In this study, the transient numerical simulation of the flow in a fluidic oscillator has been performed. The proposed device includes several geometrical modifications of a previously patented apparatus intended for the synthesis of ozone-rich bubbles in an oxygen plasma. Prior to the experimental construction of the proposed fluidic oscillator, the present work performs a numerical study of the internal flow in the proposed design, aimed to determine its feasibility. The unsteady simulations are based on the unsteady Reynolds averaged Navier–Stokes equations coupled to the transition Shear Stress Transport (transition SST) turbulence model due to the low Reynolds numbers considered (3500 and 5000 based on flow bulk velocity). The behavior of the complex fluid flow inside the device, where four main vertical structures develop and interact, along one cycle is described in detail including the turbulent kinetic energy and intermittency in the analysis. Moreover, the effect of increasing the Reynolds number on the pressure oscillation frequency and amplitude is analyzed. In particular, the frequency is increased around a 38% and the amplitude a 100% when switching from a Reynolds number of 3500–5000. The numerical results obtained are encouraging, and the evaluated fluidic oscillator design will be fabricated and analyzed in an upcoming experimental study.

在这项研究中，已经完成了流体振荡器中流动的瞬态数值模拟。所提出的装置包括用于在氧等离子体中合成富含臭氧的气泡的先前获得专利的装置的若干几何修改。在提出的流体振荡器的实验构造之前，本工作对提出的设计中的内部流动进行了数值研究，旨在确定其可行性。非稳态模拟基于不稳定的雷诺平均Navier-Stokes方程，再加上考虑到的低雷诺数（基于流动体积速度的3500和5000），再加上过渡剪切应力迁移（过渡SST）湍流模型。设备内部复杂的流体流动行为，其中四个主要的垂直结构得以发展并相互作用，详细介绍了沿一个循环的过程，包括分析中的湍动能和间歇性。此外，分析了增加雷诺数对压力振荡频率和幅度的影响。特别是从3500–5000的雷诺数转换时，频率增加了38％，幅度增加了100％。获得的数值结果令人鼓舞，并且将在即将进行的实验研究中制造和分析评估的流体振荡器设计。从3500–5000的雷诺数转换时，频率增加38％，幅度增加100％。获得的数值结果令人鼓舞，并且将在即将进行的实验研究中制造和分析评估的流体振荡器设计。从3500–5000的雷诺数转换时，频率增加38％，幅度增加100％。获得的数值结果令人鼓舞，并且将在即将进行的实验研究中制造和分析评估的流体振荡器设计。