vortex shedding


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Related to vortex shedding: Strouhal number

vortex shedding

n
(General Physics) the process by which vortices formed continuously by the aerodynamic conditions associated with a solid body in a gas or air stream are carried downstream by the flow in the form of a vortex street
References in periodicals archive ?
Honorable Mention, Postdocs & Grad Students: Maria Aleman, a graduate student in the College of Engineering, for "Transverse Oscillating Cylinder Vortex Shedding."
Control of vortex shedding downstream of circular cylinders has a great importance and several control methods are used to suppress the pattern effect of vortex shedding.
Also, high fidelity models take into account Reynolds number effects and lift and drag fluctuations (10% to 20%) caused by vortex shedding [11, 12] in the case of flow separation around debris.
[19] reported on the use of the lattice Boltzmann method, in conjunction with large-eddy simulations, to study an interesting phenomenon related to the suppression of vortex shedding from circular cylinders with high accuracy coupled with computational efficiency.
In the movement of these vehicles, the interaction between the air and the cylinder is extremely complex, which involves the nonlinear process of flow separation, vortex shedding, lift oscillation, and so on.
[8] numerically predicted the effect of aiding thermal buoyancy over a square cylinder at low Reynolds number; the governing equations are solved in unsteady state, the range of Reynolds number is chosen between 5 and 40, the reported results presented that fluid flow becomes unstable when thermal buoyancy is increased, at some critical parameter of Richardson number, periodic vortex shedding is observed.
Characteristic dimensionless frequencies, approximately 0.2 are captured in the wake which are close to the Strouhal number of the measured vortex shedding for a two-dimensional cylinder and larger than that for finite length circular cylinder [22].
where [[theta].sub.w] is the water density, D is the outer diameter of the cable, [[omega].sub.v] is the vortex shedding frequency, [C.sub.L] is the vortex-induced lift coefficient, and [v.sub.L] is the vortex flow velocity and its typical value is taken as 1.0 m/s.
It is observed that the vortex shedding takes place for the lateral particles when t/T [greater than or equal to] 20.
Vortex-induced vibration (VIV) is a resonant phenomenon caused by periodic airflow vortex shedding whose frequencies are close to the natural frequency of the structures [1].
It is through the automatic technology to disturb the flow filed, which can control the cylinder vortex shedding and finally achieve the purpose of vibration suppression.