Computational Details:

"Flow over a Backward Facing Step at medium Reynolds number"

• nonstationary 2D channel flow over a "backward facing step"
• channel width: before/after step/total: 3/10/13
• channel height: before/after step/total: 0.5/1/1
• 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=1,000

• coarse mesh (=level 1): 50 cells, 69 vertices, 286 d.o.f.`s
  

  
  
  

• uniform refinements with exact boundary adaption
• visualization on level 5: 12,800 cells, 13,089 vertices, 64,576 d.o.f.`s
• computational mesh on level 7: 204,800 cells, 205,953 vertices, 1,026,304 d.o.f.`s
• nonconforming nonparametric rotated bilinear fem's (meanvalue version), UPW

• equidistant time stepping for computation with k=0.06666667
• equidistant time stepping for visualization with k=0.20 (= 1 frame)
• Total time T=100 corresponds to 1,500 time steps
• fractional step theta scheme

• date: 05/28/97
• simulation by: S.Turek
• visualization by: J.Wallis
• SGI PowerIndigo2/R10: 176 MB, 98,026 seconds
• AVS data: 1,080 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!