Fluid dynamics and mass transfer in curved reactors: A CFD study on Dean flow effects

Theoretical Hydrodynamic Modeling of the Fluidized Bed Photoreactor (FBP) Using Computational Fluid Dynamics (CFD): Fluidization Conditions for TiO2-CuO Immobilized on Beach Sand Granules

“…Table 3 presents a compilation of information relevant to the velocity profile obtained by CFD modeling for three tubular photoreactors reported in recent research. However, CFD modeling has been developed for other photocatalytic reactors, such as the raceway pond reactor [26], stirred tank [20], packing bed [27], compound parabolic collector [28,29], parallel-channel microreactor [16], curved channel [30], photo impinging streams cyclone [31], cross-flow [32], flat plate [33], baffled flat-plate [34], and static mixer [35], among others. In other work, Liu et al [36] have developed a CFD modeling in gas-liquid-solid minifluidized beds.…”

Optimization and Parameter Investigation of the Planar Photocatalytic Microreactor

“…The microreactor could treat large volumes of solution by a continuous injecting mode, the reaction of which is smooth and stable. Forms of mass transfer and fluid behavior in microreactors are important for photocatalysis. − Many parameters, including the size of microreactor, the flow speed, the light intensity, and reactant concentration, would affect the photocatalytic efficiency of microreactors. , Although many micro structures were introduced in microreactors to enhance the mass transfer, influences of these parameters are still short of investigation, leaving the improvement of photocatalytic efficiency lack of guidance. − Therefore, finding the effects of these parameters is quite significant for optimizing microreactors. , Furthermore, the preparation process of conventional microreactors is usually costly and slow. The requirement of in situ growth of photocatalysts in a microreactor impedes the application of efficient photocatalysts, which needs high temperature or strict condition in synthesis. − As a result, it is an urgent task for researchers to find a low-cost method for the microreactor preparation and make it applicable to most photocatalysts. , …”

Selective Scaling-out of a Serpentine Micromixer: Scaling Criteria

“…1,5,9 Among these, a serpentine micromixer (SMM) with a repeating microchannel is notable for its simple structure, ease of manufacture, and ability to scale up. 10,11 While passive micromixers, including SMMs, have faced challenges in scaling-up for large-scale industrial applications, there are examples where microreactors have successfully been implemented in large-scale production. For instance, microreactors have been employed in the pharmaceutical industry for continuous synthesis of active pharmaceutical ingredients (APIs), 12,13 achieving throughputs on the order of tens to hundreds of liters per hour.…”

“…Passive micromixers can induce chaotic advection by simply relying on their unique microchannel structures and without any external energy input . Various passive micromixers have been reported in the literature, such as T-type, Y-type, interdigital, zigzag, tesla, three-dimensional (3D) twisted, grooved/ribbed, and serpentine micromixers. ,, Among these, a serpentine micromixer (SMM) with a repeating microchannel is notable for its simple structure, ease of manufacture, and ability to scale up. , …”