Using oscillations to enhance heat transfer for a circular cylinder

Lattice Boltzmann simulation of the convective heat transfer from a stream-wise oscillating circular cylinder

“…When Re increases to 800-8000, the results from Yang and Chen (2008) indicated that the heat transfer from heated blocks was enhanced as the oscillating frequency of the cylinder was in lock-in regimes. Moreover, a detailed experimental investigation into the effects of transverse oscillations on the heat transfer from a circular cylinder in cross-flow was carried out by Pottebaum and Gharib (2006), in which the dominant parameters are Re = 687, f o /f s = 0.061-1.08, A = 0-1.0d. They firstly concluded that the heat transfer enhancement in the lock-in regimes is limited to ratios less than 0.5 because of the shortening of the formation length in the wake at these conditions (Park and Gharib, 2001).…”

Heat transfer enhancement in a slot channel via a transversely oscillating adiabatic circular cylinder

“…Heat transfer from an oscillating cylinder has been investigated extensively [10][11][12][13]. However, studies relevant to channel heat transfer enhancement due to a transversely oscillating structure are rather rare.…”

Vortex shedding and heat transfer in rotationally oscillating cylinders

“…They looked at heat transfer from cylinders undergoing transverse oscillations in the range 2500 Re 15 000 and found no appreciable increase in the heat-transfer rate. Recently, Pottebaum (2003) and Pottebaum & Gharib (2006) showed that transversely forced cylinders in a cross-flow do exhibit significant heat-transfer enhancement under certain forcing conditions. They also explained the lack of heat-transfer enhancement seen by Sreenivasan & Ramachandran (1961) to be due to the low-frequency ratios studied.…”

“…They also explained the lack of heat-transfer enhancement seen by Sreenivasan & Ramachandran (1961) to be due to the low-frequency ratios studied. The study by Pottebaum & Gharib (2006) was done at Re = 687 and they showed that the heat transfer is significantly enhanced by small-amplitude oscillations at frequencies near the Strouhal frequency and its harmonics. Heat transfer from cylinders undergoing rotary oscillations has been studied recently by Mahfouz & Badr (2000b).…”