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Effect of particle shape on suspension stability and thermal conductivities of water-based bohemite alumina nanofluids

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  • Kim, Hyun Jin
  • Lee, Seung-Hyun
  • Lee, Ji-Hwan
  • Jang, Seok Pil

Abstract

The suspension stability and thermal conductivity of water-based bohemite alumina nanofluids created using nanoparticles of various shapes (brick, platelet, and blade) at concentrations from 0.3 vol% to 7.0 vol% were theoretically and experimentally investigated. To quantitatively examine the effect of nanoparticle shape on suspension stability, this study uses the laser-scattering method rather than the zeta-potential measurement or the sedimentation test because both the zeta-potential and sedimentation tests cannot systematically represent the suspension stability of nanofluids. Using the DLVO (Derjaguin and Landau, Verwey and Overbeek) theory, we explain why the suspension stability varies with nanoparticle shape despite similar volume fraction of nanoparticles, pH, and temperature. The thermal conductivities are also measured by the transient hot wire method, which was developed in house. Experimental data are compared with theoretical results predicted by the Hamilton–Crosser model, which considers the effect of nanoparticle shape. It is shown that the model cannot predict nanofluids thermal conductivity relative to nanoparticle shape. Finally it is clearly shown that the thermal conductivity of nanofluids strongly depends on the suspension stability of bohemite alumina with various shapes.

Suggested Citation

  • Kim, Hyun Jin & Lee, Seung-Hyun & Lee, Ji-Hwan & Jang, Seok Pil, 2015. "Effect of particle shape on suspension stability and thermal conductivities of water-based bohemite alumina nanofluids," Energy, Elsevier, vol. 90(P2), pages 1290-1297.
    • Handle: RePEc:eee:energy:v:90:y:2015:i:p2:p:1290-1297
    DOI: 10.1016/j.energy.2015.06.084
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    Cited by:

    1. Alhuyi Nazari, Mohammad & Ahmadi, Mohammad H. & Ghasempour, Roghayeh & Shafii, Mohammad Behshad, 2018. "How to improve the thermal performance of pulsating heat pipes: A review on working fluid," Renewable and Sustainable Energy Reviews, Elsevier, vol. 91(C), pages 630-638.
    2. Manikandan, S. & Rajan, K.S., 2016. "Sand-propylene glycol-water nanofluids for improved solar energy collection," Energy, Elsevier, vol. 113(C), pages 917-929.
    3. Moucun Yang & Sa Wang & Yuezhao Zhu & Robert A. Taylor & M.A. Moghimi & Yinfeng Wang, 2020. "Thermal Stability and Performance Testing of Oil-based CuO Nanofluids for Solar Thermal Applications," Energies, MDPI, vol. 13(4), pages 1-16, February.
    4. Sadegh Hosseini, Seyed Mohammad & Dehaj, Mohammad Shafiey, 2021. "An experimental study on energetic performance evaluation of a parabolic trough solar collector operating with Al2O3/water and GO/water nanofluids," Energy, Elsevier, vol. 234(C).
    5. Garud, Kunal Sandip & Lee, Moo-Yeon, 2022. "Thermodynamic, environmental and economic analyses of photovoltaic/thermal-thermoelectric generator system using single and hybrid particle nanofluids," Energy, Elsevier, vol. 255(C).
    6. Lee, Seung-Hyun & Choi, Tae Jong & Jang, Seok Pil, 2016. "Thermal efficiency comparison: Surface-based solar receivers with conventional fluids and volumetric solar receivers with nanofluids," Energy, Elsevier, vol. 115(P1), pages 404-417.
    7. Xia Chen & Mingxuan Zhang & Yuting Wu & Chongfang Ma, 2023. "Advances in High-Temperature Molten Salt-Based Carbon Nanofluid Research," Energies, MDPI, vol. 16(5), pages 1-28, February.
    8. Wang, Jin & Yang, Xian & Klemeš, Jiří Jaromír & Tian, Ke & Ma, Ting & Sunden, Bengt, 2023. "A review on nanofluid stability: preparation and application," Renewable and Sustainable Energy Reviews, Elsevier, vol. 188(C).

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