1. A Lagrangian–Eulerian approach for the numerical simulation of free-surface flow of a viscoelastic material
- Author
-
Jie Li, E. J. Hinch, and Jocelyn Etienne
- Subjects
Physics ,Computer simulation ,Discretization ,Applied Mathematics ,Mechanical Engineering ,General Chemical Engineering ,Numerical analysis ,Mechanics ,Condensed Matter Physics ,Finite element method ,Physics::Fluid Dynamics ,Euler–Lagrange equation ,Classical mechanics ,Flow (mathematics) ,Drag ,Free surface ,General Materials Science - Abstract
A new numerical method specially adapted to the free-surface flow of viscoelastic material is proposed. It is based on a Lagrangian discretisation of the material and objective derivatives, which accounts well for the hyperbolic nature of these terms and goes well with a Lagrangian tracking of a time-evolving domain. Through the Arbitrary Lagrangian–Eulerian (ALE) formulation, the method can also be applied efficiently to solid-boundary problems, and is tested on the benchmark problem of the drag on a cylinder in a channel. The collapse of a column of Oldroyd-B fluid is then considered: under the action of surface tension, the column undergoes large deformation leading to the “beads-on-string” structure. Asymptotic results on the evolution of this structure are recovered in numerical simulations, and further features of this flow are exhibited.
- Published
- 2006