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How viscosity ratio affects droplet size? 


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The viscosity ratio has a significant impact on droplet size in microfluidic devices. Studies have shown that at a given capillary number, the size of droplets does not vary appreciably when the viscosity ratio is greater than 1 . However, when the viscosity ratio is decreased, the dispersion process is intensified and smaller droplets are created . Additionally, the relationship between velocity and viscosity ratios, droplet size, and generation rate is non-monotonic . An analytical model that includes a viscosity-dependent breakup time for the dispersed phase has been developed to predict droplet size based on the viscosity ratio . These findings are important for the design of lab-on-chip technologies and the manufacture of microfluidic emulsions, as they provide insights into how system parameters, specifically the viscosity ratio, influence droplet size .

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The viscosity ratio affects droplet size by intensifying the dispersion process and creating smaller drops when the continuous phase viscosity decreases.
The paper states that the viscosity ratio affects the dispersed phase breakup behavior and the squeezing duration, leading to larger droplet sizes. The paper also mentions that previous theoretical models have not considered this dependence of the viscosity ratio on the generated droplet size. However, it does not provide specific details on how the viscosity ratio affects the droplet size.
The paper states that the viscosity ratio affects the dispersed phase breakup behavior and the squeezing duration, leading to larger droplet sizes. The paper also mentions that previous theoretical models have not considered this dependence of the viscosity ratio on droplet size.
The paper states that the viscosity ratio has an impact on droplet size, but it does not provide specific details on how the viscosity ratio affects droplet size.

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