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A continuum method for modeling surface tension. (English) Zbl 0775.76110
Summary: A new method for modeling surface tension effects on fluid motion has been developed. Interfaces between fluids of different properties, or “colors”, are represented as transition regions of finite thickness, across which the color variable varies continuously. At each point in the transition region, a force density is defined which is proportional to the curvature of the surface of constant color at that point. It is normalized so that the conventional description of surface tension on an interface is recovered when the ratio of local transition region thickness to local radius of curvature approaches zero. The continuum method eliminates the need for interface reconstruction, simplifies the calculation of surface tension, enables accurate modeling of two- and three-dimensional fluid flows driven by surface forces, and does not impose any modeling restrictions on the number, complexity, or dynamic evolution of fluid interfaces having surface tension. Computational results for two-dimensional flows are given to illustrate the properties of the method.

MSC:
76M20 Finite difference methods applied to problems in fluid mechanics
76D45 Capillarity (surface tension) for incompressible viscous fluids
76B45 Capillarity (surface tension) for incompressible inviscid fluids
Software:
SOLA-VOF
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References:
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