Providing an Analytical Model in Determining Nanofluids

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SHAHRIARI A.; JAHANTIGH N.; RAKANI F.

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Journal Paper

Paper Information

Journal: International Journal of Engineering Year:2017 | Volume:30 | Issue:12 (TRANSACTIONS C: Aspects) Page(s): 1919-1924

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Title

Providing an Analytical Model in Determining Nanofluids

Author(s)

SHAHRIARI A. | JAHANTIGH N. | RAKANI F. | Issue Writer Certificate

Keywords

Effective Viscosity

Mean Nanoparticle Diameter

Nanofluid

Thermophysical Properties

Volume Concentration

Abstract

The influence of temperature, mean nanoparticle size and the nanoparticle concentration on the dynamic viscosities of Nanofluids are investigated in an analytical method followed by introduction of modified equations for calculating the Nanofluids’ viscosities. A new correlation is developed for Effective Viscosity based on the previous model where the Brownian movement of the nanoparticles is considered as the key mechanism. In previous studies, the proposed models were not appropriate for nanoparticles larger than 36 nm. They were also focused on low concentrations of nanoparticles up to 5%. The possibility of homogeneous dispersion of the nanoparticles and the Stokes law are observed here. This new model is explained in terms of temperature, Mean Nanoparticle Diameter, nanoparticle Volume Concentration and both the nanoparticle and base fluid thermophysical characteristics for the Effective Viscosity of Nanofluids. A combined correction factor is introduced to take into account the simplification for a free stream boundary condition outside the boundary layer. A good agreement is observed between the Effective Viscosity obtained in this new model and those of recorded experiments conducted for different Nanofluids. The results show that the present model is valid for large Volume Concentration (0% < φ <11%), mean nanoparticle size (13 nm < dp < 95 nm), temperature variations (290 K

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APA: Copy

SHAHRIARI, A., JAHANTIGH, N., & RAKANI, F.. (2017). Providing an Analytical Model in Determining Nanofluids. INTERNATIONAL JOURNAL OF ENGINEERING, 30(12 (TRANSACTIONS C: Aspects)), 1919-1924. SID. https://sid.ir/paper/731114/en

Vancouver: Copy

SHAHRIARI A., JAHANTIGH N., RAKANI F.. Providing an Analytical Model in Determining Nanofluids. INTERNATIONAL JOURNAL OF ENGINEERING[Internet]. 2017;30(12 (TRANSACTIONS C: Aspects)):1919-1924. Available from: https://sid.ir/paper/731114/en

IEEE: Copy

A. SHAHRIARI, N. JAHANTIGH, and F. RAKANI, “Providing an Analytical Model in Determining Nanofluids,” INTERNATIONAL JOURNAL OF ENGINEERING, vol. 30, no. 12 (TRANSACTIONS C: Aspects), pp. 1919–1924, 2017, [Online]. Available: https://sid.ir/paper/731114/en

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