Computational Details:

"Channel flow with two opposite symmetric bumps at medium Reynolds number (different heigth)"

• nonstationary 2D channel flow through two opposite bumps
• symmetric configuration
• channel domain of length 14 and height 1
• height of lower bump 0.36, and of upper bump 0.34
• 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=20,000

• coarse mesh (=level 1): 5 cells, 12 vertices, 37 d.o.f.`s
• shown mesh (=level 3): 80 cells, 105 vertices, 448 d.o.f.`s
  

  
  
  

• uniform refinements with exact boundary adaption
• visualization on level 7: 20,480 cells, 20,865 vertices, 103,168 d.o.f.`s
• computational mesh on level 9: 327,680 cells, 329,217 vertices, 1,641,472 d.o.f.`s
• nonconforming nonparametric rotated bilinear fem's (meanvalue version), UPW

• equidistant time stepping for computation with k=0.0055555556
• equidistant time stepping for visualization with k=0.10 (= 1 frame)
• Total time T=50 corresponds to 9,000 time steps
• fractional step theta scheme

• date: 06/27/97
• simulation by: S.Turek
• visualization by: S.Turek
• IBM RS6000/590: 300 MB, 583,022 seconds
• AVS data: 1,725 MB
• Software: FEATFLOW1.0 + BOUSS

• 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 problem-specific data for the applied software version including parameter files and input data can be downloaded here!