Fluid flow and heat transfer with two cylinders in cross flow

Two circular cylinders in cross-flow: A review

“…These measurements are acquired for different arrangements of the cylinders, as the pitch ratio(s), incidence angle and -Aode et al (1985) 100, 300, 1 Â 10 3 1.5-10 30 2 Not given Towing tank FV, CTA St Igarashi (1981) 8.7 Â 10 3 -5.2 Â 10 4 1-5 4 6 0.6 Wind tunnel FV, CTA, pressure St, C P , C P 0 , C D Igarashi (1984) 1.15 Â 10 4 -1.03 Â 10 5 1-1.5 3 13 0.6 Wind tunnel FV, CTA, pressure St, C P , C P 0 , C D Ishigai et al (1972Ishigai et al ( , 1973 1.5 Â 10 3 -1.5 Â 10 4 1-5 11 9 Not given Wind tunnel FV, CTA, pressure St, C P Jendrzejcyk and Chen (1986) 1.5 Â 10 4 -1.5 Â 10 5 1.4-10 12 9 1-11 Water tunnel Force St, C D 0 , C L 0 Kiya et al (1992) 2 Â 10 4 -3.7 Â 10 4 2.5-4 11 10 0.1-10 Wind tunnel CTA, pressure - Kostic and Oka (1972) 1.3 Â 10 4 -4 Â 10 4 1.6-9 5 20 2.8 Wind tunnel Pressure, temperature C P , C D , Nu Kwon et al (1996) 1.7 Â 10 4 1-5 11 2 2.5 Water channel PIV Velocity field Lee and Basu (1997) 2.4 Â 10 4 -5. Nishimura et al (1986) 800-1 Â 10 4 1.2-7.2 5 9 0.6 Water tunnel FV Sh Okajima (1979) 4 Â 10 4 -6.2 Â 10 5 1.…”

Numerical investigation of convective heat transfer in unsteady flow past two cylinders in tandem arrangements

“…Both the flow field and force coefficients depend highly on the configuration and the spacing of the cylinder pair due to both wake and proximity-induced interference effects. Some of the earliest experimental studies on cylinder pairs in a tandem orientation that were carried out by Kostic and Oka (1972), Tanida et al (1973) and King and Johns (1976) demonstrated the presence of two major flow regimes with a complex transition region between them. For closely spaced cylinders, the flow separates behind the first cylinder and reattaches to the second one while, for larger spacing, vortex shedding occurs behind both cylinders.…”

Effect of Winglet Shape on Heat Transfer from Heated Cylinder in Cross Flow

“…It should be noted that no study was found, to the best knowledge of the authors, which aimed to investigate fluid flow and heat transfer over a cylinder by using winglets. The local heat flux in the front region of the cylinder (up to 50 o ) is relatively high, after this point the local heat flux decreases until the separation point (minimum Nusselt number) then heat transfer will be approximately constant and nearly equal to that at separation point [1] . This work will concentrate on altering wake region so as to seek for possibilities for enhancing heat transfer from cylinder.…”

“…Investigation of flow and heat transfer over a cylinder in cross flow is very important due to its wide use in engineering practices and to insufficiently investigated effects of particular geometrical parameters on the flow processe [1] . The flow over cylinder is a complicated flow with a large number of parameters involved [2] .…”