Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 195-224 |
| Number of pages | 30 |
| Journal | Journal of Fluid Mechanics |
| Volume | 566 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2006 |
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Three-dimensional transition of a water flow around a heated cylinder at Re=85 and Ri =1.0. / Ren, M.; Rindt, C.C.M.; Steenhoven, van, A.A.
In: Journal of Fluid Mechanics, Vol. 566, No. 1, 2006, p. 195-224.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Three-dimensional transition of a water flow around a heated cylinder at Re=85 and Ri =1.0
AU - Ren, M.
AU - Rindt, C.C.M.
AU - Steenhoven, van, A.A.
PY - 2006
Y1 - 2006
N2 - The three-dimensional flow transition behind a heated cylinder subjected to a horizontal flow (water is used as the working fluid; Pr=7) at a Reynolds number Re=85 and a Richardson number Ri=1.0, manifests itself in the far-wake as escaping mushroom-type structures from the upper vortices. The origin of the escaping mushroom-type structures lies in the generation of streamwise vorticity in the near-wake, which is described as a cyclic-process. In the presence of a spanwise temperature gradient in the near-wake, streamwise vorticity is generated, which results from baroclinic vorticity production. Due to these streamwise vorticity regions, low-speed flow will move upwards at so-called in-plume positions resulting in high- and low-speed streaks in the upper half of the wake. Next, `transverse' vorticity is generated by the spanwise gradients in the streamwise velocity component, resulting in counter-rotating vortices directly behind the cylinder. These vortices lead to high- and low-temperature regions in spanwise direction and the process repeats itself.
AB - The three-dimensional flow transition behind a heated cylinder subjected to a horizontal flow (water is used as the working fluid; Pr=7) at a Reynolds number Re=85 and a Richardson number Ri=1.0, manifests itself in the far-wake as escaping mushroom-type structures from the upper vortices. The origin of the escaping mushroom-type structures lies in the generation of streamwise vorticity in the near-wake, which is described as a cyclic-process. In the presence of a spanwise temperature gradient in the near-wake, streamwise vorticity is generated, which results from baroclinic vorticity production. Due to these streamwise vorticity regions, low-speed flow will move upwards at so-called in-plume positions resulting in high- and low-speed streaks in the upper half of the wake. Next, `transverse' vorticity is generated by the spanwise gradients in the streamwise velocity component, resulting in counter-rotating vortices directly behind the cylinder. These vortices lead to high- and low-temperature regions in spanwise direction and the process repeats itself.
U2 - 10.1017/S0022112006001923
DO - 10.1017/S0022112006001923
M3 - Article
VL - 566
SP - 195
EP - 224
JO - Journal of Fluid Mechanics
JF - Journal of Fluid Mechanics
SN - 0022-1120
IS - 1
ER -