Print Email Facebook Twitter CSF model performance for Rayleigh-Taylor instability Part of: ECCOMAS CFD 2006: Proceedings of the European Conference on Computational Fluid Dynamics· list the conference papers Title CSF model performance for Rayleigh-Taylor instability Author Yakovenko, S.N. Chang, K.C. Date 2006-09-05 Abstract In the present study, the surface tension is introduced as volume forces according to the continuum surface force (CSF) model [1] using the surface tension coefficient and the mollified volume fraction (color) function. The latter can be taken in the first approximation as the volume fraction defined numerically due to (possible) smoothing of numerical schemes. However, accurate representation of the mollified color function assumes that it is varies smoothly across the interface by convolving f with an interpolation function (smooth kernel) K. The properties (compactness, monotonic decreasing, symmetry, differentiation, normality, limit behavior) of K and some examples of its choosing are presented in [1]. In particular, the simple form a new eight-order polynomial kernel results in a trivial and computationally efficient implementation. In [2] it was successfully applied to modeling a spherical drop in static equilibrium and was proven to be workable for circular and spherical interfaces in the infinite region. In the present work, the convolving expression with this kernel is formulated for plane 2D flows constricted by solid or symmetry boundaries and tested for a Rayleigh-Taylor instability (RTI). The RTI flow is a benchmarked problem in free surface hydrodynamics chosen in many theoretical [2] and numerical studies too. Subject Rayleigh-Taylor instabilityinterface resolutioncontinuum surface force modelKernel function To reference this document use: http://resolver.tudelft.nl/uuid:e7440b45-a90f-4068-b484-1f1d0788dd05 Part of collection Conference proceedings Document type conference paper Rights (c) 2006 Yakovenko, S.N.; Chang, K.C. Files PDF Yakovenko.pdf 988.06 KB Close viewer /islandora/object/uuid:e7440b45-a90f-4068-b484-1f1d0788dd05/datastream/OBJ/view