X-ray micro-imaging of flows in opaque conduits

Lee, S. J.; Kim, G. B.; Kim, Seyoung; Kim, Y. M.; Yoon, Ho Geun

doi:10.1007/bf03181799

Cited by 2 publications

(3 citation statements)

References 11 publications

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“…In a recent study, XMI was applied to directly visualize water droplet spreading and penetration inside a membrane in an oily environment [207]. Despite being a powerful investigation technique for fouling investigation, the application of XMI to microfluidic systems is mainly related to the field of flow measurements and velocimetry [208][209][210].…”

Section: Ellipsometrymentioning

confidence: 99%

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Membrane Fouling Phenomena in Microfluidic Systems: From Technical Challenges to Scientific Opportunities

2021

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The almost ubiquitous, though undesired, deposition and accumulation of suspended/dissolved matter on solid surfaces, known as fouling, represents a crucial issue strongly affecting the efficiency and sustainability of micro-scale reactors. Fouling becomes even more detrimental for all the applications that require the use of membrane separation units. As a matter of fact, membrane technology is a key route towards process intensification, having the potential to replace conventional separation procedures, with significant energy savings and reduced environmental impact, in a broad range of applications, from water purification to food and pharmaceutical industries. Despite all the research efforts so far, fouling still represents an unsolved problem. The complex interplay of physical and chemical mechanisms governing its evolution is indeed yet to be fully unraveled and the role played by foulants’ properties or operating conditions is an area of active research where microfluidics can play a fundamental role. The aim of this review is to explore fouling through microfluidic systems, assessing the fundamental interactions involved and how microfluidics enables the comprehension of the mechanisms characterizing the process. The main mathematical models describing the fouling stages will also be reviewed and their limitations discussed. Finally, the principal dynamic investigation techniques in which microfluidics represents a key tool will be discussed, analyzing their employment to study fouling.

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Section: Ellipsometrymentioning

confidence: 99%

“…Despite being a powerful investigation technique for fouling investigation, the application of XMI to microfluidic systems is mainly related to the field of flow measurements and velocimetry [ 208 , 209 , 210 ].…”

Section: Dynamic Investigation Techniquesmentioning

confidence: 99%

Membrane Fouling Phenomena in Microfluidic Systems: From Technical Challenges to Scientific Opportunities

2021

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“…In addition, by controlling the time interval between consecutive double snap-shots more than a second, the total exposure time to the test sample can be reduced to less than 1% over the course of the entire X-ray imaging experiment. Recently, several types of liquid flow inside opaque conduits were investigated using the X-ray PIV method (Lee and Kim 2005;Kim and Lee 2006;Lee et al 2007;Fouras et al 2007;Im et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Hollow microcapsules for sensing micro-scale flow motion in X-ray imaging method

Kim

Lim

Lee

2008

Microfluid Nanofluid

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For synchrotron X-ray micro-imaging of micro-scale biological flows in organisms, the development of a suitable flow-sensing tracer is essential for visualizing opaque flows quantitatively. In order to achieve this development in this study, the techniques employed in three different research fields were integrated namely, X-ray optics for enhancing X-ray concentration, fluid dynamics to satisfy the flow traceability and drug delivery system to fabricate bio-compatible microcapsules. On the front burner, we need a special sensor which can be well observed in X-ray micro-imaging and follow working fluid as well. As a result, bio-compatible micro-scale microcapsule sensors that perform the role of spherical micro lenses were developed. These novel microcapsules exhibit not only much improved contrast enhancement but also better performance as sensor tracers in micro-scale flows, compared to conventional solid particles.

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X-ray micro-imaging of flows in opaque conduits

Cited by 2 publications

References 11 publications

Membrane Fouling Phenomena in Microfluidic Systems: From Technical Challenges to Scientific Opportunities

Membrane Fouling Phenomena in Microfluidic Systems: From Technical Challenges to Scientific Opportunities

Hollow microcapsules for sensing micro-scale flow motion in X-ray imaging method

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