In this study, we performed a computational fluid dynamics (CFD) modeling of tetracycline photocatalytic degradation using rGO/ZnO/Cu as the photocatalyst. The photoreactor was an unbaffled dished bottom tank with a backswept impeller and four lamp tubes. The CFD equations were solved for light intensity, velocity, pressure, and concentration fields in time-dependent modes of the fluid regime. Our model was more complex than the previous studies in several ways: we modeled the system is 3D instead of 2D, allowed variation of light intensity and pressure throughout the photoreactor, and traced the change of key parameters over time during the initiation phase until the steady state was reached. The flow pattern was solved and visualized in the presence of mixer in vertical and horizontal cuts. Experimentally measured concentrations over time matched model predictions well but also indicated the need for yet more complex models incorporating more factors that affect reaction rates.

在这项研究中，我们使用 rGO/ZnO/Cu 作为光催化剂对四环素光催化降解进行了计算流体动力学 (CFD) 建模。光反应器是一个带有后掠叶轮和四个灯管的无挡板碟形底槽。CFD 方程在流体状态的时间相关模式下求解光强度、速度、压力和浓度场。我们的模型在几个方面比以前的研究更复杂：我们对系统进行建模是 3D 而不是 2D，允许整个光反应器的光强度和压力发生变化，并在起始阶段追踪关键参数随时间的变化，直到稳定状态达到。在垂直和水平切割中存在混合器的情况下，流动模式被求解和可视化。