ANALYSIS OF THERMAL ENHANCEMENT IN A BAFFLED RECTANGULAR CHANNEL WITH DIFFERENT FORMS OF OUTLET

Abstract

Analysis of the influence of different forms of channel outlet on the heat exchange hydro-thermal characteristics over a rectangular channel embedded with trapezoidal baffle has been made in this paper. Four different forms of the outlets, viz., (I) an outlet similar to the inlet (case-A), (II) two outlets in the upper and lower parts of the exit section (case-B and case-C) and (III) an outlet of length equal to 45% of the inlet (case-D) have been considered. The impact of the outlets has been investigated from the numerical standpoint using computational fluid dynamic software FLUENT, for a two-dimensional model. The results indicate that the thermal exchange rate substantially increases due to the presence of baffles and depends on the form of the outlet. Moreover, the present investigation shows that the position of the outlet and the mixing of nano-particles in the base fluid plays a significant role in the improvement of thermal exchange.