Emulsions: Principles and preparation - Making emulsions using flow fields - Laminar flow - Plain shear flow and extensional flow
3 important questions on Emulsions: Principles and preparation - Making emulsions using flow fields - Laminar flow - Plain shear flow and extensional flow
What is the Weber number?
The ratio of the externally applied stress and the internal, coherent tension.
Which 2 types of laminar flow are there and what is the difference?
- Simple shear flow --> e.g. through a tube
- Extensional flow --> through a small opening --> more effective in disrupting a droplet
What is the critical Weber number?
The value of the Weber number should be as high as this critical number, to achieve break-up of the droplet.
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