  In this work, experimental and numerical investigations are considered for
confined buoyant turbulent jet with varying inlet temperatures. Results of the
experimental work and numerical simulations for the problem under consideration
are presented. Four cases of different variable inlet temperatures and
different flow rates are considered. The realizable k-epsilon turbulence model
is used to model the turbulent flow. Comparisons show good agreements between
simulated and measured results. The results indicate that temperatures along
the vertical axis vary, generally, in nonlinear fashion as opposed to the
approximately linear variation that was observed for the constant inlet
temperature that was done in a previous work. Furthermore, thermal
stratification exits particularly closer to the entrance region. Further away
from the entrance region the variation in temperatures becomes relatively
smaller. The stratification is observed since the start of the experiment and
continues during whole time. Numerical experiments for constant, monotone
increasing and monotone decreasing of inlet temperature are done to show its
effect on the buoyancy force in terms of Richardson number
