Numerical Study of Laminar Confined Impinging Slot Jets with Nanofluids

Abstract

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 Al 2 O 3 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.

Cooling Heat Transfer Analysis using Multiple Inline Inclined Air Jet Impingement

“…Different fluids are used to carry heat from hot surface. De-ionized water [12] confined air and water jets [13] mist jet impingement cooling using air-liquid mist [14] [15] fluids with nanoparticles (mixture of water and Al 2 O 3 nanoparticles) [16] electrically charged micro droplets can fully exploit the droplet cooling capacity [17]. Fluid used by jet is also one important choice constraint for jet, for financial considerations, the method of jet production can also consider as the considerable factors.…”

Elektronik Bileşenlerin Bir Çift Slot Jet ile Soğutulmasında Nozül Konumunun Soğutma Performansına Etkisi

“…Lorenzo vd. [20] sabit sıcaklıktaki düz bir plakanın nanoakışkan ile soğutulmasında nanopartikül hacim oranının taşınımla ısı transferine etkilerini sayısal olarak incelemişlerdir. Afroz ve Sharif [21] sabit sıcaklıktaki bir yüzeyin slot jet ile soğutulmasını farklı jet-hedef plaka mesafeleri ve Reynolds sayılarında sayısal olarak analiz etmişlerdir.…”

Numerical study of hydrodynamic and thermal behavior of Al2O3/Water nanofluid and Al2O3-Cu/Water hybrid nanofluid in a confined impinging slot jet using two-phase mixed model

“…Research studies in different fields have always focused on identifying new methods for improving heat transfer, applying two main approaches to this purpose: active and passive. Among; the active techniques, impinging jets have found wide applications since they offer high localized heat transfer coefficients (HTC); their applications include drying of textiles, film, and paper, temperature controlling of gas turbine components and combustors' outer wall, freezing of tissue in cryosurgery and manufacturing, material processing, and electronic cooling [1]. Many; recent research studies are interested in conducting numerical and experimental research on heat and mass transfer in impinging slot jets to investigate the various dimensions of this issue.…”