Laminar forced convection heat transfer around two rotating side-by-side circular cylinder

Non-Newtonian power-law flow and heat transfer across a pair of side-by-side circular cylinders

“…Similarly, the drag values for the upper cylinder differ by about 2.7% for T/D = 1.5 and about 2.6% for T/D = 4.0 (Table 5). Whence, the heat transfer results are compared for T/D = 2.5 and T/D = 4.0 at Re = 100 and Pr = 0.7 for n = 1, the values of the average Nusselt number are found to differ about 1.5% and 1.0%, respectively (Table 6) with the values reported by Yoon et al [17].…”

“…The validation of the current framework is done by comparing with the results of Ding et al [9] and Yoon et al [17] as presented in Tables 5 and 6. The unsteady fluid flow studies conducted at Re = 100 for T/D values of 1.5 and 4.0 reveal that the present drag values compared for the lower cylinder differ by about 3.0% for T = 1.5D and about 2.6% for T = 4.0D (Table 5).…”

“…Han et al [16] numerically studied the heat transfer from two nearby isothermal circular cylinders of equal diameter immersed in a uniform cross-flow for Re = 120 at Pr = 0.7 and reported that significant changes in the characteristics of heat transfer are noticed depending on how they are positioned, resulting in quantitative changes in heat transfer coefficients of both cylinders. Yoon et al [17] numerically investigated the 2-D laminar forced convection heat transfer past two rotating circular cylinders in a side-by-side arrangement at various rotational speeds for four different gap spacings of 3, 1.5, 0.7 and 0.2 at a constant Reynolds number of 100 and a Prandtl number of 0.7 (air).…”

A numerical method applied to forced and natural convection flows over arbitrary geometry

“…Since the flow is unsteady, the computations were advanced in time until the drag, lift, and heat transfer coefficients reached a statistically steady state. The instantaneous temperature contours are shown in Fig. 14 for different rotational speeds in comparison with the results of Yoon et al [28]. The unsteady effects of the interactions of upper and lower flows driven by rotating surfaces as well as the different The heat-transfer-property-related parameters, i.e., the timeand surface-averaged Nu number, were derived for comparison, as given in Table 4.…”

Convective heat transfer enhancement in a parallel plate channel by means of rotating or oscillating blade in the angular direction

“…A significant rise was observed when the cylinder frequency was in lock-in region. Yoon et al [14] numerically investigated heat transfer from two rotating circular cylinders at Re=100 and found that, by increasing the rotational speed, time and surface-averaged Nusselt number was decreased for all the gaps between the cylinders.…”