Numerical Simulation of Water/Al2O3 Nanofluid Turbulent Convection | Zendy

Vincenzo Bianco | Zendy; Oronzio Manca | Zendy; Sergio Nardini | Zendy

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Numerical Simulation of Water/Al₂O₃ Nanofluid Turbulent Convection

Author(s) -

Vincenzo Bianco,

Oronzio Manca,

Sergio Nardini

Publication year - 2010

Publication title -

advances in mechanical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 40

eISSN - 1687-8140

pISSN - 1687-8132

DOI - 10.1155/2010/976254

Subject(s) - nanofluid , turbulence , mechanics , thermodynamics , materials science , reynolds number , convection , convective heat transfer , heat transfer , heat transfer coefficient , forced convection , physics

Turbulent forced convection flow of a water-Al 2 O 3 nanofluid in a circular tube subjected to a constant and uniform temperature at the wall is numerically analyzed. The two-phase mixture model is employed to simulate the nanofluid convection, taking into account appropriate thermophysical properties. Particles are assumed spherical with a diameter equal to 38 nm. It is found that convective heat transfer coefficient for nanofluids is greater than that of the base liquid. Heat transfer enhancement is increasing with the particle volume concentration and Reynolds number. Comparisons with correlations present in the literature are accomplished and a very good agreement is found with Pak and Cho (1998). As for the friction factor, it shows a good agreement with the classical correlation used for normal fluid, such as Blasius formula.

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