GfsEventStop

From Gerris

GfsEventStop is used to stop the simulation when steady-state is reached. This is done by monitoring the maximum change in a given variable at every locations between successive calls to GfsEventStop. If the absolute value of this change is smaller than or equal to a user-defined threshold the simulation is stopped.

The syntax in parameter files is:

[ GfsEvent ] V THRESHOLD ( DV )

where V is a variable, THRESHOLD a number and DV an optional variable name. If DV is given, the corresponding field contains the difference in V between successive calls.

Examples

• Lunar tides in Cook Strait, New Zealand

    EventStop { start = 100000 istep = 100 } A0 0.025

• Viscous flow past a sphere

    EventStop { step = 0.1 } U 1e-3 DU

• Lid-driven cavity at Re=1000

  EventStop { istep = 10 } U 1e-4 DU

• Lid-driven cavity at Re=1000 (explicit scheme)

  EventStop { istep = 10 } U 1e-4 DU

• Poiseuille flow

    EventStop { istep = 1 } U 1e-6 DU

• Creeping Couette flow of Generalised Newtonian fluids

  EventStop { istep = 1 } U 1e-4 DU

• Circular droplet in equilibrium

  EventStop { istep = 10 } T DT

• Axisymmetric spherical droplet in equilibrium

  EventStop { istep = 10 } T DT