Configuration of a rotating cylinder with a spanwise disk in air crossflow, computational geometry and the grid on a z-slice located at the symmetry wall (left), and an enlarged image near the wake region with a grid on the cylinder, disk and a z-slice located at the symmetry wall (right).

Contexts in source publication

Context 1

... experimental setup of a rotating cylinder with a spanwise disk in air crossflow was reproduced numerically with several geo- metrical approximations to reduce the geometrical complexity and required computational cost. Fig. 2(left) shows the 1.2-million- point mesh of the test section, which was generated using the soft- ware GAMBIT based on block-structured grids. The computational domain had a length of 36.8D c that extended from 15.3D c upstream of the cylinder to 21.5D c downstream of the cylinder. The trans- verse direction had a height of 15.4D c , ...

Context 2

... near the disk. It will be shown in Section 7 that near the disk, the vortical structures gen- erated from the edge of the spanwise disk are smaller in size than the cylinder radius, R c . Moreover, movements of these vortical structures in the streamwise and vertical directions are dominant compared with movements in the spanwise direction. Fig. 2(right) shows the structure of the generated mesh, where there are 120 points around the circumferences of the cylinder and the disk, and 47 points in the spanwise direction. In the radial direction, the grid is compressed near the surfaces of the cylinder, where the stretching ratio between the heights of the inner grids to the ...

Context 3

... Fig. 12, thermal plumes created around the rotating cylinder and the disk provide a qualitative picture of the three-dimensional temperature field and the underlying vortical structures. The instantaneous iso-surface of T = 343°K, which was cooler than the disk temperature, was coloured by the contour plot of the velocity magnitude, thus ...