
Description of the flow problem

nonstationary 2D "lid driven cavity" flow

squared domain of length 1

Dirichlet b.c.'s for the uvelocity at the top: u=1 for y=1

other b.c.'s: zero velocity elsewhere for u and v

initial condition at t=0: starting from fully developed flow

viscosity parameter: 1/nu=20,000


Description of the spatial discretization

coarse mesh (=level 1): 53 cells, 72 vertices, 301 d.o.f.`s

uniform refinements with exact boundary adaption

visualization on level 5: 13,568 cells, 13,857 vertices,
68,416 d.o.f.`s

computational mesh on level 7: 217,088 cells, 218,241 vertices,
1,087,744 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=0.01111112

equidistant time stepping for visualization with k=0.1 (= 1
frame)

Total time T=50 corresponds to
4,500 time steps

fractional step theta scheme


Computer requirements

date: 04/30/97

simulation by: S.Turek

visualization by: S.Turek/W.Bangerth

IBM RS6000/590: 200 MB, 224,154 seconds

AVS data: 1,100 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
