Experimental study of turbulent forced convection of nanofluid in channels with cylindrical and spherical hollows. (December 2017)

• Record Type: Journal Article
• Authors: Minakov, A.V.; Guzei, D.V.; Meshkov, K.N.; Popov, I.A.; Shchelchkov, A.V.
• Is Part Of: International journal of heat and mass transfer. Volume 115(2017)Part A
• Page Start: 915
• Page End: 925
• Publication Date: 2017-12
• Subjects: Nanofluids -- Turbulent heat transfer -- Forced convection -- Thermal conductivity -- Viscosity -- Pressure drop -- Nanoparticle size -- Channels with wall heat transfer enhancers; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2017.07.117
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: The experiment investigation of turbulent convection of nanofluids in the rough pipes was carried out. The dependence of heat transfer coefficient from the concentration and nanoparticle size was studied. The dependence of pressure drop from the concentration and nanoparticle size was studied. The thermal-hydraulic efficiency of different rough pipes was analyzed. Abstract: Experimental study of forced turbulent convection of water-based nanofluids with nanoparticles of zirconium oxide (ZrO2 ) was carried out in smooth tubes and channels with wall heat transfer enhancers. Nanopowders with average particle size of 44 and 105 nm were used in the experiments. The Reynolds number ranged from 3000 to 8000. It is revealed that the increments in the heat transfer coefficient and the pressure drop when using nanofluids depend on the surface shape of the channel. It is shown that nanofluids allow reaching thermal-hydraulic efficiency comparable to that of the channels with artificial heat transfer enhancers.