The effect of junction gutters for the upscaling of droplet generation in a microfluidic T-Junction

VISWANATHAN, Harish (2022). The effect of junction gutters for the upscaling of droplet generation in a microfluidic T-Junction. Microgravity Science and Technology, 34 (3): 43.

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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.

Item Type: Article
Uncontrolled Keywords: 0299 Other Physical Sciences; Fluids & Plasmas
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SWORD Depositor: Symplectic Elements
Depositing User: Symplectic Elements
Date Deposited: 03 May 2022 14:04
Last Modified: 12 Oct 2023 11:45

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