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This article presents the transient conjugate heat transfer characterization of a free liquid jet impinging on a rotating solid disk of finite thickness and radius. Calculations were done for a range of Reynolds number (500-1400), Ekman number (6.62 Â 10 25 -1), disk thicknesses to nozzle diameter ratio (0.17-1.67), and solid to fluid thermal conductivity ratio (36.91-697.56) using water as the coolant. It was detected that the duration of the transient increased with disk thickness and decreased with Reynolds number and thermal conductivity ratio. A correlation for average Nusselt number for the transient heat transfer is presented.

The aim of this computational study is to characterize convective heat transfer for a free liquid jet impinging on a rotating and uniformly heated solid disk of finite thickness and radius. Calculations are done for a number of disk materials and working fluids covering a range of Reynolds number (445-1,800), Ekman number (2.21 3 10 À5 -2.65 3 10 À4 ), nozzleto-target spacing (b ¼ 0.55-5.0), disk thicknesses-to-nozzle diameter ratio (0.167-1.67), disk-to-nozzle diameter ratio (2.11-6.33), Prandtl number (1.29-124.44), and solidto-fluid thermal conductivity ratio (36.91-2222). A generalized correlation for average Nusselt number is developed from numerical results. The simulation results compare reasonably well with available experimental data.

This paper presents the results of the numerical simulation of conjugate heat transfer during a semiconfined liquid jet impingement on a uniformly heated spinning solid disk of finite thickness and radius. This study considered various disk materials, namely, aluminum, copper, silver, Constantan, and silicon; covering a range of Reynolds number (220–900), Ekman number (7.08×10−5–∞), nozzle-to-target spacing (β=0.25–1.0), disk thicknesses to nozzle diameter ratio (b∕dn=0.25–1.67), and Prandtl number (1.29–124.44) using ammonia (NH3), water (H2O), flouroinert (FC-77), and oil (MIL-7808) as working fluids. The solid to fluid thermal conductivity ratio was 36.91–2222. A higher thermal conductivity plate material maintained a more uniform interface temperature distribution. A higher Reynolds number increased the local heat transfer coefficient. The rotational rate also increased the local heat transfer coefficient under most conditions.