GfsSourceDiffusion

From Gerris

GfsSourceDiffusion is used to add diffusion to a scalar tracer (representing, for example, temperature or concentration).

The syntax in parameter files is:

[ GfsSourceScalar ] [ GfsDiffusion ]

It can also be used to set a viscosity source term on each Cartesian vector component of the velocity, however when the viscosity is non-uniform GfsSourceViscosity should be used instead.

Examples

• B\'enard--von K\'arm\'an Vortex Street for flow around a cylinder at Re=160

  SourceDiffusion {} U 0.00078125

  SourceDiffusion {} V 0.00078125

• Vortex street around a "heated" cylinder

  SourceDiffusion {} T 0.001

  SourceDiffusion {} U 0.00078125

  SourceDiffusion {} V 0.00078125

• Boussinesq flow generated by a heated cylinder

  SourceDiffusion T 0.0001

• Lid-driven cavity at Re=1000

  SourceDiffusion {} U 1e-3

  SourceDiffusion {} V 1e-3

• Circular droplet in equilibrium

  SourceDiffusion U MU

  SourceDiffusion V MU

• Planar capillary waves

  SourceDiffusion U 0.0182571749236

  SourceDiffusion V 0.0182571749236

• Fluids of different densities

  SourceDiffusion U 0.0182571749236

  SourceDiffusion V 0.0182571749236

• Pure gravity wave

  SourceDiffusion {} U 0.0182571749236

  SourceDiffusion {} V 0.0182571749236