Capillary Breakup Extensional Rheometer (CABER)

• A quantitative version of the ‘thumb & forefinger’ test!

  • Original experimental and theoretical work of V. Entov & co-workers

Generate

Liquid Bridge

Monitor Dmid(t) & D(z,t)

• Shape of Dmid(t) curve and time to breakup provide information about extensional rheological properties of fluid at large strains.

  • Small sample volume, rapid test, useful for foods, dyes, consumer products...

6 mm

5 mm

Micrometer

Video

Form Filament

15 – 25 mm

Newtonian

Viscoelastic

Adhesive

Dmid(t)

tbreak

Time

Diameter

Previous slide

Next slide

Back to first slide

View graphic version