Turbulent structures in the flow field of plane jet impinging on a circular cylinder

A DPIV study on the effects of separation distance upon the vortical behaviour of jet–cylinder impingements

“…Cornaro et al (1999) found that a cylinder-jet diameter ratio as low as approximately 2.5 could produce relatively stable and well-formed vortex structures along the impingement surfaces, though it has to be highlighted that their jet Reynolds number was quite a bit higher at Re = 6000. Note also that Shim et al (2014) and Singh et al (2013) demonstrated that a wake region exists behind the circular cylinder during jet impingement. Therefore, using cylinder-jet diameter ratio of D/d = 2 will allow the present study to focus upon both the resultant vortex structures and their behaviour, as well as on the wake region at the cylinder lee side.…”

“…More recently, Shim et al (2014) conducted an experimental study upon the flow characteristics of plane jetcylinder impingement with different cylinder-jet diameter ratio of 0.5 and 1 using DPIV technique and proper orthogonal decomposition (POD) analysis. Their results showed that different flow structures around the cylinder are generated with different cylinder-jet diameter ratios.…”

An experimental study of a turbulent jet impinging on a flat surface

“…Measurements were performed using PIV, flow visualization using fluorescent dye and infrared thermography by Kim and Giovannini [14] to study a turbulent axisymmetric air jet impinging on a square cylinder mounted on a flat plate, and turbulence statistics and flow's topology were investigated. Shim et al [15] carried out the velocity field measurements by using PIV and studied the structural characteristics of an impinging jet on a circular cylinder for two different nozzle height at the same jet Reynolds number. Electrodiffusion and particle image velocimetry (PIV) measurements were made to compare the flow dynamics and mass transfer by Meslem et al [16] in impinging circular jet issuing respectively from a convergent nozzle and a square-edged orifice nozzle with the same exit diameter at a low Reynolds number of 1360 based on nozzle diameter and exit bulk velocity.…”

PIV measurements on the passive control of flow past a circular cylinder

“…A circular cylinder generally represents behaviour of wakes behind bluff bodies and it has also a very simple geometry, therefore flow past a cylinder has been a research topic in the literature [1][2][3][4]. Still, flow past a cylinder can be treated as a challenging problem in fluid mechanics science.…”