Supplemental material PhD thesis
Chapter 14 -- Flow reversals in thermally driven flow
Movie 14.1: PIV flow visualization for Ra=3.8x108, Pr=5.7 The coarse-grained PIV movie starts at 10 eddy-turnover time before point 'e' and ends at point 'g' (in Fig. 12.1) with 35 times real speed.
(a) |
(b) |
(c) |
(d) |
Movie 14.2: Visualisation of 2D simulations. The color code gives the temperatures, arrows the velocities.
(a) Ra=1.0x108 , Pr=4.3
(b) Ra=1.0x108 , Pr=0.7
(c) Ra=1.0x108 , Pr=50
(d) Ra=1.0x1010, Pr=4.3
While (a) shows flow reversals due to the build-up of the cornerflows, this buildup is suppressed in (b) and (d). For large Pr, i.e. simulation (c), the flow is plume-dominated. These movies are rendered with a lower resolution for the website.