GfsVariableTracerVOF

From Gerris

lidelgetdr A GfsVariableTracerVOF defines a volume-fraction field advected using the geometrical Volume-Of-Fluid technique.

The syntax in parameter files is:

[ GfsVariableTracer ]

Whenever a new GfsVariableTracerVOF is created called T for example, four additional variables (three in 2D) are automatically created:

T_x

the x-component of the normal to the interface,

T_y

the y-component of the normal to the interface,

T_z

the z-component of the normal to the interface (3D only),

T_alpha

the value such that the normalised equation of the interface in a given cell is given by T_x*x + T_y*y + T_z*z = T_alpha.

The interfacial area (length in 2D) per unit volume (area in 2D) can be computed within a GfsFunction using the predefined area() function. For example

GfsOutputScalarSum { istep = 1 } area { v = area("T") }

with "T" the name of a GfsVariableTracerVOF will compute the time evolution of the total interface area (length in 2D).

Examples

• Rayleigh-Taylor instability

  VariableTracerVOF {} T

• Collapse of a column of grains

    VariableTracerVOF T

    VariableTracerVOF Ti

• Viscous folding of a fluid interface

    VariableTracerVOF T

• Savart--Plateau--Rayleigh instability of a water column

    VariableTracerVOF T

• Atomisation of a pulsed liquid jet

    VariableTracerVOF T

• Air-water flow around a Series 60 cargo ship

    VariableTracerVOF T

• Comparison between explicit and implicit diffusion schemes on concentration tracer

    VariableTracerVOF T

• Mass conservation

    VariableTracerVOF T

• Mass conservation with solid boundary

    VariableTracerVOF T

• Dielectric-dieletric planar balance

    VariableTracerVOF T

• Balance with solid boundaries

    VariableTracerVOF T

• Charge relaxation in an axisymmetric insulated conducting column

    VariableTracerVOF T

• Charge relaxation in a planar cross-section

    VariableTracerVOF T

• Equilibrium of a droplet suspended in an electric field

    VariableTracerVOF T