FLOW AROUND A CYLINDER - istiarto

– 5.26 –
� Downstream of the cylinder, in the plane � = 180°, a similar observation as in the
plane � = 90° can be observed. The agreement between the computed and measured
vorticities is only shown by the negative fields along the bottom. Above the bed,
z > 1 [cm], there is almost nothing can be observed. Some scattered positive
vorticities shown by the measured values are certainly due to the velocitiy data
irregularities as can be seen in the vector plot (see Fig. 5.11).
Fig. 5.13 Computed and measured vorticity fields, � � , in the planes � = 0°, 90°, 180°.
The shaded area indicates regions of negative vorticity fields.
Flow around a cylinder on a flat channel bed.