Tailoring the pressure-drop in multi-layered open-cell porous inconel structures


This study investigates the pressure-drop behaviour associated with airflow through bulk and structurally tailored multi-layered, open-cell porous Inconel structures over a wide airflow velocity range (0–50 m s−1). The effect of airflow velocity on the pressure-drop behaviour as a function of the sample thickness is presented and related to the flow behaviour corresponding to the relevant flow regimes (Darcy, Forchheimer, Turbulent and Post-turbulent). Entrance effects are highlighted as a source of the pressure-drop increase for porous structures with air gaps, regardless of their sizes, as long as they are larger than those generated by loosely-stacked structures. The pressure-drops for gapped porous structures and the mathematical-summation of the pressure drop for the corresponding individual components, were in very good agreement, at lower airflow velocities. The potential for mass-efficient porous structures, providing a high pressure-drop, was demonstrated using multiple thin porous laminates separated by air gaps.

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  1. 1.

    N. Dukhan, Exp. Fluids 41, 4665–4672 (2006)

    Article  Google Scholar 

  2. 2.

    M. Medraj, E. Baril, V. Loya, L.P. Lefebvre, J. Mater. Sci. 42, 4372–4383 (2007)

    CAS  Article  Google Scholar 

  3. 3.

    E. Baril, A. Mostafid, L.P. Lefebvre, M. Medraj, Adv. Eng. Mater. 10, 889–894 (2008)

    CAS  Article  Google Scholar 

  4. 4.

    S. Mancin, C. Zilio, A. Cavallini, L. Rossetto, Int. J. Heat Mass Transf. 53, 3121–3130 (2010)

    Article  Google Scholar 

  5. 5.

    W. Azzi, W. Roberts, A. Rabiei, Mater. Des. 28, 569–574 (2007)

    Article  Google Scholar 

  6. 6.

    N. Dukhan, C. Minjeur II, J. Porous Mater. 18, 417–424 (2011)

    CAS  Article  Google Scholar 

  7. 7.

    N. Dukhan, Metal Foams: Fundamentals and Applications (Destech Publications, Lancaster, 2013), pp. 31–45

    Google Scholar 

  8. 8.

    D. Ingham, I. Pop, Transport Phenomena in Porous Media, 1st edn. (Elsevier Science, Oxford, 1998)

    Google Scholar 

  9. 9.

    H. Oun, A. Kennedy, J. Porous Mater. 21, 1133–1141 (2014)

    CAS  Article  Google Scholar 

  10. 10.

    P. Khayargoli, V. Loya, L.P. Lefebvre, M. Medraj, Presented at the CSME Forum (Can. Soc. Mech. Eng, Ontario, 2004)

    Google Scholar 

  11. 11.

    K. Boomsma, D. Poulikakos, ASME J. Fluids Eng. 124, 263–272 (2002)

    CAS  Article  Google Scholar 

  12. 12.

    C.Y. Zhao, T. Kim, T.J. Lu, H.P. Hodson, Thermal transport phenomena in Porvair metal foams and sintered beds. (Fuel Cell Markets web, 2001), http://www.fuelcellmarkets.com/fuel_cell_. Accessed 26 Mar 2013

  13. 13.

    N. Dukhan, M. Ali, Presented at the 7th international conference on porous metals and metallic foams (BEXCO, Busan, Korea, 2011)

  14. 14.

    O. Gerbaux, T. Vercueil, A. Memponteil, B. Bador, Chem. Eng. Sci. 64, 4186–4195 (2009)

    CAS  Article  Google Scholar 

  15. 15.

    N. Dukhan, K. Patel, Presented at the 3rd international conference on porous media and its applications in science, engineering and industry (The II Ciocco Hotal and conference centre, Tuscany, Italy, 2010)

  16. 16.

    N. Dukhan, M. Ali, Int. J. Therm. Sci. 57, 85–91 (2012)

    CAS  Article  Google Scholar 

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Correspondence to Hatem Oun.

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Oun, H., Kennedy, A. Tailoring the pressure-drop in multi-layered open-cell porous inconel structures. J Porous Mater 22, 1627–1633 (2015). https://doi.org/10.1007/s10934-015-0046-2

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  • Single-phase flow
  • Inconel multi-layer porous structures
  • Thickness effect
  • Material-efficient structures
  • Air gap effect