Abstract: Numerical simulation with the standard k -ε model was performed to study single-phase convective heat transfer at the impinging zone of non-immersed slot jet. The factors considered were jet velocity, spacing of nozzle-to-impinging plate (height), slot width, angle between jet direction and plate, temperatures of impinged plate and water (liquid) from the slot nozzle. The results show that jet velocity is the most remarkable factor influencing heat transfer at the impinging zone, and other factors such as water temperature and slot width are also non-negligible. The angle between jet direction and impinging plate only influences the distribution of local convective heat transfer coefficient.