Impingement Cooling of an Isothermally Heated Surface With a Confined Slot Jet

Numerical modeling of slot-jet impingement cooling of a constant heat flux surface confined by a parallel wall

“…They reported that the critical value of Re (based on jet width and velocity) for transition to turbulence for impinging slot-jet is about 2000. Other researchers [8,13,14] have used similar range of Re for laminar flow analysis of impinging jets. At each Reynolds number, the Richardson number is varied from 0 to 10, thus encompassing a wide range including purely forced convection case (Ri = 0) to dominating buoyant convection case.…”

“…The computations are done for 3 different jet exit Reynolds numbers (100, 300, and 500), which is defined in terms of the hydraulic diameter and uniform exit velocity of the jet. The upper limit of 500 for Convergence of average Nusselt number with grid refinement and comparison of the computed stagnation line Nusselt number, Nu s , between the present study and those of Chou and Hung[8].…”

“…Their results also showed the relative importance of buoyancy on the flow structure, the streamwise variation of the flow energy and the surface transport characteristics for the case of two-dimensional laminar impinging jets. Chou and Hung [8] performed numerical calculations to explore the effects of jet Reynolds number, ratio of separation distance to jet width, and jet exit velocity profile on stagnation line boundary layer thickness and local heat transfer characteristics on the isothermal heated surface in confined slot-jet impingement problems without including the buoyancy effects. They proposed new Nusselt number correlations for predicting stagnation line boundary layer thickness and local heat transfer characteristics.…”

Oscillation and heat transfer in upward laminar impinging jet flows

“…jet to separate from the impingement surface and moves the local fluid in the upward direction. Chuo and Hung (1994) studied similar slot jets, by examining effects of the Reynolds number, the impingement surface distance from the inlet, and the inlet velocity profile, on the heat transfer rate. Sahoo and Sharif (2004) studied upward and downward impinging jets, both, and presented the velocity and the temperature fields.…”

Numerical study of transient conjugate heat transfer of a turbulent impinging jet

“…Martin [1] presented extensively to the literature on submerged jet impingement and its heat transfer characteristics by compiling experimental data. Chou and Hung [2] conducted an analytical study for cooling of an isothermal heated surface with a confined slot jet. Chou and Hung [3] performed a numerical study for the fluid flow and heat transfer of slot jet impingement with an extended nozzle.…”