Von Kármán vortex
During this project, the fluid flow over cylinder was observed at different Reynolds number ranging from 5 to 3.5e6. The effect of Reynolds number was analysed to observe the behavior of von karman street over different flow regimes.
Visualization of Von Karman Effect
Von-Karman Effect
In fluid dynamics, Von karman effect is a common vortex effect in which there is a repeating pattern of swirling vortices which are caused by the process called vortex shedding. These vortices are responsible for unsteady fluid flow separation around blunt bodies.
Calculation of the Reynolds Number
$$ Density ~ of~ air (\rho ) = 1.225 ~ kg/m^3 $$ $$ \\ Kinematic ~ viscosity ~ of~ air (\mu) $$ $$ \\ = 1.4607^{-5} ~ m^2/s $$ $$ \\ Characteristic ~ length (L) $$ $$\\= Dia. ~ of ~ Cylinder $$ $$\\ = 200 ~ mm$$ $$ \\ Reynolds ~ Number (Re) = \frac{\rho \times V \times L}{\mu} $$ $$\\ \approx 16773 \times v$$ Here, The velocity used in the simulation was $$ 0.156 m/s $$ which results in the Reynolds number $$\approx 2617.$$