Abstract:
Experimental measurements were made of the flow field surrounding both stationary and
rotating cylinder at various Reynolds numbers depending on the velocity changes. The
investigation concentrated on the distribution of turbulence of fluid flow and velocity at
different distances behind the rotating cylinder. The following results were reached after
comparing with the theoretical model using numerical simulations to investigate fluctuations
in the flow field: The velocity mutation position below the wake region moves upward as the
cylinder rotates counterclockwise, but the position above stays the same due to an increase in
relative speed (at the same Reynolds number). Furthermore, the velocity mutation position
beneath the wake region shifts somewhat downward with increasing Reynolds numbers. Based
on numerical simulations, lift force is affected by a substantial upward movement of the bottom
vortex position behind the cylinder following the rotational speed. Changes in the lower vortex
position have an impact on the wake region's free shear layer and lift force, especially at high
Reynolds numbers.
