Numerical investigation of inclined fluidic oscillator in microchannel heat exchanger

The primary aim of this research was to investigate the enhancement of momentum and thermal energy transfer in a microchannel heat exchanger through the use of fluidic oscillators. To this end, a sweeping jet impingement heat transfer performance was evaluated with varying impact angles, distances between fluidic oscillators, and Re numbers. This study employed two fluidic oscillators to investigate heat transfer in a microchannel heat exchanger. To enhance the effectiveness of heat transmission in jet cooling, the fluid was oscillated. This allowed it to be calculated how much the flow rate and, consequently, the local Nu value increased, increasing the heat transfer performance. The study was based on the work of Wu Y. et al. validation studies were carried out on the study from the base study and model is validated for 3 Re numbers. Following the validation research, angles of 30, 45, and 60 degrees were evaluated between the fluid oscillator and the channel. Additionally, the distance between the two oscillators was investigated at distances of 7D, 7.5D, and 8D from the center of the outlet hole. A steady heat flux was applied to the channel surface, which served as the impact surface in the model. The fluid's Reynolds range was identified as 3000 to 10000. The study's findings revealed that increasing the oscillation of the jet flow process improves heat transfer efficiency. Additionally, it was found that when the impact angle grew, the pressure drop and Nu number likewise increased, with a 12 percent improvement in heat transfer being the largest. The heat transmission is found to be positively impacted by shortening the space between the strings, with a maximum improvement of 5.7 percent.