A Study on the Two-Dimensional Jet Impinging on a Circular Cylinder. 1st Report, Measurements of Flow-Field and Heat Transfer around a Circular Cylinder Mounted near Two Flat Plates.

Mathematical modeling of the heat transfer and flow field of liquid refrigerants in a hydrofluidization system with a stationary sphere

“…The position of the boundary layer separation from the surface was u s = 137.9 ± 2.6°( x AE SD). As mentioned before in Section 4.3, this value is in good agreement with the results found by Haneda et al (1994) and Pekdemir et al (1998) for cylinders. In addition, Pekdemir et al (1998) suggested that a possible Coanda effect (Faber, 1995) could be responsible for a decreasing or removing of the recirculation zone, leading to a delayed boundary layer separation compared to those obtained for a cylinder immersed in potential flows (u s < 90°) for the range of Re used in this study (Clift et al, 1978).…”

“…Finally, h c reaches a minimum near the boundary layer separation region and then an increment due to a second- ary flow behind the sphere surface is observed. The position of the minimum and the profile were similar to those found by Haneda et al (1994) for cylinders impinged by air jets. In addition, Pekdemir et al (1998), studying the mass transfer in cylinders impinged by an air jet in similar operative conditions, found that the position of the minimum were in the rear part of the cylinder.…”