Electrohydrodynamic droplet formation in a T-junction microfluidic device

Singh, Rahul; Bahga, Supreet Singh; Gupta, Amit

doi:10.1017/jfm.2020.749

Cited by 15 publications

(2 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1–19 Physics of droplet-substrate interaction has been an attractive field of science in various technologies including healthcare, aerospace, electronics, coatings, printings and materials science. 20…”

Section: Introductionmentioning

confidence: 99%

Physics of droplet impact on flexible materials: A review

Karim

2022

Advances in Mechanical Engineering

View full text Add to dashboard Cite

Droplet impact on a flexible substrate is a prevalent phenomenon in nature and various advanced technologies such as soft bio-printing, tissue engineering, smart biomaterials and flexible electronics. Recent rapid advancement in new functional surfaces, ultra-high-speed imaging, nanotechnology, deep learning, advanced computational strength and the relation between fluid dynamics and interfacial science have intensified the physical understanding of droplet impact on soft materials. Once a droplets impacts on a solid surface, it deposits, spreads, rebounds or splashes. Given the importance of the droplet impact onto soft substrates in biotechnology, medicine and advanced flexible electronics, a deep physical understanding of such complex phenomenon is vital. This review initially presents the liquid-solid interaction physics and relevant interfacial science. Next, this review discusses the physics of droplet impact on soft materials with different physical and interfacial characteristics. Moreover, this review presents advancements in droplet impact on elastic materials relevant to new technologies such as soft electronics, elastic smart biomaterials, tissue engineering and the fight against COVID-19 pandemic. Finally, this review lays out future research directions related to current problems in such complex physical phenomenon.

show abstract

Section: Introductionmentioning

confidence: 99%

Physics of droplet impact on flexible materials: A review

Karim

2022

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…Therefore, to overcome such challenges, several passive and active methods have been proposed where the former does not require external actuation. In contrast, the latter typically makes use of additional energy through electrical (Singh et al, 2020), thermal (Murshed et al, 2008), magnetic (Tan and Nguyen, 2011), and mechanical actuation (Churski et al, 2010) with which the droplets are generated within the framework of a T-junction configuration. Although most active methods yield an excellent coefficient of variation and present a range of possibilities for drop generation, the challenges for parallelization, an additional level of complexity in handing the external input, and costbased constraints may persist depending on the nature of the external input employed (Chong et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Junction Gutters for the Upscaling of Droplet Generation in a Microfluidic T-Junction

Viswanathan

2022

Microgravity Sci. Technol.

View full text Add to dashboard Cite

The influence of drop formation due to micro rib-like structures, viz., the Junction Gutters (JGs) within a standard microfluidic T-junction, is numerically investigated. Hydrodynamic conditions that lead to various flow regimes are identified characterized by the Capillary number (Ca) and velocity ratios of the dispersed and continuous phases (q) within a standard T-junction. Subsequently, under such conditions, a range of gutter configurations is introduced in the standard channel. The results predict that the introduction of JGs can favourably alter the formation frequency and morphology of drops and, consequently, promote upscaling significantly for the hydrodynamic conditions associated with low Ca. Detailed flow maps are presented that reveal a plethora of transitions during the formation of droplets with higher Ca and q that would otherwise signify a dripping or a jetting regime in a standard junction. However, specific gutter configurations are identified where JGs are unfavourable for generating monodisperse droplets.

show abstract