In this paper a numerical investigation is carried out on confined impinging slot-jets with nanofluids on a horizontal heated surface at uniform temperature. The cooling fluid is a Al2O3/water based nanofluid and thermo-physical properties are assumed to be constant with temperature. The single-phase model is employed to describe the behaviour of nanofluid and the flow regime is laminar. Different values of the channel height, nanoparticle volume concentration and diameter are investigated. Results show the increase of Nusselt number together with pumping power. Moreover, significant increases in terms of convective heat transfer coefficients and Nusselt number are detected also for decreasing values of particle diameter. © 2012 Praise Worthy Prize S.r.l. All rights reserved.
Laminar confined impinging slot jets with nanofluids on isothermal surfaces
Di Lorenzo, Giuseppe;
2012-01-01
Abstract
In this paper a numerical investigation is carried out on confined impinging slot-jets with nanofluids on a horizontal heated surface at uniform temperature. The cooling fluid is a Al2O3/water based nanofluid and thermo-physical properties are assumed to be constant with temperature. The single-phase model is employed to describe the behaviour of nanofluid and the flow regime is laminar. Different values of the channel height, nanoparticle volume concentration and diameter are investigated. Results show the increase of Nusselt number together with pumping power. Moreover, significant increases in terms of convective heat transfer coefficients and Nusselt number are detected also for decreasing values of particle diameter. © 2012 Praise Worthy Prize S.r.l. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
