GfsAdaptGradient

From Gerris

GfsAdaptGradient uses a "cell cost" defined as the norm of the local gradient of a given variable or function multiplied by the cell size.

The syntax in parameter files is:

[ GfsAdapt ] [ GfsFunction ]

Examples

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

  AdaptGradient { istep = 1 } { maxlevel = 6 cmax = 1e-2 } T

• Vortex street around a "heated" cylinder

  AdaptGradient { istep = 1 } { maxlevel = 6 cmax = 1e-2 } T

• Parallel simulation on four processors

  AdaptGradient { istep = 1 } { maxlevel = 6 cmax = 1e-2 } T

• Rayleigh-Taylor instability

  AdaptGradient { istep = 1 } { maxlevel = 7 cmax = 1e-2 } T

• Boussinesq flow generated by a heated cylinder

  AdaptGradient { istep = 1 } { maxlevel = 8 cmax = 5e-2 } T

• "Garden sprinkler effect" in wave model

    AdaptGradient { istep = 1 } { cmax = 0.04 minlevel = MINLEVEL maxlevel = 6 } Hs

• Small amplitude solitary wave interacting with a parabolic hump

    AdaptGradient { istep = 1 } { 
	cmax = 1e-4
	cfactor = 2
	maxlevel = 8
	minlevel = 6
    } (P + Zb)

• Time-reversed VOF advection in a shear flow

    AdaptGradient { istep = 1 } { cmax = 1e-2 maxlevel = 8 } T

• Viscous flow past a sphere

    AdaptGradient { istep = 1 } { cmax = 5e-2 maxlevel = LEVEL } U

    AdaptGradient { istep = 1 } { cmax = 5e-2 maxlevel = LEVEL } V

• Mass conservation

    AdaptGradient { istep = 1 } { cmax = 1e-3 minlevel = 4 maxlevel = (x < 0.25 ? 6 : 7) } T1

• Mass conservation with solid boundary

    AdaptGradient { istep = 1 } { cmax = 1e-3 minlevel = 4 maxlevel = (x < 0. ? 7 : 8) } T1

• Momentum conservation for large density ratios

    AdaptGradient { istep = 1 } { cmax = 1e-3 maxlevel = level } T

• Circular droplet in equilibrium

  AdaptGradient { istep = 1 } { cmax = 1e-6 maxlevel = LEVEL } T

• Axisymmetric spherical droplet in equilibrium

  AdaptGradient { istep = 1 } { cmax = 1e-6 maxlevel = LEVEL } T

• Advection of a cosine bell around the sphere

  AdaptGradient { istep = 1 } { cmax = 1e-4 maxlevel = LEVEL } T