Mixing Enhancement By Gravity-dependent Convection in a Y-shaped Continuous-flow Microreactor

Bratsun, Dmitry; Siraev, R. R.; Pismen, L. M.; Mosheva, Elena; Shmyrov, Andrey; Мизев, А. И.

doi:10.1007/s12217-022-09994-9

Cited by 5 publications

(2 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This process equalizes the concentrations of substances dissolved in the layers, contributing to the reduction of unstable density gradients and the intensity of convection. For a more in-depth understanding of the dynamics of double-diffusive instability in continuous-flow microchannels, refer to [25].…”

Section: Experiments In the Q ≠ 0 Casementioning

confidence: 99%

Applying the Shearlet-Based Complexity Measure for Analyzing Mass Transfer in Continuous-Flow Microchannels

Mosheva,

Krasnyakov

2024

FDMP

View full text Add to dashboard Cite

Continuous-flow microchannels are widely employed for synthesizing various materials, including nanoparticles, polymers, and metal-organic frameworks (MOFs), to name a few. Microsystem technology allows precise control over reaction parameters, resulting in purer, more uniform, and structurally stable products due to more effective mass transfer manipulation. However, continuous-flow synthesis processes may be accompanied by the emergence of spatial convective structures initiating convective flows. On the one hand, convection can accelerate reactions by intensifying mass transfer. On the other hand, it may lead to non-uniformity in the final product or defects, especially in MOF microcrystal synthesis. The ability to distinguish regions of convective and diffusive mass transfer may be the key to performing higher-quality reactions and obtaining purer products. In this study, we investigate, for the first time, the possibility of using the information complexity measure as a criterion for assessing the intensity of mass transfer in microchannels, considering both spatial and temporal non-uniformities of liquid's distributions resulting from convection formation. We calculate the complexity using shearlet transform based on a local approach. In contrast to existing methods for calculating complexity, the shearlet transform based approach provides a more detailed representation of local heterogeneities. Our analysis involves experimental images illustrating the mixing process of two non-reactive liquids in a Y-type continuous-flow microchannel under conditions of double-diffusive convection formation. The obtained complexity fields characterize the mixing process and structure formation, revealing variations in mass transfer intensity along the microchannel. We compare the results with cases of liquid mixing via a pure diffusive mechanism. Upon analysis, it was revealed that the complexity measure exhibits sensitivity to variations in the type of mass transfer, establishing its feasibility as an indirect criterion for assessing mass transfer intensity. The method presented can extend beyond flow analysis, finding application in the controlling of microstructures of various materials (porosity, for instance) or surface defects in metals, optical systems and other materials that hold significant relevance in materials science and engineering.

show abstract

Section: Experiments In the Q ≠ 0 Casementioning

confidence: 99%

Applying the Shearlet-Based Complexity Measure for Analyzing Mass Transfer in Continuous-Flow Microchannels

Mosheva,

Krasnyakov

2024

FDMP

View full text Add to dashboard Cite

show abstract

“…We previously demonstrated that gravitational field can also serve the same purpose by creating specific conditions that trigger hydrodynamic instabilities. Notably, we illustrated that by exploiting the disparities in density or diffusion coefficients of the pumped reagents, it is possible to promote reagent mixing through gravity -dependent instability mechanisms [9]. The second challenge with microreactors is their small size, which complicates and sometimes restricts the use of visualization and measurement techniques for studying mass transfer processes.…”

Section: Introductionmentioning

confidence: 99%

Solutions Mixing Visualization in Continuous-Flow Microreactors via Interferometric Technique

Mosheva,

Shmyrov,

Mizev

2023

View full text Add to dashboard Cite

The paper demonstrates the potential of interferometry as a visualization technique for studying the mixing processes of liquid reagents in continuous-flow microreactors. We visualized two types of instabilities: double-diffusion convection and Marangoni soluto-capillary convection. We employed two optical schemes, depending on how large values of refractive index inhomogeneities resulting from instabilities needed to be visualized, including the shear interferometer and the Fizeau interferometer. The interferometry enabled a qualitative investigation of the structure and dynamics of the generated convection. In addition, by implementing the phase shift method by the IntelliWave program, we quantified the efficiency of the mixing process between pumped liquids. These quantitative findings complemented our qualitative visualization, providing further evidence of the effectiveness of interferometry in studying mixing processes. Our results confirm that the interferometry technique is an effective tool for the visualization and analysis of convective flows in continuous-flow microreactors. Moreover, the insights gained from this research contribute to the broader understanding and optimization of mixing processes in microreactor systems.

show abstract

Lab-on-a-chip: Efficient Preparation of Bioactive Compounds Using On-chip Flow Synthesis

Chipoline,

Borges,

Ferreira

et al. 2024

Lab-on-a-Chip Devices for Advanced Biomedicines

View full text Add to dashboard Cite

Lab-on-a-chip (LOC) technology enables the efficient preparation of bioactive compounds through on-chip flow synthesis in microdevices. In this chapter, we provide an overview of device miniaturization, its benefits and challenges. We highlight the potential of LOC technology in both chemical synthesis and biological analysis, explore the principles of flow synthesis, present examples of LOC devices, and highlight the importance of the efficient preparation of such compounds. Additionally, we examine potential applications and prospects. This chapter underscores the promising role of LOC technology in advancing chemical synthesis and biological research.

show abstract

Mixing Enhancement By Gravity-dependent Convection in a Y-shaped Continuous-flow Microreactor

Cited by 5 publications

References 47 publications

Applying the Shearlet-Based Complexity Measure for Analyzing Mass Transfer in Continuous-Flow Microchannels

Applying the Shearlet-Based Complexity Measure for Analyzing Mass Transfer in Continuous-Flow Microchannels

Solutions Mixing Visualization in Continuous-Flow Microreactors via Interferometric Technique

Lab-on-a-chip: Efficient Preparation of Bioactive Compounds Using On-chip Flow Synthesis

Contact Info

Product

Resources

About