Slot-jet impingement systems are recognized in their ability to control fluid flow for high energy transfer
on the target surface. For an energy saving point of view, enhancement of the energy transfer with a pas-
sive technique would be precious considering high air velocity being exerted in such system. The objec-
tive of this investigation was to demonstrate that a modified slot-jet impingement system with
additional horizontal and vertical plates could enhance the overall heat transfer (Nu = Nusselt number)
over the target impinging surface. The demonstration involved published experimental data and compu-
tational fluid dynamics simulations in evaluation of various positions of the horizontal (s = horizontal
plate height) and vertical (L = distance from nozzle edge to vertical plate) plates. It was found that the
s value has a stronger effect on the heat (Nu) distribution profiles on the target surface than that of
the L value. The presence of the plates introduced more than one peak of Nu values. Only s = L = 0.5W
(W = slot width) offered an excellent enhancement of heat transfer over that of the control (no plates)
in the stagnation and wall-jet regions. Moreover, jet streamlines/recirculation and velocity vector on
the y-axis at y = 5.95W were well related to the surface Nu distribution profiles. It was demonstrated
that a proper design of the plate position significantly enhanced the overall energy transfer on the target
surface and improved the cooling rate of food model.