In this paper, we present a numerical investigation of a laminar isothermal plane two
dimensional wall jets. Special attention has been paid to the effect of the inlet conditions at the
nozzle exit on the flow thermal characteristics in forced convection regime. Two velocities profiles
at the nozzle exit are used: uniform profile and parabolic profile. The system of equations
governing the studied configuration is solved with a finite difference scheme and an implicit
scheme, for numerical stability we use a staggered non uniform grid. The obtained results show,
first, that the inlet conditions affect the flow in the immediate neighbourhood of the nozzle (core
region) in which the flow is governed mainly by the inertias forces. At the established region the
results become independent of the flow inlet conditions.
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