Instability of viscoelastic curved liquid jets with surfactants

Abdullah Madhi Alsharif, Jamal Uddin

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
254 Downloads (Pure)

Abstract

The prilling process is a common technique utilised in different applications in many industrial and engineering processes. Typically in such a process a liquid jet emerges from an orifice and thereafter breaks up into small spherical droplets of various sizes due to interfacial instabilities. As is common in many industrial applications the fluid used is often a mixture of various fluids and will typically contain polymers or other additives which will cause the fluid to behave like a non-Newtonian fluid. Furthermore, surfactants may be used in such processes to manipulate the size of the resulting droplets. In this paper, we model the fluid as a viscoelastic liquid and use the Oldroyd-B constitutive equation. We reduce the governing equations into a set of one-dimensional equations by using an asymptotic analysis and then we examine steady state solutions for viscoelastic rotating liquid jets with surfactants. We thereafter examine small perturbations to this steady state to investigate both linear and non-linear instability of the liquid jet.
Original languageEnglish
Pages (from-to)1-12
JournalJournal of Non-Newtonian Fluid Mechanics
Volume216
Early online date15 Dec 2014
DOIs
Publication statusPublished - 1 Feb 2015

Keywords

  • Viscoelastic jets
  • Break-up
  • Rotation
  • Surfactants

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