Multiple Flow Patterns and Heat Transfer in Confined Jet Impingement

Abstract

The flow field of a 2-D laminar confined impinging slot jet is investigated. Numerical results indicate that there exist two different solutions in some range of geometric and flow parameters. The two steady flow patterns are obtained under identical boundary conditions but only with different initial flow fields. Three different exit boundary conditions are investigated to eliminate artificial effects. The different flow patterns are observed to significantly affect the heat transfer. A flow visualization experiment is carried out to verify the computational results and both flow patterns are observed. The bifurcation mechanism is interpreted and discussed.

Analysis of the heat transfer of an impinging laminar flame jet

“…A lot of work is documented on flow behaviour and heat transfer of jets. Li et al [1] showed that there exist two different solutions for the flow field in some range of geometric and flow parameters. The use of multiple jets results in a wider range in heat transfer rates and distributions.…”

Numerical study of mixed convection on jet impingement cooling in a horizontal porous layer-using Brinkman-extended Darcy model

“…They highlighted the importance of Brinkman equation in convection of porous media. Although the literatures show that the jet impingement through non-porous fluid has been studied extensively (see, for example, [15][16][17][18][19][20]), it is noticeable that the jet impingement cooling through porous medium has received relatively less attention. The earlier studies in jet impingement are performed by Martin [15] and Jambunathan et al [16] using direct air impingement onto a solid surface.…”

Jet impingement cooling of a horizontal surface in a confined porous medium: Mixed convection regime

“…They consider the cooling of the heated horizontal surface by parallel flow with the heat source also. Although the literature shows that the jet impingement through pure (non-porous) fluid has been studied extensively (see, for example [15][16][17]), but it is noticeable that the jet impingement cooling through porous medium has received relatively less attention. Prakash et al [18] and Fu and Huang [19] have considered the impinging jet studies in enclosures with and without a porous layer.…”