Effect of Channel-Confinement and Rotation on the Two-Dimensional Laminar Flow and Heat Transfer across a Cylinder

Poiseuille flow across an eccentrically confined stationary/rotating cylinder

“…7(a-e) shows the criss-cross motion of the shed-vortices, for eccentrically channel-confined flow across a stationary/rotating cylinder. This was proposed for stationary square cylinder by Suzuki et al (1993) and reported recently for rotating cylinder confined centrally in a channel by Prasad et al (2011). For stationary as well as rotating cylinder, the figure shows that the downstream distance at which the trajectory of positive and negative vortices cross each other increases with increasing eccentricity-ratio.…”

“…They further showed that the VS suppressed at higher Reynolds number ðRe Z Re c Þ. A more detailed study was reported, recently by Prasad et al (2011), at various rotationalvelocity ð0 r αr2Þ, blockage-ratio ð0% rβ r 50%Þ and Reynolds number ð35 r Re r170Þ. They found that the critical Reynolds number for the onset of VS increases, with increasing blockage ratio and increasing rotational velocity for stationary/rotating cylinder in a channel.…”

“…A detailed validation of the in-house code was done in the earlier work (Prasad et al, 2011), for flow across a centrally confined stationary/rotating cylinder in a channel. Here, the same code is further validated against the results of Zovatto and Pedrizzeti (2001) for eccentrically confined stationary cylinder, at an eccentricity-ratio of 62.5%.…”

“…There are numerous studies on a centrally/symmetrically channel-confined flow across a stationary (Chen et al, 1995;Sahin and Owens, 2004;Chakraborty et al, 2004;Khan et al, 2004;Rehimi et al, 2008;Singha and Sinhamahapatra, 2010) and for unconfined flow across a rotating (Tang and Ingham, 1991;Kang and Choi, 1999;Mittal and Kumar, 2003;Sengupta et al, 2003;Stojkovic et al, 2003;Lam, 2009;Paramane and Sharma, 2009) (Prasad et al, 2011) and the unconfined (Paramane and Sharma, 2009) flows in the recent work from our research group. The critical Reynolds number (based on the mean inlet velocity facing the cylinder u cyl ), for the onset of VS, is found to increase with increasing blockage ratio for channel-confined flow across a stationary cylinder.…”

“…There are a few work on the eccentrically channel-confined flow across stationary (Zovatto and Pedrizzeti, 2001;Mettu et al, 2006) and centrally channel-confined flow across a rotating (Prasad et al, 2011) cylinder. Eccentrically channel-confined flow across a stationary cylinder was studied by Zovatto and Pedrizzeti (2001) for 0 rγ r87:5% and 40 rRe r 200 at a constant β ¼ 20%.…”