16 Questions
In the context of microfluidic systems, what is the purpose of flow focusing?
Create a uniform flow profile
What effect does the surfactant have on the interface?
Surface tension decreases
What is the significance of Coaxial Injection in the formation of droplets?
Enhances mixing efficiency
How does the T-Junction structure contribute to plug formation in microfluidic systems?
Aids in droplet breakup
What is a key advantage of using passive structures in the formation of droplets?
Improves control over droplet size
Which characteristic best describes the diffusion process between droplets highlighted in the text?
Mainly driven by surface tension gradients
What is the impact of increasing the volume flow rate (vcont) on droplet formation through coaxial injection?
Increase in cutting length and number of droplets per time
What kind of flow behavior is observed when the volume flow rate (vcont) is low in coaxial injection?
Dripping
How does an increase in volume flow rate (vcont) affect the number of satellite droplets in coaxial injection?
Increase in the number of satellite droplets
What is the significance of an inclined cover plate in droplet formation?
It increases the number of droplets per time
In the generation of droplets using an inclined cover plate, what happens with an increase in angle alpha (α)?
No volume flow rate of continuous phase needed
How does a high volume flow rate (vcont) affect droplet formation through coaxial injection?
Jetting behavior is observed instead of dripping
What does the Laplace pressure do in the liquid phase when the jet radius decreases?
Increases
What is the relationship between the pressure gradient and the flow inside the jet?
Directly proportional
What happens to a thin jet of liquid when disturbances with wavelengths greater than or equal to 2𝜋𝑅0 occur?
Breaks into droplets
What relationship do Effects 1 and 2 have in terms of competition?
They oppose each other
Test your knowledge on droplets and diffusion in microfluidic systems, focusing on properties such as diffusion from one droplet to another through the continuous phase. This quiz is based on a lecture by Prof. Dr.-Ing. Uwe Schnakenberg at the Institute of Materials in Electrical Engineering.
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