Mechanisms of carding by Lee, M

“…A model for a slender thread or fibre in a slow viscous incompressible fluid is derived. …”

Persistence of memory in drop breakup: the breakdown of universality by Doshi, P, Cohen, I, Zhang, W, Siegel, M, Howell, P, Basaran, O, Nagel, S

“…A finite interior viscosity, no matter how small, cuts off this form of singularity and produces an unexpectedly long and slender thread. If exterior viscosity is large enough, however, the cutoff does not occur because the minimum drop radius reaches subatomic dimensions first.…”

Formation of beads-on-a-string structures during break-up of viscoelastic filaments by Bhat, Pardeep P., Appathurai, Santosh, Harris, Michael T., Pasquali, Matteo, McKinley, Gareth H., Basaran, Osman A.

“…If a filament is formed by placing a drop of saliva between a thumb and forefinger and is stretched, the filament’s morphology close to break-up corresponds to beads of several sizes interconnected by slender threads. Although there is general agreement that formation of such beads-on-a-string (BOAS) structures occurs only for viscoelastic fluids, the underlying physics remains unclear and controversial. …”
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Extensional thin layer flows by Howell, P

“…In this thesis we derive and solve equations governing the flow of slender threads and sheets of viscous fluid. Our method is to solve the Navier-Stokes equations and free surface conditions in the form of asymptotic expansions in powers of the inverse aspect ratio of the fluid, i.e. the ratio of a typical thickness to a typical length. …”