Isogeometric Analysis of the Navier-Stokes-Cahn-Hilliard equations with application to incompressible two-phase flows
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Date
2016-12
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Abstract
In this work, we present our numerical results of the application of Galerkin-based Isogeometric Analysis
(IGA) to incompressible Navier-Stokes-Cahn-Hilliard (NSCH) equations in velocity-pressure-phase field-chemical potential formulation. For the approximation of the velocity and pressure fields, LBB compatible non-uniform rational B-spline spaces are used which can be regarded as smooth generalizations of Taylor-Hood pairs of finite element spaces. The one-step \theta-scheme is used for the
discretization in time. The static and rising bubble, in addition to the nonlinear Rayleigh-Taylor
instability flow problems, are considered in two dimensions as model problems in order to investigate
the numerical properties of the scheme.
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Keywords
two-phase flow, Cahn-Hilliard phase field model, Navier-Stokes-Cahn-Hilliard equation, isogeometric Analysis, isogeometric finite elements, B-splines, rising bubble, NURBS, Rayleigh-Taylor instability