Modeling of Convective Cooling of a Rotating Disk by Partially Confined Liquid Jet Impingement

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.