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A finite element approach to incompressible two-phase flow on manifolds
被引:71
作者:
Nitschke, I.
[1
]
Voigt, A.
[1
,2
]
Wensch, J.
[1
]
机构:
[1] Tech Univ Dresden, Inst Wissensch Rechnen, D-01062 Dresden, Germany
[2] Tech Univ Dresden, Ctr Adv Modeling & Simulat, D-01062 Dresden, Germany
关键词:
Membranes;
Multiphase flow;
Navier-Stokes equations;
PARTIAL-DIFFERENTIAL-EQUATIONS;
PHASE-SEPARATION DYNAMICS;
INTERFACE;
FLUID;
DOMAINS;
MOTION;
D O I:
10.1017/jfm.2012.317
中图分类号:
O3 [力学];
学科分类号:
08 ;
0801 ;
摘要:
A two-phase Newtonian surface fluid is modelled as a surface Cahn-Hilliard-Navier-Stokes equation using a stream function formulation. This allows one to circumvent the subtleties in describing vectorial second-order partial differential equations on curved surfaces and allows for an efficient numerical treatment using parametric finite elements. The approach is validated for various test cases, including a vortex-trapping surface demonstrating the strong interplay of the surface morphology and the flow. Finally the approach is applied to a Rayleigh-Taylor instability and coarsening scenarios on various surfaces.
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页码:418 / 438
页数:21
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