
Description of the flow problem

length/width of channel: 2.2/0.41

diameter of circles : 0.2

maximum vertical speed of circles : +/1.885

Dirichlet b.c.'s on circle surface (= differentiation of the
circle speed)

other b.c.'s: zero velocity at walls of the channels

initial condition at t=0: starting from rest

viscosity parameter: 1/nu=1000


Description of the spatial discretization

coarse mesh (=level 1): 132 cells, 161 vertices, 716 d.o.f.`s

same tensor product mesh for ALL TIME STEPS !!!

visualization on level 5: 33,792 cells, 34,241 vertices,
169,856 d.o.f.`s

computation on level 5: 33,792 cells, 34,241 vertices,
169,856 d.o.f.`s

nonconforming nonparametric rotated bilinear fem's (meanvalue
version), UPW


Description of the temporal discretization

equidistant time stepping for computation with k=0.003333334

equidistant time stepping for visualization with k= 0.01 (= 1
frame)

Total time T=6 seconds corresponds to
2,512 time steps

fractional step theta scheme


Computer requirements

date: 10/20/01

simulation by: S.Turek

visualization by: S.Turek

SUN ULTRA 45/400: 36 MB, 23,118 seconds

GMV data: 1,800 MB

Software: FEATFLOW1.1 + PP2D_MOVBC


Mathematical details

For more details about numerical and algorithmic aspects see the
`Mathematical Background' in the
FEATFLOW manual
or
visit our
paper archive for much more details.

The problemspecific data for the applied software version
including parameter files and
input data can be downloaded
here!


Please send any comments and suggestions to:
featflow@featflow.de
