Experimental and numerical investigation on forced convection in circular tubes with nanofluids (Contributo in atti di convegno)

Type
Label
  • Experimental and numerical investigation on forced convection in circular tubes with nanofluids (Contributo in atti di convegno) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Alternative label
  • L. Colla, L. Fedele, O. Manca, L. Marinelli, S. Nardini (2014)
    Experimental and numerical investigation on forced convection in circular tubes with nanofluids
    in 4th Micro and Nano Flows Conference, UCL, London, UK, 7-10 settembre 2014
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • L. Colla, L. Fedele, O. Manca, L. Marinelli, S. Nardini (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto per le Tecnologie della Costruzione, Consiglio Nazionale delle Ricerche, Corso Stati Uniti 4, 35127 Padova, Italy Dipartimento di Ingegneria Industriale e dell'Informazione, Seconda Università degli Studi di Napoli, Via Roma 29, 81031 Aversa (CE), Italy (literal)
Titolo
  • Experimental and numerical investigation on forced convection in circular tubes with nanofluids (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 9781908549167 (literal)
Abstract
  • In this paper an experimental and numerical study to investigate the convective heat transfer characteristics of fully developed turbulent flow of a water-Al2O3 nanofluid in a circular tube is presented. The numerical simulations are accomplished on the experimental test section configuration. In the analysis, the fluid flow and the thermal field are assumed axial-symmetric, two-dimensional and steady state. The single-phase model is employed to model the nanofluid mixture and k-? model is used to describe the turbulent fluid flow. Experimental and numerical results are carried out for different volumetric flow rates and nanoparticles concentration values. Heat transfer convective coefficients as a function of flow rates and Reynolds numbers are presented. The results indicate that the heat transfer coefficients increase for all nanofluids concentrations compared to pure water at increasing volumetric flow rate. Heat transfer coefficient increases are observed at assigned volumetric flow rate for nanofluid mixture with higher concentrations whereas Nusselt numbers present lower values than the ones for pure water. (literal)
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