Liquid Flow through Aqueous Foams: The Node-Dominated Foam Drainage Equation

From Soft-Matter
Revision as of 03:55, 30 November 2009 by Perry (Talk | contribs) (Summary)

Jump to: navigation, search

under construction by Rebecca Perry


  • [1] Koehler, S., Hilgenfeldt, S., & Stone, H. Physical Review Letters. 82, 21. 4232-4235 (1999).
  • Keywords: Foam, Drainage, Plateau Border, Tetrakaidecahedron (Kelvin Cell)


Koehler, Hilgenfeldt, and Stone write about fluid flow through the network of channels in a soap foam. The article presents an existing theory, a new theory, and experimental evidence supporting their new theory.

The first hurdle the researchers crossed was figuring out how to quantify such a complex flow. They decided to look at the bulk flow driven by gravity rather than attempt to observed the flow in any one channel.

The experimenters were able to change the bubble size and the amount of fluid added to the top of the foam tube. They recorded two velocities using fluorescing markers.

Old Theory: "rigid channel walls" <math>\nu_f=(V_0^{rigid}V_s)^{1/2}</math>

New Theory: "channel-slip theory"

Soft Matter Details