
Description of the flow problem

nonstationary 2D channel flow over squared cavity

channel domain of length 5 and height 1

cavity domain of width and height 1

total height 2

length before cavity 1, after cavity 3

inflow b.c.'s: parabolic with maximum velocity 1

outflow b.c.'s: natural "do nothing" b.c.'s

other b.c.'s: zero velocity at fixed walls

initial condition at t=0: starting from rest

viscosity parameter: 1/nu=10,000


Description of the spatial discretization

coarse mesh (=level 1): 69 cells, 90 vertices, 385 d.o.f.`s

uniform refinements with exact boundary adaption

visualization on level 5: 17,664 cells, 17,985 vertices,
88,960 d.o.f.`s

computational mesh on level 6: 70,656 cells, 71,297 vertices,
355,201 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=0.0333334

equidistant time stepping for visualization with k=0.2 (= 1
frame)

Total time T=60 corresponds to
1,800 time steps

fractional step theta scheme


Computer requirements

date: 07/11/97

simulation by: S.Turek/W.Kress

visualization by: S.Turek/W.Kress

SGI PowerIndigo2/R10000: 60 MB, 54,126 seconds

AVS data: 892 MB

Software: FEATFLOW1.0 + BOUSS


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
