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SUMMARY:Numerical Simulation of Viscoelastic Free Surface Flows - Susanne 
 Claus\, UCL
DTSTART:20141023T103000Z
DTEND:20141023T113000Z
UID:TALK54622@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:Many industrial processes such as fibre spinning\, ink-jet pri
 nting or film blowing involve the flow of viscoelastic liquids and the def
 ormation of their fluid surface. Understanding the detailed flow patterns 
 of these flow configurations is crucial for the optimisation of these indu
 strial processes. Here\, computer simulations can aid and complement exper
 imental studies of these flow problems.\n \nHowever\, the numerical simula
 tion of these industrial processes in general and for viscoelastic fluids 
 in particular is far from being trivial and a highly active area of curren
 t research. The main challenges facing the development of efficient soluti
 on methods can be attributed to:\n\n1. the solution of a non-linear set of
  equations that describe the viscoelastic fluid\,\n\n2. the need for a sui
 table and accurate representation of the fluid surface.\n \nIn this talk\,
  we will discuss different numerical methods to address these challenges. 
 In particular\, we will introduce stabilisationtechniques for Oldroyd-B an
 d Giesekus fluids as well as compare fluid surface tracking techniques suc
 h as ALE and unfitted finite element methods. We will explore strengths an
 d weaknesses of these different discretisation methods in a range of flow 
 configurations such as extrudate swell and filament stretching.\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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