# Title: Poisson solution in a dumbbell-shaped domain
#
# Description:
#
# Domains with a dumbbell topology can trigger an instability in the
# Poisson solver if care is not taken.
#
# Author: St\'ephane Popinet
# Command: sh dumbell.sh
# Version: 0.9.3
# Required files: dumbell.sh
#
1 0 GfsPoisson GfsBox GfsGEdge {} {
  Refine 3
  ApproxProjectionParams { nitermax = 1000 minlevel = 1 tolerance = 1e-30 }
  Solid dumbell.gts
  Init {} { Div = y }
  OutputProjectionStats { istep = 1 } stdout
}
GfsBox {}