Open AccessNumerical Study of Laminar Confined Impinging Slot Jets with Nanofluids
Author(s) -
Giuseppe Di Lorenzo,
Oronzio Manca,
Sergio Nardini,
Daniele Ricci
Publication year - 2012
Publication title -
advances in mechanical engineering/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 - 10.1155/2012/248795
Subject(s) - laminar flow , nusselt number , nanofluid , mechanics , reynolds number , heat transfer , jet (fluid) , materials science , thermodynamics , heat transfer coefficient , physics , turbulence
A solution to obtain efficient cooling systems is represented by the use of confined or unconfined impinging jets. Moreover, the possibility of improving the thermal performances of the working fluids can be taken into account and the introduction of nanoparticles in a base fluid can be considered. In this paper, a numerical investigation on confined impinging slot jet working with a mixture of water and Al2O3 nanoparticles is described. The flow is laminar and a uniform temperature is applied on the target surface. The single-phase model approach has been adopted. Different geometric ratios, particle volume concentrations, and Reynolds numbers have been considered in order to study the behaviour of the system in terms of average and local Nusselt number, convective heat transfer coefficient and required pumping power profiles, temperature fields, and stream function contours