Effects of Inlet and Outlet Ports of Ventilated Square Cavity on Flow and Heat Transfer

Abstract

This paper deals with numerical simulations of forced convection from a pair of identical cylinders arranged in tandem manner inside a square cavity of single inlet and outlet ports. The gap distance between the cylinders is fixed with half of square length. The main purpose of this study is to see the effect of inlet and outlet port positions on fluid flow and heat transfer rate. The governing equations of continuity, momentum and energy have been solved using finite-volume method in laminar, steady and two dimensional directions. The work has been done in the range of these conditions: Re = 1 to 40, at fixed Pr = 7.01. Three positions of inlet and outlet port have been selected. The mean results of flow patterns and distribution temperature are illustrated under the contours of streamline and isotherm respectively. The drag and lift coefficients of each cylinder is computed and discussed. The average Nusselt number of both cylinders is also presented and discussed. It was found that the inlet and outlet ports have significant effects on heat transfer from the confined cylinders.

3D Forced Convection in a Box Containing Two Cylindrical Heat Sources

“…To see the effect of the size of the cavity on the flow field and the temperature field we vary the size of the cavity to three significant values: Ra = 2.54 x 10 7 , Ra = 5 x10 7 and Ra = 8.57 x10 7 . The Reynolds number is fixed at Re = 350.…”

“…In this section, we study the effect of the fan speed (Reynolds number) on box cooling. We holding the Rayleigh number fixed to Ra = 8.57×10 7 and vary the Reynolds number: Re = 2, 20, 100, 250, 350 and 500. On the Table 4, we give the Nusselt number as a function of Reynolds number.…”

“…To show the effect of heat transfer distribution between the cylindriacal heat source we make a study for three differents distiance between them. In Table 5, we have presented the Nusselt number as a function of the distance between the cylindrical sources denoted S (Ra = 8.57×10 7 , Re = 350). We notice that S increases the mean Nusselt number also increased.…”

“…The obtained results showed the augmentation in heat transfer rate with increasing the distance between cylinders (Helmaoui et al [6]). Laidoudi et al [7] exhibited the profound influence of inlet and outlet ports on the heat transfer from the circular cylinders. Koufi et al [8] also emphasized the effects of the openings in turbulent heat transfer via mixed convection inside vented enclosures.…”

Computational study of thermal buoyancy from two confined cylinders within a square enclosure wifth single inlet and outlet ports

“…These orifices have different widths. Moreover, there are other works on mixed convection in an enclosure under different situations 20‐26 …”