Beads-on-String Structure for Viscoelastic Jets

It is well known that a viscoelastic jet breaks up much more slowly than a Newtonian jet. Typically, it evolves into the so-called beads-on-string structure, where large drops are connected by thin threads. The slow breakup process provides the viscoelastic jet sufficient time to exhibit some new phenomena, including drop migration, drop oscillation, drop merging and drop draining. We have investigated these phenomena using a 1D Oldroyd-B model [1]. A series of movies are available at http://www2.eng.cam.ac.uk/~jl305/visjet.html.

Bibliography

[1] Jie Li and Marco A. Fontelos, 2003. Drop Dynamics on the Beads-on-String Structure for Viscoelastic Jets: a Numerica l Study. Phys. Fluids, vol.15(4), pp. 922--937.

[2] Marco A. Fontelos and Jie Li, 2004. On the evolution and rupture of filaments in Giesekus and FENE models. J. Non-Newtonian Fluid Mech. , Vol.118, pp. 1-16.

[3] Clasen C., Eggers J., Fontelos M., Li J. and McKinley G., 2006, The beads-on-string structure of viscoelastic jets. J. Fluid Mech.