Numerical simulation of three-dimensional laminar multiple impinging square jets

Heat transfer of impinging jet array over concave-dimpled surface with applications to cooling of electronic chipsets

“…The adjustable high current DC electrical power is directly fed into the thin steel foil to generate the basically uniform heat flux surface. The temperatures of the heating surface under each test condition are imaged by the two-dimensional NEC TH3101-MR infrared radiometer (9). For this thermal image processing system, it takes about 0.3 s to complete the full-field of 239 · 255 matrix scan.…”

“…The heat transfer data over the dimple-roughened surface with a wide range of separation distances is also needed prior to the implementation of this jet-array impingement system for CPU cooling. In the past, the large amounts of experimental and theoretical studies investigate the impingement jet array heat transfer on the flat surface [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The flow structures of an impinging jet array are generally characterized into free jet region, stagnation flow region and wall-jet region.…”

“…The distribution of jet nozzles [4,5], interactions of wall-jet [6][7][8][9][10], cross-flow [11][12][13], exit condition of spent flow [14,15], drainage [16] and jet-array pulsation [17] play the major roles to affect the jet-array impingement heat transfer. For the staggered and in-line jet arrays, the networks along which the radial spent fluid is convected generate the hexagonal and square webs on the impinging surface due to the jet-to-jet interaction after the impingement [8,9]. A ring of secondary stagnation-heattransfer contour surrounds the central confined jet region when jet Reynolds number and separation distance are respectively large and small [8].…”

A Study on Turbulent Flow and Heat Transfer of an Off-set Jet

“…They concluded that the agreement between the temperature profiles predicted from both the low Reynolds number    model and the Reynolds stress turbulence model are better than that obtained from the standard    model. Aldabbagh and Sezai [13] have investigated numerically the steady state flow and heat transfer characteristics of impinging laminar square twin jets. The simulations have been carried out for various jet-to-jet spacing and nozzle exit-to-plate distances.…”

Numerical Investigation on the Fluid Flow Characteristics of a Laminar Slot Jet on Solid Block Mounted on a Horizontal Surface

“…It is reported that the increase in the aspect ratio will reduce the heat transfer rate and an increase in the Reynolds number will increase the heat transfer coefficient also. Aldabbaggh and Sezai [9] numerically simulated three-dimensional laminar multiple impinging jets. It is found that the size and the location of the vortex depends on the jet to plate distance.…”