Numerical Simulation of the Jet Impingement Cooling of a Circular Cylinder

Effect of nozzle shape on jet impingement heat transfer from a circular cylinder

“…In the previous studies of Singh et al [22,23] it was identified that the RNG keε model performs reasonably well compared to the other two equation models considered in their studies on circular jet impingement heat transfer from a circular cylinder. However, it is not known a priori which turbulence model performs better for the case of square and rectangular jets impinging on a circular cylinder.…”

“…Hence, in the keε model,n t f k 2 ε and in the keu model, n t f k u . Discussion on the use of various turbulence models are presented in Singh et al [22].…”

“…Further details of the same are provided in Singh et al [23] and Singh [24]. The average Nusselt number was calculated based on the local Nusselt number distribution as follows:…”

“…Electric supply was provided to the thin SS foil through copper connectors placed at the ends of the target cylinder. The details of heater construction can be found in Singh et al [23] and Singh [24]. The voltage drop (V) across the ends of the test cylinder was measured using a Fluke 115 Multimeter.…”

Conjugated heat transfer investigation with racetrack-shaped jet hole and double swirling chamber in rotating jet impingement

“…Liu et al [12] numerically studied the flow and heat transfer of a swirl chamber and found that the thermal performance factor enlarges with increases of Reynolds number, but decreases with increases of jet spacing. Li et al [13] illustrated the relationship of local Nusselt number and impingement target distance to nozzle diameter. Ligrani et al [14] studied the combination of impingement and cylinder array target surface and found that the Nusselt number ratios ranged from just above 1 to values as high as 2.25.…”