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Effects of nanofluid concentration and channeling on the thermal effectiveness of highly porous open-cell foam metals: a numerical and experimental study

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Abstract

The following study aimed to determine the effect of nanofluid concentration and the inclusion of porously filled channels on the thermal performance of highly porous open-cell foam metals. The study considered variable heat flux, nanofluid concentration and considered porously filled channels and bulk porous media. The nanofluid used in the experimental and numerical work was γ-Al2O3 nanoparticles suspended in water. The foam metal used was composed of 6061-T6 aluminum with a porosity of 0.91 and a permeability of 3.36e − 8 m2. The nanofluid concentrations used for the study were 0.1%, 0.3%, and 0.6% by volume. The experimental and numerical work showed good agreement with a maximum relative error between numerical and experimental temperature of 4.8% and an average error of 3.0%. The thermal performance of the system was evaluated based on Nusselt number and an index of performance including pressure effects. The results indicate that the optimal conditions for system operation are 0.6% with porously filled channels when pumping power is not considered of importance. However, should the pumping power be considered as an essential operating parameter then the optimal system conditions are 0.3% with bulk porous media.

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Acknowledgements

The authors would like to thank Ryerson University for their continued support and funding of their research and study into thermal science. As well the authors would like to thank the National Science and Engineering Research Council of Canada for their funding and support which made the successful completion of this research possible.

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Authors and Affiliations

  1. Ryerson University, 350 Victoria St., Toronto, ON, M5B2K3, Canada

    C. A. Welsford, C. S. Delisle, R. D. Plant & M. Z. Saghir

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  1. C. A. Welsford
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  2. C. S. Delisle
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  4. M. Z. Saghir
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Correspondence to C. A. Welsford.

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Welsford, C.A., Delisle, C.S., Plant, R.D. et al. Effects of nanofluid concentration and channeling on the thermal effectiveness of highly porous open-cell foam metals: a numerical and experimental study. J Therm Anal Calorim 140, 1507–1517 (2020). https://doi.org/10.1007/s10973-019-09166-9

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  • DOI: https://doi.org/10.1007/s10973-019-09166-9

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