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Journal of Enhanced Heat Transfer
Facteur d'impact: 0.562 Facteur d'impact sur 5 ans: 0.605 SJR: 0.211 SNIP: 0.361 CiteScore™: 0.33

ISSN Imprimer: 1065-5131
ISSN En ligne: 1563-5074

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2018021380
pages 387-398

COMPUTATIONAL FLUID DYNAMICS MODELING OF DEVELOPING FORCED LAMINAR CONVECTION FLOW OF AL2O3–WATER NANOFLUID IN A TWO-DIMENSIONAL RECTANGULAR SECTION CHANNEL

Vincenzo Bianco
Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti, Università degli Studi di Genova, Via All'Opera Pia 15/A, 16145 Genova, Italy
Annalisa Marchitto
University of Genoa–DIME/TEC, Division of Thermal Energy and Environmental Conditioning, Via All'Opera Pia 15/A, 16145 Genova, Italy
Federico Scarpa
University of Genoa, DIME/TEC, Division of Thermal Energy and Environmental Conditioning Via All'Opera Pia 15 A, 16145 Genoa, Italy
Luca A. Tagliafico
University of Genoa–DIME/TEC, Division of Thermal Energy and Environmental Conditioning, Via All'Opera Pia 15/A, 16145 Genova, Italy

RÉSUMÉ

We propose a numerical analysis of developing forced laminar convection flow of Al2O3–water nanofluid within a two-dimensional rectangular section channel, heated on the top wall with a constant heat flux of 1000 W/m2. The problem is replicated with the finite-element method using Comsol Multiphysics commercial software. Different cases are simulated with Reynolds numbers of 250–1000 and concentrations between 0% and 6% for particle dimensions of 20 and 40 nm. The analysis demonstrates that nanofluids provide better cooling performance with respect to base fluid. We found an increase in average Nusselt number of ~16% for dp = 20 nm and concentration of 6%, whereas an average enhancement of 13% was detected when the particle dimension was 40 nm. On the contrary, a relevant increase in pressure drop occurred when nanofluids were considered.