6.2 PASS:
Poiseuille flow

Author
 Stéphane Popinet
 Command
 sh poiseuille.sh poiseuille.gfs
 Version
 100416
 Required files
 poiseuille.gfs (view) (download)
poiseuille.sh error.ref
 Running time
 4 seconds
A simple parabolic Poiseuille flow in a periodic channel with a
constant alongchannel acceleration a. The theoretical solution is given by:
Figure 65 illustrates the norms of the error between
the computed and theoretical solutions as functions of spatial
resolution.
Figure 65: Convergence of the error norms as functions
of resolution (number of grid points across the channel). 
6.2.1 PASS:
Bagnold flow of a granular material

Author
 PierreYves Lagrée
 Command
 sh ../poiseuille.sh bagnold.gfs
 Version
 100416
 Required files
 bagnold.gfs (view) (download)
error.ref
 Running time
 42 seconds
The flow of a granular material down an inclined plane is simulated
using a "µ(I)" rheology. The computed velocity profile is
compared with Bagnold’s theoretical solution.
Figure 66 illustrates the norms of the error between
the computed and theoretical solutions as functions of spatial
resolution.
Figure 66: Convergence of the error norms as functions
of resolution (number of grid points across the channel). 