 3, pp 671–690 | Cite as

Characterization of Ceramic Foam Filters Used for Liquid Metal Filtration

  • Mark William Kennedy
  • Kexu Zhang
  • Robert Fritzsch
  • Shahid Akhtar
  • Jon Arne Bakken
  • Ragnhild E. Aune
Article

Abstract

In the current study, the morphology including tortuosity, and the permeability of 50-mm thick commercially available 30, 40, 50, and 80 pores per inch (PPI) alumina ceramic foam filters (CFFs) have been investigated. Measurements have been taken of cell (pore), window, and strut sizes, porosity, tortuosity, and liquid permeability. Water velocities from ~0.015 to 0.77 m/s have been used to derive both first-order (Darcy) and second-order (Non-Darcy) terms for being used with the Forchheimer equation. Measurements were made using 49-mm “straight through” and 101-mm diameter “expanding flow field” designs. Results from the two designs are compared with calculations made using COMSOL 4.2a® 2D axial symmetric finite element modeling (FEM), as a function of velocity and filter PPI. Permeability results are correlated using directly measurable parameters and compared with the previously published results. Development of improved wall sealing (49 mm) and elimination of wall effects (101 mm) have led to a high level of agreement between experimental, analytic, and FEM methods (±0 to 7 pct on predicted pressure drop) for both types of experiments. Tortuosity has been determined by two inductive methods, one using cold-solidified samples at 60 kHz and the other using liquid metal at 50 Hz, giving comparable results.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2013

Authors and Affiliations

  • Mark William Kennedy
    • 1
    • 2
  • Kexu Zhang
    • 1
    • 3
  • Robert Fritzsch
    • 1
  • Shahid Akhtar
    • 4
  • Jon Arne Bakken
    • 1
  • Ragnhild E. Aune
    • 1
    • 5
  1. 1.Department of Material Science and EngineeringNorwegian University of Science and Technology (NTNU)TrondheimNorway
  2. 2.Proval Partners S.A.LausanneSwitzerland
  3. 3.Wartsila Norway A.S.RubbestadnesetNorway
  4. 4.Wire Rod Cast HouseHydro Aluminium, KarmøyHåvikNorway
  5. 5.Department of Material Science and EngineeringRoyal Institute of Technology (KTH)StockholmSweden

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